Search references:
| 41. | Guan, Tianfu; Liang, Suzhe; Kang, Yicui; Pensa, Evangelina; Li, Dong; Liang, Wenkai; Liang, Zhiqiang; Bulut, Yusuf; Reck, Kristian A; Xiao, Tianxiao; Guo, Renjun; Drewes, Jonas; Strunskus, Thomas; Schwartzkopf, Matthias; Faupel, Franz; Roth, Stephan V; Cortés, Emiliano; Jiang, Lin; Müller-Buschbaum, Peter: High-Power Impulse Magnetron Sputter Deposition of Ag on Self-Assembled Au Nanoparticle Arrays at Low-Temperature Dewetting Conditions. In: ACS Applied Materials and Interfaces, 16 (30), pp. 40286 – 40296, 2024, ISSN: 19448244, (Cited by: 0; All Open Access, Hybrid Gold Open Access). (Type: Journal Article | Abstract | Links | BibTeX) @article{Guan202440286, title = {High-Power Impulse Magnetron Sputter Deposition of Ag on Self-Assembled Au Nanoparticle Arrays at Low-Temperature Dewetting Conditions}, author = {Tianfu Guan and Suzhe Liang and Yicui Kang and Evangelina Pensa and Dong Li and Wenkai Liang and Zhiqiang Liang and Yusuf Bulut and Kristian A Reck and Tianxiao Xiao and Renjun Guo and Jonas Drewes and Thomas Strunskus and Matthias Schwartzkopf and Franz Faupel and Stephan V Roth and Emiliano Cortés and Lin Jiang and Peter Müller-Buschbaum}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85199009897&doi=10.1021%2facsami.4c10726&partnerID=40&md5=a7ca86aa0f5e6d9bc9de02d23f1dee67}, doi = {10.1021/acsami.4c10726}, issn = {19448244}, year = {2024}, date = {2024-01-01}, journal = {ACS Applied Materials and Interfaces}, volume = {16}, number = {30}, pages = {40286 – 40296}, publisher = {American Chemical Society}, abstract = {Plasmons have facilitated diverse analytical applications due to the boosting signal detectability by hot spots. In practical applications, it is crucial to fabricate straightforward, large-scale, and reproducible plasmonic substrates. Dewetting treatment, via applying direct thermal annealing of metal films, has been used as a straightforward method in the fabrication of such plasmonic nanostructures. However, tailoring the evolution of the dewetting process of metal films poses considerable experimental complexities, mainly due to nanoscale structure formation. Here, we use grazing-incidence small- and wide-angle X-ray scattering for the in situ investigation of the high-power impulse magnetron sputter deposition of Ag on self-assembled Au nanoparticle arrays at low-temperature dewetting conditions. This approach allows us to examine both the direct formation of binary Au/Ag nanostructure and the consequential impact of the dewetting process on the spatial arrangement of the bimetallic nanoparticles. It is observed that the dewetting at 100 °C is sufficient to favor the establishment of a homogenized structural configuration of bimetallic nanostructures, which is beneficial for localized surface plasmon resonances (LSPRs). The fabricated metal nanostructures show potential application for the surface-enhanced Raman scattering (SERS) detection of rhodamine 6G molecules. As SERS platform, bimetallic nanostructures formed with dewetting conditions turn out to be superior to those without dewetting conditions. The method in this work is envisioned as a facile strategy for the fabrication of plasmonic nanostructures. © 2024 The Authors. Published by American Chemical Society.}, note = {Cited by: 0; All Open Access, Hybrid Gold Open Access}, keywords = {}, pubstate = {published}, tppubtype = {article} } Plasmons have facilitated diverse analytical applications due to the boosting signal detectability by hot spots. In practical applications, it is crucial to fabricate straightforward, large-scale, and reproducible plasmonic substrates. Dewetting treatment, via applying direct thermal annealing of metal films, has been used as a straightforward method in the fabrication of such plasmonic nanostructures. However, tailoring the evolution of the dewetting process of metal films poses considerable experimental complexities, mainly due to nanoscale structure formation. Here, we use grazing-incidence small- and wide-angle X-ray scattering for the in situ investigation of the high-power impulse magnetron sputter deposition of Ag on self-assembled Au nanoparticle arrays at low-temperature dewetting conditions. This approach allows us to examine both the direct formation of binary Au/Ag nanostructure and the consequential impact of the dewetting process on the spatial arrangement of the bimetallic nanoparticles. It is observed that the dewetting at 100 °C is sufficient to favor the establishment of a homogenized structural configuration of bimetallic nanostructures, which is beneficial for localized surface plasmon resonances (LSPRs). The fabricated metal nanostructures show potential application for the surface-enhanced Raman scattering (SERS) detection of rhodamine 6G molecules. As SERS platform, bimetallic nanostructures formed with dewetting conditions turn out to be superior to those without dewetting conditions. The method in this work is envisioned as a facile strategy for the fabrication of plasmonic nanostructures. © 2024 The Authors. Published by American Chemical Society. |
| 42. | Kang, Yicui; João, Simão M; Lin, Rui; Liu, Kang; Zhu, Li; Fu, Junwei; Cheong, Weng-Chon; Lee, Seunghoon; Frank, Kilian; Nickel, Bert; Liu, Min; Lischner, Johannes; Cortés, Emiliano: Effect of crystal facets in plasmonic catalysis. In: Nature Communications, 15 (1), 2024, ISSN: 20411723, (Cited by: 0; All Open Access, Gold Open Access). (Type: Journal Article | Abstract | Links | BibTeX) @article{Kang2024, title = {Effect of crystal facets in plasmonic catalysis}, author = {Yicui Kang and Simão M João and Rui Lin and Kang Liu and Li Zhu and Junwei Fu and Weng-Chon Cheong and Seunghoon Lee and Kilian Frank and Bert Nickel and Min Liu and Johannes Lischner and Emiliano Cortés}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85192576803&doi=10.1038%2fs41467-024-47994-y&partnerID=40&md5=275dab6aa6f84f710ec1d1afe78e1679}, doi = {10.1038/s41467-024-47994-y}, issn = {20411723}, year = {2024}, date = {2024-01-01}, journal = {Nature Communications}, volume = {15}, number = {1}, publisher = {Nature Research}, abstract = {While the role of crystal facets is well known in traditional heterogeneous catalysis, this effect has not yet been thoroughly studied in plasmon-assisted catalysis, where attention has primarily focused on plasmon-derived mechanisms. Here, we investigate plasmon-assisted electrocatalytic CO2 reduction using different shapes of plasmonic Au nanoparticles - nanocube (NC), rhombic dodecahedron (RD), and octahedron (OC) - exposing 100, 110, and 111 facets, respectively. Upon plasmon excitation, Au OCs doubled CO Faradaic efficiency (FECO) and tripled CO partial current density (jCO) compared to a dark condition, with NCs also improving under illumination. In contrast, Au RDs maintained consistent performance irrespective of light exposure, suggesting minimal influence of light on the reaction. Temperature experiments ruled out heat as the main factor to explain such differences. Atomistic simulations and electromagnetic modeling revealed higher hot carrier abundance and electric field enhancement on Au OCs and NCs than RDs. These effects now dominate the reaction landscape over the crystal facets, thus shifting the reaction sites when comparing dark and plasmon-activated processes. Plasmon-assisted H2 evolution reaction experiments also support these findings. The dominance of low-coordinated sites over facets in plasmonic catalysis suggests key insights for designing efficient photocatalysts for energy conversion and carbon neutralization. © The Author(s) 2024.}, note = {Cited by: 0; All Open Access, Gold Open Access}, keywords = {}, pubstate = {published}, tppubtype = {article} } While the role of crystal facets is well known in traditional heterogeneous catalysis, this effect has not yet been thoroughly studied in plasmon-assisted catalysis, where attention has primarily focused on plasmon-derived mechanisms. Here, we investigate plasmon-assisted electrocatalytic CO2 reduction using different shapes of plasmonic Au nanoparticles - nanocube (NC), rhombic dodecahedron (RD), and octahedron (OC) - exposing 100, 110, and 111 facets, respectively. Upon plasmon excitation, Au OCs doubled CO Faradaic efficiency (FECO) and tripled CO partial current density (jCO) compared to a dark condition, with NCs also improving under illumination. In contrast, Au RDs maintained consistent performance irrespective of light exposure, suggesting minimal influence of light on the reaction. Temperature experiments ruled out heat as the main factor to explain such differences. Atomistic simulations and electromagnetic modeling revealed higher hot carrier abundance and electric field enhancement on Au OCs and NCs than RDs. These effects now dominate the reaction landscape over the crystal facets, thus shifting the reaction sites when comparing dark and plasmon-activated processes. Plasmon-assisted H2 evolution reaction experiments also support these findings. The dominance of low-coordinated sites over facets in plasmonic catalysis suggests key insights for designing efficient photocatalysts for energy conversion and carbon neutralization. © The Author(s) 2024. |
| 43. | Bienek, Oliver; Rieth, Tim; Kühne, Julius; Fuchs, Benedikt; Kuhl, Matthias; Wagner, Laura I; Todenhagen, Lina M; Wolz, Lukas; Henning, Alex; Sharp, Ian D: Suppressing substrate oxidation during plasma-enhanced atomic layer deposition on semiconductor surfaces. In: Applied Physics Letters, 124 (7), 2024, ISSN: 00036951, (Cited by: 0; All Open Access, Hybrid Gold Open Access). (Type: Journal Article | Abstract | Links | BibTeX) @article{Bienek2024, title = {Suppressing substrate oxidation during plasma-enhanced atomic layer deposition on semiconductor surfaces}, author = {Oliver Bienek and Tim Rieth and Julius Kühne and Benedikt Fuchs and Matthias Kuhl and Laura I Wagner and Lina M Todenhagen and Lukas Wolz and Alex Henning and Ian D Sharp}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85184995453&doi=10.1063%2f5.0182200&partnerID=40&md5=935ed758a1718e8963b335cb7d8ccae6}, doi = {10.1063/5.0182200}, issn = {00036951}, year = {2024}, date = {2024-01-01}, journal = {Applied Physics Letters}, volume = {124}, number = {7}, publisher = {American Institute of Physics Inc.}, abstract = {Plasma-enhanced atomic layer deposition (PE-ALD) is widely employed in microelectronics, energy, and sensing applications. Typically, PE-ALD processes for metal oxides utilize remote inductively coupled plasmas operated at powers of >200 W, ensuring a sufficient flux of oxygen radicals to the growth surface. However, this approach often leads to significant oxidation of chemically sensitive substrates, including most technological semiconductors. Here, we demonstrate that plasma powers as low as 5 W can effectively suppress substrate oxidation while maintaining the structural, optical, and electronic quality of the films. Specifically, we investigate the growth of titanium oxide (TiOx) using two commonly used metalorganic precursors, titanium isopropoxide and tetrakis(dimethylamino)titanium. Films deposited with 5 and 300 W oxygen plasma power are nearly indiscernible from one another, exhibiting significantly lower defect concentrations than those obtained from thermal ALD with H2O. The low plasma power process preserves desired physical characteristics of PE-ALD films, including large optical constants (n > 2.45 at 589 nm), negligible defect-induced sub-bandgap optical absorption (α < 102 cm−1), and high electrical resistivity (>105 Ω cm). Similar behavior, including suppressed interface oxidation and low defect content, is observed on both Si and InP substrates. As an example application of this approach, the assessment of InP/TiOx photocathodes and Si/TiOx photoanodes reveals a significant improvement in the photocurrent onset potential in both cases, enabled by suppressed substrate oxidation during low power PE-ALD. Overall, low power PE-ALD represents a generally applicable strategy for producing high quality metal oxide thin films while minimizing detrimental substrate reactions. © 2024 Author(s).}, note = {Cited by: 0; All Open Access, Hybrid Gold Open Access}, keywords = {}, pubstate = {published}, tppubtype = {article} } Plasma-enhanced atomic layer deposition (PE-ALD) is widely employed in microelectronics, energy, and sensing applications. Typically, PE-ALD processes for metal oxides utilize remote inductively coupled plasmas operated at powers of >200 W, ensuring a sufficient flux of oxygen radicals to the growth surface. However, this approach often leads to significant oxidation of chemically sensitive substrates, including most technological semiconductors. Here, we demonstrate that plasma powers as low as 5 W can effectively suppress substrate oxidation while maintaining the structural, optical, and electronic quality of the films. Specifically, we investigate the growth of titanium oxide (TiOx) using two commonly used metalorganic precursors, titanium isopropoxide and tetrakis(dimethylamino)titanium. Films deposited with 5 and 300 W oxygen plasma power are nearly indiscernible from one another, exhibiting significantly lower defect concentrations than those obtained from thermal ALD with H2O. The low plasma power process preserves desired physical characteristics of PE-ALD films, including large optical constants (n > 2.45 at 589 nm), negligible defect-induced sub-bandgap optical absorption (α < 102 cm−1), and high electrical resistivity (>105 Ω cm). Similar behavior, including suppressed interface oxidation and low defect content, is observed on both Si and InP substrates. As an example application of this approach, the assessment of InP/TiOx photocathodes and Si/TiOx photoanodes reveals a significant improvement in the photocurrent onset potential in both cases, enabled by suppressed substrate oxidation during low power PE-ALD. Overall, low power PE-ALD represents a generally applicable strategy for producing high quality metal oxide thin films while minimizing detrimental substrate reactions. © 2024 Author(s). |
| 44. | Sortino, Luca; Gale, Angus; Kühner, Lucca; Li, Chi; Biechteler, Jonas; Wendisch, Fedja J; Kianinia, Mehran; Ren, Haoran; Toth, Milos; Maier, Stefan A; Aharonovich, Igor; Tittl, Andreas: Optically addressable spin defects coupled to bound states in the continuum metasurfaces. In: Nature Communications, 15 (1), 2024, ISSN: 20411723, (Cited by: 3; All Open Access, Gold Open Access). (Type: Journal Article | Abstract | Links | BibTeX) @article{Sortino2024, title = {Optically addressable spin defects coupled to bound states in the continuum metasurfaces}, author = {Luca Sortino and Angus Gale and Lucca Kühner and Chi Li and Jonas Biechteler and Fedja J Wendisch and Mehran Kianinia and Haoran Ren and Milos Toth and Stefan A Maier and Igor Aharonovich and Andreas Tittl}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85186906047&doi=10.1038%2fs41467-024-46272-1&partnerID=40&md5=c9383a9c9df645054bd4c72a4bdc7041}, doi = {10.1038/s41467-024-46272-1}, issn = {20411723}, year = {2024}, date = {2024-01-01}, journal = {Nature Communications}, volume = {15}, number = {1}, publisher = {Nature Research}, abstract = {Van der Waals (vdW) materials, including hexagonal boron nitride (hBN), are layered crystalline solids with appealing properties for investigating light-matter interactions at the nanoscale. hBN has emerged as a versatile building block for nanophotonic structures, and the recent identification of native optically addressable spin defects has opened up exciting possibilities in quantum technologies. However, these defects exhibit relatively low quantum efficiencies and a broad emission spectrum, limiting potential applications. Optical metasurfaces present a novel approach to boost light emission efficiency, offering remarkable control over light-matter coupling at the sub-wavelength regime. Here, we propose and realise a monolithic scalable integration between intrinsic spin defects in hBN metasurfaces and high quality (Q) factor resonances, exceeding 102, leveraging quasi-bound states in the continuum (qBICs). Coupling between defect ensembles and qBIC resonances delivers a 25-fold increase in photoluminescence intensity, accompanied by spectral narrowing to below 4 nm linewidth and increased narrowband spin-readout efficiency. Our findings demonstrate a new class of metasurfaces for spin-defect-based technologies and pave the way towards vdW-based nanophotonic devices with enhanced efficiency and sensitivity for quantum applications in imaging, sensing, and light emission. © The Author(s) 2024.}, note = {Cited by: 3; All Open Access, Gold Open Access}, keywords = {}, pubstate = {published}, tppubtype = {article} } Van der Waals (vdW) materials, including hexagonal boron nitride (hBN), are layered crystalline solids with appealing properties for investigating light-matter interactions at the nanoscale. hBN has emerged as a versatile building block for nanophotonic structures, and the recent identification of native optically addressable spin defects has opened up exciting possibilities in quantum technologies. However, these defects exhibit relatively low quantum efficiencies and a broad emission spectrum, limiting potential applications. Optical metasurfaces present a novel approach to boost light emission efficiency, offering remarkable control over light-matter coupling at the sub-wavelength regime. Here, we propose and realise a monolithic scalable integration between intrinsic spin defects in hBN metasurfaces and high quality (Q) factor resonances, exceeding 102, leveraging quasi-bound states in the continuum (qBICs). Coupling between defect ensembles and qBIC resonances delivers a 25-fold increase in photoluminescence intensity, accompanied by spectral narrowing to below 4 nm linewidth and increased narrowband spin-readout efficiency. Our findings demonstrate a new class of metasurfaces for spin-defect-based technologies and pave the way towards vdW-based nanophotonic devices with enhanced efficiency and sensitivity for quantum applications in imaging, sensing, and light emission. © The Author(s) 2024. |
| 45. | Qu, Wenqiang; Xu, Zixiang; Gruber, Christoph G; Li, Hongmei; Hu, Xiaonan; Zhou, Limin; Duan, Haiyan; Zhang, Jin; Liu, Min; Cortés, Emiliano; Zhang, Dengsong: Accelerating Toluene Oxidation over Boron-Titanium-Oxygen Interface: Steric Hindrance of the Methyl Group Induced by the Plane-Adsorption Configuration. In: Environmental Science and Technology, 58 (36), pp. 16215 – 16224, 2024, ISSN: 0013936X, (Cited by: 0). (Type: Journal Article | Abstract | Links | BibTeX) @article{Qu202416215, title = {Accelerating Toluene Oxidation over Boron-Titanium-Oxygen Interface: Steric Hindrance of the Methyl Group Induced by the Plane-Adsorption Configuration}, author = {Wenqiang Qu and Zixiang Xu and Christoph G Gruber and Hongmei Li and Xiaonan Hu and Limin Zhou and Haiyan Duan and Jin Zhang and Min Liu and Emiliano Cortés and Dengsong Zhang}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85202652526&doi=10.1021%2facs.est.4c06079&partnerID=40&md5=cec430551f771a82af143f79e06bf386}, doi = {10.1021/acs.est.4c06079}, issn = {0013936X}, year = {2024}, date = {2024-01-01}, journal = {Environmental Science and Technology}, volume = {58}, number = {36}, pages = {16215 – 16224}, publisher = {American Chemical Society}, abstract = {Elimination of dilute gaseous toluene is one of the critical concerns within the field of indoor air remediation. The typical degradation route on titanium-based catalysts, “toluene-benzaldehyde-carbon dioxide”, necessitates the oxidation of the methyl group as a prerequisite for photocatalytic toluene oxidation. However, the inherent planar adsorption configuration of toluene molecules, dominated by the benzene rings, leads to significant steric hindrance for the methyl group. This steric hindrance prevents the methyl group from contacting the active species on the catalyst surface, thereby limiting the removal of toluene under indoor conditions. To date, no effective strategy to control the steric hindrance of the methyl group has been identified. Herein, we showed a B-Ti-O interface that exhibits significantly enhanced toluene removal efficiency under indoor conditions. In-depth investigations revealed that, compared to typical Ti-based photocatalysts, the steric hindrance between the methyl group and the catalyst surface decreased from 3.42 to 3.03 Å on the designed interface. This reduction originates from the matching of orbital energy levels between Ti 3dz2 and C 2pz of the benzene ring. The decreased steric hindrance improved the efficiency of toluene being attacked by surface active species, allowing for rapid conversion into benzaldehyde and benzoic acid species for subsequent reactions. Our work provides novel insights into the steric hindrance effect in the elimination of aromatic volatile organic compounds. © 2024 American Chemical Society.}, note = {Cited by: 0}, keywords = {}, pubstate = {published}, tppubtype = {article} } Elimination of dilute gaseous toluene is one of the critical concerns within the field of indoor air remediation. The typical degradation route on titanium-based catalysts, “toluene-benzaldehyde-carbon dioxide”, necessitates the oxidation of the methyl group as a prerequisite for photocatalytic toluene oxidation. However, the inherent planar adsorption configuration of toluene molecules, dominated by the benzene rings, leads to significant steric hindrance for the methyl group. This steric hindrance prevents the methyl group from contacting the active species on the catalyst surface, thereby limiting the removal of toluene under indoor conditions. To date, no effective strategy to control the steric hindrance of the methyl group has been identified. Herein, we showed a B-Ti-O interface that exhibits significantly enhanced toluene removal efficiency under indoor conditions. In-depth investigations revealed that, compared to typical Ti-based photocatalysts, the steric hindrance between the methyl group and the catalyst surface decreased from 3.42 to 3.03 Å on the designed interface. This reduction originates from the matching of orbital energy levels between Ti 3dz2 and C 2pz of the benzene ring. The decreased steric hindrance improved the efficiency of toluene being attacked by surface active species, allowing for rapid conversion into benzaldehyde and benzoic acid species for subsequent reactions. Our work provides novel insights into the steric hindrance effect in the elimination of aromatic volatile organic compounds. © 2024 American Chemical Society. |
| 46. | Bartolomei, Beatrice; Sbacchi, Maria; Rosso, Cristian; Günay-Gürer, Ayse; Zdražil, Lukáš; Cadranel, Alejandro; Kralj, Slavko; Guldi, Dirk M; Prato, Maurizio: Synthetic Strategies for the Selective Functionalization of Carbon Nanodots Allow Optically Communicating Suprastructures. In: Angewandte Chemie - International Edition, 63 (5), 2024, ISSN: 14337851, (Cited by: 3; All Open Access, Hybrid Gold Open Access). (Type: Journal Article | Abstract | Links | BibTeX) @article{Bartolomei2024, title = {Synthetic Strategies for the Selective Functionalization of Carbon Nanodots Allow Optically Communicating Suprastructures}, author = {Beatrice Bartolomei and Maria Sbacchi and Cristian Rosso and Ayse Günay-Gürer and Lukáš Zdražil and Alejandro Cadranel and Slavko Kralj and Dirk M Guldi and Maurizio Prato}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85180731101&doi=10.1002%2fanie.202316915&partnerID=40&md5=9010c5533b14b0b5dd1e65363c1a5a4a}, doi = {10.1002/anie.202316915}, issn = {14337851}, year = {2024}, date = {2024-01-01}, journal = {Angewandte Chemie - International Edition}, volume = {63}, number = {5}, publisher = {John Wiley and Sons Inc}, abstract = {The surface of Carbon Nanodots (CNDs) stands as a rich chemical platform, able to regulate the interactions between particles and external species. Performing selective functionalization of these nanoscale entities is of practical importance, however, it still represents a considerable challenge. In this work, we exploited the organic chemistry toolbox to install target functionalities on the CND surface, while monitoring the chemical changes on the material's outer shell through nuclear magnetic resonance spectroscopy. Following this, we investigated the use of click chemistry to covalently connect CNDs of different nature en-route towards covalent suprastructures with unprecedent molecular control. The different photophysical properties of the connected particles allowed their optical communication in the excited state. This work paves the way for the development of selective and addressable CND building blocks which can act as modular nanoscale synthons that mirror the long-established reactivity of molecular organic synthesis. © 2023 The Authors. Angewandte Chemie International Edition published by Wiley-VCH GmbH.}, note = {Cited by: 3; All Open Access, Hybrid Gold Open Access}, keywords = {}, pubstate = {published}, tppubtype = {article} } The surface of Carbon Nanodots (CNDs) stands as a rich chemical platform, able to regulate the interactions between particles and external species. Performing selective functionalization of these nanoscale entities is of practical importance, however, it still represents a considerable challenge. In this work, we exploited the organic chemistry toolbox to install target functionalities on the CND surface, while monitoring the chemical changes on the material's outer shell through nuclear magnetic resonance spectroscopy. Following this, we investigated the use of click chemistry to covalently connect CNDs of different nature en-route towards covalent suprastructures with unprecedent molecular control. The different photophysical properties of the connected particles allowed their optical communication in the excited state. This work paves the way for the development of selective and addressable CND building blocks which can act as modular nanoscale synthons that mirror the long-established reactivity of molecular organic synthesis. © 2023 The Authors. Angewandte Chemie International Edition published by Wiley-VCH GmbH. |
| 47. | Schneider, Tilman; Seebauer, Florian; Beuerle, Florian; Würthner, Frank: A Monodisperse, End-Capped Ru(bda) Oligomer with Outstanding Performance in Heterogeneous Electrochemical Water Oxidation. In: Advanced Materials Technologies, 9 (11), 2024, ISSN: 2365709X, (Cited by: 1; All Open Access, Hybrid Gold Open Access). (Type: Journal Article | Abstract | Links | BibTeX) @article{Schneider2024, title = {A Monodisperse, End-Capped Ru(bda) Oligomer with Outstanding Performance in Heterogeneous Electrochemical Water Oxidation}, author = {Tilman Schneider and Florian Seebauer and Florian Beuerle and Frank Würthner}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85181252987&doi=10.1002%2fadmt.202301721&partnerID=40&md5=9c7edafdf201526afcd83f0d7a6d5410}, doi = {10.1002/admt.202301721}, issn = {2365709X}, year = {2024}, date = {2024-01-01}, journal = {Advanced Materials Technologies}, volume = {9}, number = {11}, publisher = {John Wiley and Sons Inc}, abstract = {Water oxidation catalysis is a key step for sustainable fuel production by water splitting into hydrogen and oxygen. The synthesis of a novel coordination oligomer based on four Ru(bda) (bda = 2,2′-bipyridine-6,6′-dicarboxylate) centers, three 4,4′-bipyridine (4,4′-bpy) linkers, and two 4-picoline (4-pic) end caps is reported. The monodispersity of this tetranuclear compound is characterized by NMR techniques. Heterogeneous electrochemical water oxidation after immobilization on multi-walled carbon nanotubes (MWCNTs) shows catalytic performance unprecedented for this compound class, with a turnover frequency (TOF) of 133 s−1 and a turnover number (TON) of 4.89 × 106, at a current density of 43.8 mA cm−2 and a potential of 1.45 V versus normal hydrogen electrode (NHE). © 2024 The Authors. Advanced Materials Technologies published by Wiley-VCH GmbH.}, note = {Cited by: 1; All Open Access, Hybrid Gold Open Access}, keywords = {}, pubstate = {published}, tppubtype = {article} } Water oxidation catalysis is a key step for sustainable fuel production by water splitting into hydrogen and oxygen. The synthesis of a novel coordination oligomer based on four Ru(bda) (bda = 2,2′-bipyridine-6,6′-dicarboxylate) centers, three 4,4′-bipyridine (4,4′-bpy) linkers, and two 4-picoline (4-pic) end caps is reported. The monodispersity of this tetranuclear compound is characterized by NMR techniques. Heterogeneous electrochemical water oxidation after immobilization on multi-walled carbon nanotubes (MWCNTs) shows catalytic performance unprecedented for this compound class, with a turnover frequency (TOF) of 133 s−1 and a turnover number (TON) of 4.89 × 106, at a current density of 43.8 mA cm−2 and a potential of 1.45 V versus normal hydrogen electrode (NHE). © 2024 The Authors. Advanced Materials Technologies published by Wiley-VCH GmbH. |
| 48. | Guo, Renjun; Xiong, Qiu; Ulatowski, Aleksander; Li, Saisai; Ding, Zijin; Xiao, Tianxiao; Liang, Suzhe; Heger, Julian E; Guan, Tianfu; Jiang, Xinyu; Sun, Kun; Reb, Lennart K; Reus, Manuel A; Chumakov, Andrei; Schwartzkopf, Matthias; Yuan, Minjian; Hou, Yi; Roth, Stephan V; Herz, Laura M; Gao, Peng; Müller-Buschbaum, Peter: Trace Water in Lead Iodide Affecting Perovskite Crystal Nucleation Limits the Performance of Perovskite Solar Cells. In: Advanced Materials, 36 (7), 2024, ISSN: 09359648, (Cited by: 15; All Open Access, Hybrid Gold Open Access). (Type: Journal Article | Abstract | Links | BibTeX) @article{Guo2024, title = {Trace Water in Lead Iodide Affecting Perovskite Crystal Nucleation Limits the Performance of Perovskite Solar Cells}, author = {Renjun Guo and Qiu Xiong and Aleksander Ulatowski and Saisai Li and Zijin Ding and Tianxiao Xiao and Suzhe Liang and Julian E Heger and Tianfu Guan and Xinyu Jiang and Kun Sun and Lennart K Reb and Manuel A Reus and Andrei Chumakov and Matthias Schwartzkopf and Minjian Yuan and Yi Hou and Stephan V Roth and Laura M Herz and Peng Gao and Peter Müller-Buschbaum}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85178892866&doi=10.1002%2fadma.202310237&partnerID=40&md5=e15f49722f921e4ced782115980d3dab}, doi = {10.1002/adma.202310237}, issn = {09359648}, year = {2024}, date = {2024-01-01}, journal = {Advanced Materials}, volume = {36}, number = {7}, publisher = {John Wiley and Sons Inc}, abstract = {The experimental replicability of highly efficient perovskite solar cells (PSCs) is a persistent challenge faced by laboratories worldwide. Although trace impurities in raw materials can impact the experimental reproducibility of high-performance PSCs, the in situ study of how trace impurities affect perovskite film growth is never investigated. Here, light is shed on the impact of inevitable water contamination in lead iodide (PbI2) on the replicability of device performance, mainly depending on the synthesis methods of PbI2. Through synchrotron-based structure characterization, it is uncovered that even slight additions of water to PbI2 accelerate the crystallization process in the perovskite layer during annealing. However, this accelerated crystallization also results in an imbalance of charge-carrier mobilities, leading to a degradation in device performance and reduced longevity of the solar cells. It is also found that anhydrous PbI2 promotes a homogenous nucleation process and improves perovskite film growth. Finally, the PSCs achieve a remarkable certified power conversion efficiency of 24.3%. This breakthrough demonstrates the significance of understanding and precisely managing the water content in PbI2 to ensure the experimental replicability of high-efficiency PSCs. © 2023 The Authors. Advanced Materials published by Wiley-VCH GmbH.}, note = {Cited by: 15; All Open Access, Hybrid Gold Open Access}, keywords = {}, pubstate = {published}, tppubtype = {article} } The experimental replicability of highly efficient perovskite solar cells (PSCs) is a persistent challenge faced by laboratories worldwide. Although trace impurities in raw materials can impact the experimental reproducibility of high-performance PSCs, the in situ study of how trace impurities affect perovskite film growth is never investigated. Here, light is shed on the impact of inevitable water contamination in lead iodide (PbI2) on the replicability of device performance, mainly depending on the synthesis methods of PbI2. Through synchrotron-based structure characterization, it is uncovered that even slight additions of water to PbI2 accelerate the crystallization process in the perovskite layer during annealing. However, this accelerated crystallization also results in an imbalance of charge-carrier mobilities, leading to a degradation in device performance and reduced longevity of the solar cells. It is also found that anhydrous PbI2 promotes a homogenous nucleation process and improves perovskite film growth. Finally, the PSCs achieve a remarkable certified power conversion efficiency of 24.3%. This breakthrough demonstrates the significance of understanding and precisely managing the water content in PbI2 to ensure the experimental replicability of high-efficiency PSCs. © 2023 The Authors. Advanced Materials published by Wiley-VCH GmbH. |
| 49. | Boggiano, Hilario D; Nan, Lin; Grinblat, Gustavo; Maier, Stefan A; Cortés, Emiliano; Bragas, Andrea V: Focusing Surface Acoustic Waves with a Plasmonic Hypersonic Lens. In: Nano Letters, 24 (21), pp. 6362 – 6368, 2024, ISSN: 15306984, (Cited by: 1; All Open Access, Green Open Access). (Type: Journal Article | Abstract | Links | BibTeX) @article{Boggiano20246362, title = {Focusing Surface Acoustic Waves with a Plasmonic Hypersonic Lens}, author = {Hilario D Boggiano and Lin Nan and Gustavo Grinblat and Stefan A Maier and Emiliano Cortés and Andrea V Bragas}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85193514427&doi=10.1021%2facs.nanolett.4c01251&partnerID=40&md5=3ea1994a8774267df4aee72565ffc413}, doi = {10.1021/acs.nanolett.4c01251}, issn = {15306984}, year = {2024}, date = {2024-01-01}, journal = {Nano Letters}, volume = {24}, number = {21}, pages = {6362 – 6368}, publisher = {American Chemical Society}, abstract = {Plasmonic nanoantennas have proven to be efficient transducers of electromagnetic to mechanical energy and vice versa. The sudden thermal expansion of these structures after an ultrafast optical pulsed excitation leads to the emission of hypersonic acoustic waves to the supporting substrate, which can be detected by another antenna that acts as a high-sensitivity mechanical probe due to the strong modulation of its optical response. Here, we propose and experimentally demonstrate a nanoscale acoustic lens comprised of 11 gold nanodisks whose collective oscillation at gigahertz frequencies gives rise to an interference pattern that results in a diffraction-limited surface acoustic beam of about 340 nm width, with an amplitude contrast of 60%. Via spatially decoupled pump-probe experiments, we were able to map the radiated acoustic energy in the proximity of the focal area, obtaining a very good agreement with the continuum elastic theory. © 2024 American Chemical Society.}, note = {Cited by: 1; All Open Access, Green Open Access}, keywords = {}, pubstate = {published}, tppubtype = {article} } Plasmonic nanoantennas have proven to be efficient transducers of electromagnetic to mechanical energy and vice versa. The sudden thermal expansion of these structures after an ultrafast optical pulsed excitation leads to the emission of hypersonic acoustic waves to the supporting substrate, which can be detected by another antenna that acts as a high-sensitivity mechanical probe due to the strong modulation of its optical response. Here, we propose and experimentally demonstrate a nanoscale acoustic lens comprised of 11 gold nanodisks whose collective oscillation at gigahertz frequencies gives rise to an interference pattern that results in a diffraction-limited surface acoustic beam of about 340 nm width, with an amplitude contrast of 60%. Via spatially decoupled pump-probe experiments, we were able to map the radiated acoustic energy in the proximity of the focal area, obtaining a very good agreement with the continuum elastic theory. © 2024 American Chemical Society. |
| 50. | Streibel, Verena; Schönecker, Johanna L; Wagner, Laura I; Sirotti, Elise; Munnik, Frans; Kuhl, Matthias; Jiang, Chang-Ming; Eichhorn, Johanna; Santra, Saswati; Sharp, Ian D: Zirconium Oxynitride Thin Films for Photoelectrochemical Water Splitting. In: ACS Applied Energy Materials, 7 (9), pp. 4004 – 4015, 2024, ISSN: 25740962, (Cited by: 1; All Open Access, Hybrid Gold Open Access). (Type: Journal Article | Abstract | Links | BibTeX) @article{Streibel20244004, title = {Zirconium Oxynitride Thin Films for Photoelectrochemical Water Splitting}, author = {Verena Streibel and Johanna L Schönecker and Laura I Wagner and Elise Sirotti and Frans Munnik and Matthias Kuhl and Chang-Ming Jiang and Johanna Eichhorn and Saswati Santra and Ian D Sharp}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85192135302&doi=10.1021%2facsaem.4c00303&partnerID=40&md5=d80c2a5898a81af879366dbf20e5afda}, doi = {10.1021/acsaem.4c00303}, issn = {25740962}, year = {2024}, date = {2024-01-01}, journal = {ACS Applied Energy Materials}, volume = {7}, number = {9}, pages = {4004 – 4015}, publisher = {American Chemical Society}, abstract = {Transition metal oxynitrides are a promising class of functional materials for photoelectrochemical (PEC) applications. Although these compounds are most commonly synthesized via ammonolysis of oxide precursors, such synthetic routes often lead to poorly controlled oxygen-to-nitrogen anion ratios, and the harsh nitridation conditions are incompatible with many substrates, including transparent conductive oxides. Here, we report direct reactive sputter deposition of a family of zirconium oxynitride thin films and the comprehensive characterization of their tunable structural, optical, and functional PEC properties. Systematic increases of the oxygen content in the reactive sputter gas mixture enable access to different crystalline structures within the zirconium oxynitride family. Increasing oxygen contents lead to a transition from metallic to semiconducting to insulating phases. In particular, crystalline Zr2ON2-like films have band gaps in the UV-visible range and are n-type semiconductors. These properties, together with a valence band maximum position located favorably relative to the water oxidation potential, make them viable photoanode candidates. Using chopped linear sweep voltammetry, we indeed confirm that our Zr2ON2 films are PEC-active for the oxygen evolution reaction in alkaline electrolytes. We further show that high-vacuum annealing boosts their PEC performance characteristics. Although the observed photocurrents are low compared to state-of-the-art photoanodes, these dense and planar thin films can offer a valuable platform for studying oxynitride photoelectrodes, as well as for future nanostructuring, band gap engineering, and defect engineering efforts. © 2024 The Authors. Published by American Chemical Society.}, note = {Cited by: 1; All Open Access, Hybrid Gold Open Access}, keywords = {}, pubstate = {published}, tppubtype = {article} } Transition metal oxynitrides are a promising class of functional materials for photoelectrochemical (PEC) applications. Although these compounds are most commonly synthesized via ammonolysis of oxide precursors, such synthetic routes often lead to poorly controlled oxygen-to-nitrogen anion ratios, and the harsh nitridation conditions are incompatible with many substrates, including transparent conductive oxides. Here, we report direct reactive sputter deposition of a family of zirconium oxynitride thin films and the comprehensive characterization of their tunable structural, optical, and functional PEC properties. Systematic increases of the oxygen content in the reactive sputter gas mixture enable access to different crystalline structures within the zirconium oxynitride family. Increasing oxygen contents lead to a transition from metallic to semiconducting to insulating phases. In particular, crystalline Zr2ON2-like films have band gaps in the UV-visible range and are n-type semiconductors. These properties, together with a valence band maximum position located favorably relative to the water oxidation potential, make them viable photoanode candidates. Using chopped linear sweep voltammetry, we indeed confirm that our Zr2ON2 films are PEC-active for the oxygen evolution reaction in alkaline electrolytes. We further show that high-vacuum annealing boosts their PEC performance characteristics. Although the observed photocurrents are low compared to state-of-the-art photoanodes, these dense and planar thin films can offer a valuable platform for studying oxynitride photoelectrodes, as well as for future nanostructuring, band gap engineering, and defect engineering efforts. © 2024 The Authors. Published by American Chemical Society. |
| 51. | Christis, Maximilian; Henning, Alex; Bartl, Johannes D; Zeidler, Andreas; Rieger, Bernhard; Stutzmann, Martin; Sharp, Ian D: Annealing-Free Ohmic Contacts to n-Type GaN via Hydrogen Plasma-Assisted Atomic Layer Deposition of Sub-Nanometer AlOx. In: Advanced Materials Interfaces, 11 (4), 2024, ISSN: 21967350, (Cited by: 0; All Open Access, Gold Open Access). (Type: Journal Article | Abstract | Links | BibTeX) @article{Christis2024, title = {Annealing-Free Ohmic Contacts to n-Type GaN via Hydrogen Plasma-Assisted Atomic Layer Deposition of Sub-Nanometer AlOx}, author = {Maximilian Christis and Alex Henning and Johannes D Bartl and Andreas Zeidler and Bernhard Rieger and Martin Stutzmann and Ian D Sharp}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85178238869&doi=10.1002%2fadmi.202300758&partnerID=40&md5=71aea20b37752d132e7c3d0aa31e097f}, doi = {10.1002/admi.202300758}, issn = {21967350}, year = {2024}, date = {2024-01-01}, journal = {Advanced Materials Interfaces}, volume = {11}, number = {4}, publisher = {John Wiley and Sons Inc}, abstract = {A plasma-assisted atomic layer deposition (PE-ALD) process is reported for creating ohmic contacts to n-type GaN that combines native oxide reduction, near-surface doping, and encapsulation of GaN in a single processing step, thereby eliminating the need for both wet chemical etching of the native oxide before metallization and thermal annealing after contact formation. Repeated ALD cycling of trimethyl aluminum (TMA) and high-intensity hydrogen (H2) plasma results in the deposition of a sub-nanometer-thin (≈8 Å) AlOx layer via the partial transformation of the GaN surface oxide into AlOx. Hydrogen plasma-induced nitrogen vacancies in the near-surface region of GaN serve as shallow donors, promoting efficient out-of-plane electrical transport. Subsequent metallization with a Ti/Al/Ti/Au stack results in low contact resistance, ohmic behavior, and smooth morphology without requiring annealing. This electrical contracting approach thus meets the thermal budget requirements for Si-based complementary metal–oxide–semiconductor structures and can facilitate the design and fabrication of advanced GaN-on-Si heterodevices. © 2023 The Authors. Advanced Materials Interfaces published by Wiley-VCH GmbH.}, note = {Cited by: 0; All Open Access, Gold Open Access}, keywords = {}, pubstate = {published}, tppubtype = {article} } A plasma-assisted atomic layer deposition (PE-ALD) process is reported for creating ohmic contacts to n-type GaN that combines native oxide reduction, near-surface doping, and encapsulation of GaN in a single processing step, thereby eliminating the need for both wet chemical etching of the native oxide before metallization and thermal annealing after contact formation. Repeated ALD cycling of trimethyl aluminum (TMA) and high-intensity hydrogen (H2) plasma results in the deposition of a sub-nanometer-thin (≈8 Å) AlOx layer via the partial transformation of the GaN surface oxide into AlOx. Hydrogen plasma-induced nitrogen vacancies in the near-surface region of GaN serve as shallow donors, promoting efficient out-of-plane electrical transport. Subsequent metallization with a Ti/Al/Ti/Au stack results in low contact resistance, ohmic behavior, and smooth morphology without requiring annealing. This electrical contracting approach thus meets the thermal budget requirements for Si-based complementary metal–oxide–semiconductor structures and can facilitate the design and fabrication of advanced GaN-on-Si heterodevices. © 2023 The Authors. Advanced Materials Interfaces published by Wiley-VCH GmbH. |
| 52. | Alam, Shahidul; Aldosari, Haya; Petoukhoff, Christopher E; Váry, Tomáš; Althobaiti, Wejdan; Alqurashi, Maryam; Tang, Hua; Khan, Jafar I; Nádaždy, Vojtech; Müller-Buschbaum, Peter; Welch, Gregory C; Laquai, Frédéric: Thermally-Induced Degradation in PM6:Y6-Based Bulk Heterojunction Organic Solar Cells. In: Advanced Functional Materials, 34 (6), 2024, ISSN: 1616301X, (Cited by: 5). (Type: Journal Article | Abstract | Links | BibTeX) @article{Alam2024b, title = {Thermally-Induced Degradation in PM6:Y6-Based Bulk Heterojunction Organic Solar Cells}, author = {Shahidul Alam and Haya Aldosari and Christopher E Petoukhoff and Tomáš Váry and Wejdan Althobaiti and Maryam Alqurashi and Hua Tang and Jafar I Khan and Vojtech Nádaždy and Peter Müller-Buschbaum and Gregory C Welch and Frédéric Laquai}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85174907866&doi=10.1002%2fadfm.202308076&partnerID=40&md5=48034adbebe4c83aacea2669a2ffd91b}, doi = {10.1002/adfm.202308076}, issn = {1616301X}, year = {2024}, date = {2024-01-01}, journal = {Advanced Functional Materials}, volume = {34}, number = {6}, publisher = {John Wiley and Sons Inc}, abstract = {Thermally induced degradation of organic photovoltaic devices hinders the commercialization of this emerging PV technology. Thus, a precise understanding of the origin of thermal device instability, as well as identifying strategies to circumvent degradation is of utmost importance. Here, it investigates thermally-induced degradation of state-of-the-art PBDB-T-2F (PM6):BTP (Y6) bulk heterojunction solar cells at different temperatures and reveal changes of their optical properties, photophysics, and morphology. The open-circuit voltage and fill factor of thermally degraded devices are limited by dissociation and charge collection efficiency differences, while the short-circuit current density is only slightly affected. Energy-resolved electrochemical impedance spectroscopy measurements reveal that thermally degraded samples exhibit a higher energy barrier for the charge-transfer state to charge-separated state conversion. Furthermore, the field dependence of charge generation, recombination, and extraction are studied by time-delayed collection field and transient photocurrent and photovoltage experiments, indicating significant bimolecular recombination limits device performance. Finally, coupled optical-electrical device simulations are conducted to fit the devices’ current-voltage characteristics, enabling us to find useful correlations between optical and electrical properties of the active layers and device performance parameters. © 2023 Wiley-VCH GmbH.}, note = {Cited by: 5}, keywords = {}, pubstate = {published}, tppubtype = {article} } Thermally induced degradation of organic photovoltaic devices hinders the commercialization of this emerging PV technology. Thus, a precise understanding of the origin of thermal device instability, as well as identifying strategies to circumvent degradation is of utmost importance. Here, it investigates thermally-induced degradation of state-of-the-art PBDB-T-2F (PM6):BTP (Y6) bulk heterojunction solar cells at different temperatures and reveal changes of their optical properties, photophysics, and morphology. The open-circuit voltage and fill factor of thermally degraded devices are limited by dissociation and charge collection efficiency differences, while the short-circuit current density is only slightly affected. Energy-resolved electrochemical impedance spectroscopy measurements reveal that thermally degraded samples exhibit a higher energy barrier for the charge-transfer state to charge-separated state conversion. Furthermore, the field dependence of charge generation, recombination, and extraction are studied by time-delayed collection field and transient photocurrent and photovoltage experiments, indicating significant bimolecular recombination limits device performance. Finally, coupled optical-electrical device simulations are conducted to fit the devices’ current-voltage characteristics, enabling us to find useful correlations between optical and electrical properties of the active layers and device performance parameters. © 2023 Wiley-VCH GmbH. |
| 53. | Li, Chaohui; Zhang, Kaicheng; Maiti, Santanu; Peng, Zijian; Tian, Jingjing; Park, Hyoungwon; Byun, Jiwon; Xie, Zhiqiang; Dong, Lirong; Qiu, Shudi; Bornschlegl, Andreas J; Liu, Chao; Zhang, Jiyun; Osvet, Andres; Heumueller, Thomas; Christiansen, Silke H; Halik, Marcus; Unruh, Tobias; Li, Ning; Lüer, Larry; Brabec, Christoph J: Tailoring the Dimensionality of 2D/3D Heterojunctions for Inverted Perovskite Solar Cells. In: ACS Energy Letters, 9 (3), pp. 779 – 788, 2024, ISSN: 23808195, (Cited by: 1). (Type: Journal Article | Abstract | Links | BibTeX) @article{Li2024779, title = {Tailoring the Dimensionality of 2D/3D Heterojunctions for Inverted Perovskite Solar Cells}, author = {Chaohui Li and Kaicheng Zhang and Santanu Maiti and Zijian Peng and Jingjing Tian and Hyoungwon Park and Jiwon Byun and Zhiqiang Xie and Lirong Dong and Shudi Qiu and Andreas J Bornschlegl and Chao Liu and Jiyun Zhang and Andres Osvet and Thomas Heumueller and Silke H Christiansen and Marcus Halik and Tobias Unruh and Ning Li and Larry Lüer and Christoph J Brabec}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85184934047&doi=10.1021%2facsenergylett.4c00045&partnerID=40&md5=c38ab972feb0d23e4f5b0a8b69cda29d}, doi = {10.1021/acsenergylett.4c00045}, issn = {23808195}, year = {2024}, date = {2024-01-01}, journal = {ACS Energy Letters}, volume = {9}, number = {3}, pages = {779 – 788}, publisher = {American Chemical Society}, abstract = {Interface engineering is crucial to achieving stable perovskite photovoltaic devices. A versatile approach is developed to tailor interface properties via integrating co-assembled monolayers (co-SAMs) at the p-type buried interface and by capping a two-dimensional (2D) perovskite layer at the n-type upper interface with vacuum quenching. Optimized co-SAMs promote the coverage of the hole transport layer, significantly reducing the incidence of leakage currents. Based on this foundation, we develop damp-heat-stable perovskite solar cells by precisely tailoring the fragments of 2D perovskite layers through vacuum annealing with phenethylammonium iodide. An impressive open-circuit voltage of 1.216 V is achieved, corresponding to 92% of the value determined by the detailed-balance limit, along with a power conversion efficiency of 23.68%. Ultimately, integrating co-SAMs and the vacuum-assisted annealing fabricated devices maintain 96% and 80% of initial efficiencies after 1200 and 500 h of tracking at a maximum power point under 55 and 85 °C, respectively. © 2024 American Chemical Society}, note = {Cited by: 1}, keywords = {}, pubstate = {published}, tppubtype = {article} } Interface engineering is crucial to achieving stable perovskite photovoltaic devices. A versatile approach is developed to tailor interface properties via integrating co-assembled monolayers (co-SAMs) at the p-type buried interface and by capping a two-dimensional (2D) perovskite layer at the n-type upper interface with vacuum quenching. Optimized co-SAMs promote the coverage of the hole transport layer, significantly reducing the incidence of leakage currents. Based on this foundation, we develop damp-heat-stable perovskite solar cells by precisely tailoring the fragments of 2D perovskite layers through vacuum annealing with phenethylammonium iodide. An impressive open-circuit voltage of 1.216 V is achieved, corresponding to 92% of the value determined by the detailed-balance limit, along with a power conversion efficiency of 23.68%. Ultimately, integrating co-SAMs and the vacuum-assisted annealing fabricated devices maintain 96% and 80% of initial efficiencies after 1200 and 500 h of tracking at a maximum power point under 55 and 85 °C, respectively. © 2024 American Chemical Society |
| 54. | Kahl, Robert T; Erhardt, Andreas; Krauss, Gert; Seibold, Ferdinand; Dolynchuk, Oleksandr; Thelakkat, Mukundan; Thurn-Albrecht, Thomas: Effect of Chemical Modification on Molecular Ordering in Polydiketopyrrolopyrrole Copolymers: From Liquid Crystalline to Crystalline. In: Macromolecules, 57 (11), pp. 5243 – 5252, 2024, ISSN: 00249297, (Cited by: 0; All Open Access, Hybrid Gold Open Access). (Type: Journal Article | Abstract | Links | BibTeX) @article{Kahl20245243, title = {Effect of Chemical Modification on Molecular Ordering in Polydiketopyrrolopyrrole Copolymers: From Liquid Crystalline to Crystalline}, author = {Robert T Kahl and Andreas Erhardt and Gert Krauss and Ferdinand Seibold and Oleksandr Dolynchuk and Mukundan Thelakkat and Thomas Thurn-Albrecht}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85194953005&doi=10.1021%2facs.macromol.4c00264&partnerID=40&md5=82aa8c2a94c2415ef37525be97f91421}, doi = {10.1021/acs.macromol.4c00264}, issn = {00249297}, year = {2024}, date = {2024-01-01}, journal = {Macromolecules}, volume = {57}, number = {11}, pages = {5243 – 5252}, publisher = {American Chemical Society}, abstract = {The chemical architecture of conjugated polymers is often designed by contemplating and understanding the consequences of structural changes on electronic properties at the molecular level. However, even minor changes to the chemical structure of a polymer can significantly influence the packing arrangement, which also influences the electronic properties of the bulk material. Here, we investigate the molecular arrangement in the ordered state at room temperature of a series of three different polydiketopyrrolopyrroles (PDPPs) in bulk and oriented thin films in detail by wide-angle X-ray scattering and by atomic force microscopy. The changes in the chemical structure of the investigated PDPPs, namely, an additional side chain or a different flanking unit, lead to an increase in long-range order and thereby to a change in the phase state from sanidic ordered via sanidic rectangular or oblique to crystalline. © 2024 The Authors. Published by American Chemical Society.}, note = {Cited by: 0; All Open Access, Hybrid Gold Open Access}, keywords = {}, pubstate = {published}, tppubtype = {article} } The chemical architecture of conjugated polymers is often designed by contemplating and understanding the consequences of structural changes on electronic properties at the molecular level. However, even minor changes to the chemical structure of a polymer can significantly influence the packing arrangement, which also influences the electronic properties of the bulk material. Here, we investigate the molecular arrangement in the ordered state at room temperature of a series of three different polydiketopyrrolopyrroles (PDPPs) in bulk and oriented thin films in detail by wide-angle X-ray scattering and by atomic force microscopy. The changes in the chemical structure of the investigated PDPPs, namely, an additional side chain or a different flanking unit, lead to an increase in long-range order and thereby to a change in the phase state from sanidic ordered via sanidic rectangular or oblique to crystalline. © 2024 The Authors. Published by American Chemical Society. |
| 55. | Walther, Luis; Radacki, Krzysztof; Dewhurst, Rian D; Bertermann, Rüdiger; Finze, Maik; Braunschweig, Holger: All-Inorganic sp-Chain Ligands: Isoelectronic B/N Analogues of E. O. Fischer's Alkynylcarbynes. In: Angewandte Chemie - International Edition, 63 (30), 2024, ISSN: 14337851, (Cited by: 0). (Type: Journal Article | Abstract | Links | BibTeX) @article{Walther2024, title = {All-Inorganic sp-Chain Ligands: Isoelectronic B/N Analogues of E. O. Fischer's Alkynylcarbynes}, author = {Luis Walther and Krzysztof Radacki and Rian D Dewhurst and Rüdiger Bertermann and Maik Finze and Holger Braunschweig}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85196487754&doi=10.1002%2fanie.202404930&partnerID=40&md5=a3b7b1e54e914af660cef048fba965c1}, doi = {10.1002/anie.202404930}, issn = {14337851}, year = {2024}, date = {2024-01-01}, journal = {Angewandte Chemie - International Edition}, volume = {63}, number = {30}, publisher = {John Wiley and Sons Inc}, abstract = {Borylation of a tungsten-bound N2 ligand and halide abstraction provides access to a cationic complex with an unprecedented linear NNBR ligand. This complex undergoes [3+2] cycloaddition with azides, and an unexpected chain-extension reaction with an iminoborane, leading to a complex with a five-atom B/N chain. These two [NNBR]-containing complexes, inorganic analogues of E. O. Fischer's alkynylcarbynes, are very rare examples of molecules containing all-inorganic chains of sp-hybridized atoms. © 2024 Wiley-VCH GmbH.}, note = {Cited by: 0}, keywords = {}, pubstate = {published}, tppubtype = {article} } Borylation of a tungsten-bound N2 ligand and halide abstraction provides access to a cationic complex with an unprecedented linear NNBR ligand. This complex undergoes [3+2] cycloaddition with azides, and an unexpected chain-extension reaction with an iminoborane, leading to a complex with a five-atom B/N chain. These two [NNBR]-containing complexes, inorganic analogues of E. O. Fischer's alkynylcarbynes, are very rare examples of molecules containing all-inorganic chains of sp-hybridized atoms. © 2024 Wiley-VCH GmbH. |
| 56. | Hu, Haiyang; Lu, Wenzheng; Antonov, Alexander; Berté, Rodrigo; Maier, Stefan A; Tittl, Andreas: Environmental permittivity-asymmetric BIC metasurfaces with electrical reconfigurability. In: Nature Communications, 15 (1), 2024, ISSN: 20411723, (Cited by: 0; All Open Access, Gold Open Access). (Type: Journal Article | Abstract | Links | BibTeX) @article{Hu2024c, title = {Environmental permittivity-asymmetric BIC metasurfaces with electrical reconfigurability}, author = {Haiyang Hu and Wenzheng Lu and Alexander Antonov and Rodrigo Berté and Stefan A Maier and Andreas Tittl}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85201385846&doi=10.1038%2fs41467-024-51340-7&partnerID=40&md5=acb426c453b453ab7e68a1498440c5a4}, doi = {10.1038/s41467-024-51340-7}, issn = {20411723}, year = {2024}, date = {2024-01-01}, journal = {Nature Communications}, volume = {15}, number = {1}, publisher = {Nature Research}, abstract = {Achieving precise spectral and temporal light manipulation at the nanoscale remains a critical challenge in nanophotonics. While photonic bound states in the continuum (BICs) have emerged as a powerful means of controlling light, their reliance on geometrical symmetry breaking for obtaining tailored resonances makes them highly susceptible to fabrication imperfections, and their generally fixed asymmetry factor fundamentally limits applications in reconfigurable metasurfaces. Here, we introduce the concept of environmental symmetry breaking by embedding identical resonators into a surrounding medium with carefully placed regions of contrasting refractive indexes, activating permittivity-driven quasi-BIC resonances (ε-qBICs) without altering the underlying resonator geometry and unlocking an additional degree of freedom for light manipulation through active tuning of the surrounding dielectric environment. We demonstrate this concept by integrating polyaniline (PANI), an electro-optically active polymer, to achieve electrically reconfigurable ε-qBICs. This integration not only demonstrates rapid switching speeds and exceptional durability but also boosts the system’s optical response to environmental perturbations. Our strategy significantly expands the capabilities of resonant light manipulation through permittivity modulation, opening avenues for on-chip optical devices, advanced sensing, and beyond. © The Author(s) 2024.}, note = {Cited by: 0; All Open Access, Gold Open Access}, keywords = {}, pubstate = {published}, tppubtype = {article} } Achieving precise spectral and temporal light manipulation at the nanoscale remains a critical challenge in nanophotonics. While photonic bound states in the continuum (BICs) have emerged as a powerful means of controlling light, their reliance on geometrical symmetry breaking for obtaining tailored resonances makes them highly susceptible to fabrication imperfections, and their generally fixed asymmetry factor fundamentally limits applications in reconfigurable metasurfaces. Here, we introduce the concept of environmental symmetry breaking by embedding identical resonators into a surrounding medium with carefully placed regions of contrasting refractive indexes, activating permittivity-driven quasi-BIC resonances (ε-qBICs) without altering the underlying resonator geometry and unlocking an additional degree of freedom for light manipulation through active tuning of the surrounding dielectric environment. We demonstrate this concept by integrating polyaniline (PANI), an electro-optically active polymer, to achieve electrically reconfigurable ε-qBICs. This integration not only demonstrates rapid switching speeds and exceptional durability but also boosts the system’s optical response to environmental perturbations. Our strategy significantly expands the capabilities of resonant light manipulation through permittivity modulation, opening avenues for on-chip optical devices, advanced sensing, and beyond. © The Author(s) 2024. |
| 57. | Wagner, Laura I; Sirotti, Elise; Brune, Oliver; Grötzner, Gabriel; Eichhorn, Johanna; Santra, Saswati; Munnik, Frans; Olivi, Luca; Pollastri, Simone; Streibel, Verena; Sharp, Ian D: Defect Engineering of Ta3N5 Photoanodes: Enhancing Charge Transport and Photoconversion Efficiencies via Ti Doping. In: Advanced Functional Materials, 34 (4), 2024, ISSN: 1616301X, (Cited by: 5; All Open Access, Hybrid Gold Open Access). (Type: Journal Article | Abstract | Links | BibTeX) @article{Wagner2024b, title = {Defect Engineering of Ta3N5 Photoanodes: Enhancing Charge Transport and Photoconversion Efficiencies via Ti Doping}, author = {Laura I Wagner and Elise Sirotti and Oliver Brune and Gabriel Grötzner and Johanna Eichhorn and Saswati Santra and Frans Munnik and Luca Olivi and Simone Pollastri and Verena Streibel and Ian D Sharp}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85174298732&doi=10.1002%2fadfm.202306539&partnerID=40&md5=07d09e9fb76610871d002b052502e616}, doi = {10.1002/adfm.202306539}, issn = {1616301X}, year = {2024}, date = {2024-01-01}, journal = {Advanced Functional Materials}, volume = {34}, number = {4}, publisher = {John Wiley and Sons Inc}, abstract = {While Ta3N5 shows excellent potential as a semiconductor photoanode for solar water splitting, its performance is hindered by poor charge carrier transport and trapping due to native defects that introduce electronic states deep within its bandgap. Here, it is demonstrated that controlled Ti doping of Ta3N5 can dramatically reduce the concentration of deep-level defects and enhance its photoelectrochemical performance, yielding a sevenfold increase in photocurrent density and a 300 mV cathodic shift in photocurrent onset potential compared to undoped material. Comprehensive characterization reveals that Ti4+ ions substitute Ta5+ lattice sites, thereby introducing compensating acceptor states, reducing the concentrations of deleterious nitrogen vacancies and reducing Ta3+ states, and thereby suppressing trapping and recombination. Owing to the similar ionic radii of Ti4+ and Ta5+, substitutional doping does not introduce lattice strain or significantly affect the underlying electronic structure of the host semiconductor. Furthermore, Ti can be incorporated without increasing the oxygen donor content, thereby enabling the electrical conductivity to be tuned by over seven orders of magnitude. Thus, Ti doping of Ta3N5 provides a powerful basis for precisely engineering its optoelectronic characteristics and to substantially improve its functional characteristics as an advanced photoelectrode for solar fuels applications. © 2023 The Authors. Advanced Functional Materials published by Wiley-VCH GmbH.}, note = {Cited by: 5; All Open Access, Hybrid Gold Open Access}, keywords = {}, pubstate = {published}, tppubtype = {article} } While Ta3N5 shows excellent potential as a semiconductor photoanode for solar water splitting, its performance is hindered by poor charge carrier transport and trapping due to native defects that introduce electronic states deep within its bandgap. Here, it is demonstrated that controlled Ti doping of Ta3N5 can dramatically reduce the concentration of deep-level defects and enhance its photoelectrochemical performance, yielding a sevenfold increase in photocurrent density and a 300 mV cathodic shift in photocurrent onset potential compared to undoped material. Comprehensive characterization reveals that Ti4+ ions substitute Ta5+ lattice sites, thereby introducing compensating acceptor states, reducing the concentrations of deleterious nitrogen vacancies and reducing Ta3+ states, and thereby suppressing trapping and recombination. Owing to the similar ionic radii of Ti4+ and Ta5+, substitutional doping does not introduce lattice strain or significantly affect the underlying electronic structure of the host semiconductor. Furthermore, Ti can be incorporated without increasing the oxygen donor content, thereby enabling the electrical conductivity to be tuned by over seven orders of magnitude. Thus, Ti doping of Ta3N5 provides a powerful basis for precisely engineering its optoelectronic characteristics and to substantially improve its functional characteristics as an advanced photoelectrode for solar fuels applications. © 2023 The Authors. Advanced Functional Materials published by Wiley-VCH GmbH. |
| 58. | Miralles, Bernabé; Paredes, María Y; Bragas, Andrea V; Grinblat, Gustavo; Cortés, Emiliano; Scarpettini, Alberto F: Arsenic Oxidation Kinetics with Plasmonic Nanocatalysts. In: Journal of Physical Chemistry C, 128 (24), pp. 10017 – 10024, 2024, ISSN: 19327447, (Cited by: 0). (Type: Journal Article | Abstract | Links | BibTeX) @article{Miralles202410017, title = {Arsenic Oxidation Kinetics with Plasmonic Nanocatalysts}, author = {Bernabé Miralles and María Y Paredes and Andrea V Bragas and Gustavo Grinblat and Emiliano Cortés and Alberto F Scarpettini}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85195592462&doi=10.1021%2facs.jpcc.4c02905&partnerID=40&md5=e80a2c1d7391ab3fc7e07287bda49762}, doi = {10.1021/acs.jpcc.4c02905}, issn = {19327447}, year = {2024}, date = {2024-01-01}, journal = {Journal of Physical Chemistry C}, volume = {128}, number = {24}, pages = {10017 – 10024}, publisher = {American Chemical Society}, abstract = {Arsenic is one of the most toxic elements present in natural waters, and prolonged ingestion causes severe damage to health. Its oxidation from highly toxic As(III) to less harmful species involving As(V) is a process included in most remediation methods. The kinetics of this homogeneous redox reaction in the presence of hydrogen peroxide is very slow. We propose the use of metal nanoparticles as plasmonic catalysts for this reaction assisted by solar illumination. In this work, we show that As(III) oxidation to As(V) is accelerated by gold and silver nanoparticles through heterogeneous catalysis, and under plasmon excitation, hot charge carriers are generated that contribute to further increase in the reaction rate. We evaluate the efficiency of these nanocatalysts and their dependence on the excitation wavelength, and we quantify the different contributions to the oxidation process. Our results show that gold nanoparticles are better heterogeneous catalysts than silver nanoparticles; however, the latter increase their efficiency 8 times under resonant illumination, with irradiation powers close to that of sunlight, evidencing that the lower-cost material becomes a more efficient catalyst with light. © 2024 American Chemical Society}, note = {Cited by: 0}, keywords = {}, pubstate = {published}, tppubtype = {article} } Arsenic is one of the most toxic elements present in natural waters, and prolonged ingestion causes severe damage to health. Its oxidation from highly toxic As(III) to less harmful species involving As(V) is a process included in most remediation methods. The kinetics of this homogeneous redox reaction in the presence of hydrogen peroxide is very slow. We propose the use of metal nanoparticles as plasmonic catalysts for this reaction assisted by solar illumination. In this work, we show that As(III) oxidation to As(V) is accelerated by gold and silver nanoparticles through heterogeneous catalysis, and under plasmon excitation, hot charge carriers are generated that contribute to further increase in the reaction rate. We evaluate the efficiency of these nanocatalysts and their dependence on the excitation wavelength, and we quantify the different contributions to the oxidation process. Our results show that gold nanoparticles are better heterogeneous catalysts than silver nanoparticles; however, the latter increase their efficiency 8 times under resonant illumination, with irradiation powers close to that of sunlight, evidencing that the lower-cost material becomes a more efficient catalyst with light. © 2024 American Chemical Society |
| 59. | Petry, Jannik; Erabhoina, Harimohan; Dietel, Markus; Thelakkat, Mukundan: Comparative Study of the Mechanical Reinforcement by Blending, Filling, and Block Copolymerization in Bottlebrush Polymer Electrolytes. In: ACS Applied Polymer Materials, 6 (9), pp. 5109 – 5120, 2024, ISSN: 26376105, (Cited by: 1). (Type: Journal Article | Abstract | Links | BibTeX) @article{Petry20245109, title = {Comparative Study of the Mechanical Reinforcement by Blending, Filling, and Block Copolymerization in Bottlebrush Polymer Electrolytes}, author = {Jannik Petry and Harimohan Erabhoina and Markus Dietel and Mukundan Thelakkat}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85192170375&doi=10.1021%2facsapm.4c00161&partnerID=40&md5=597ae552d34b94ce7326c6e10b4d4ec9}, doi = {10.1021/acsapm.4c00161}, issn = {26376105}, year = {2024}, date = {2024-01-01}, journal = {ACS Applied Polymer Materials}, volume = {6}, number = {9}, pages = {5109 – 5120}, publisher = {American Chemical Society}, abstract = {Poly(ethylene glycol) (PEG)-based bottlebrush polymer electrolytes exhibit improved room-temperature ionic conductivity and reduced crystallinity compared to those of semicrystalline poly(ethylene oxide) (PEO). However, these graft copolymers suffer from low mechanical stability. Therefore, we synthesized a PEG-based bottlebrush polymer having a polynorbornene backbone using ring-opening metathesis polymerization, and it was mechanically reinforced using three strategies: (a) by blending with a polynorbornene (PNb) homopolymer, (b) filling with TiO2 nanoparticles, or (c) via block copolymerization with a PNb segment. All three systems were converted to solid polymer electrolytes by adding LiTFSI, and their thermal, mechanical, and detailed electrochemical properties in symmetrical Li/SPE/Li cells over a large number of cycles are given. All solid-state lithium metal battery (Li/SPE/LFP) cells were fabricated, and charge/discharge cycles as well as the cycling behavior were comparatively studied. It was found that block copolymerization resulted in the highest storage modulus above 0.1 Hz and overall ionic conductivity (in the whole range of 25 to 80 °C) compared to those of the other two strategies. Furthermore, the highest accessible discharge capacities (159 mA h g-1) and highest capacity retention of 88% after 50 cycles were also achieved with the block copolymer concept. © 2024 The Authors. Published by American Chemical Society.}, note = {Cited by: 1}, keywords = {}, pubstate = {published}, tppubtype = {article} } Poly(ethylene glycol) (PEG)-based bottlebrush polymer electrolytes exhibit improved room-temperature ionic conductivity and reduced crystallinity compared to those of semicrystalline poly(ethylene oxide) (PEO). However, these graft copolymers suffer from low mechanical stability. Therefore, we synthesized a PEG-based bottlebrush polymer having a polynorbornene backbone using ring-opening metathesis polymerization, and it was mechanically reinforced using three strategies: (a) by blending with a polynorbornene (PNb) homopolymer, (b) filling with TiO2 nanoparticles, or (c) via block copolymerization with a PNb segment. All three systems were converted to solid polymer electrolytes by adding LiTFSI, and their thermal, mechanical, and detailed electrochemical properties in symmetrical Li/SPE/Li cells over a large number of cycles are given. All solid-state lithium metal battery (Li/SPE/LFP) cells were fabricated, and charge/discharge cycles as well as the cycling behavior were comparatively studied. It was found that block copolymerization resulted in the highest storage modulus above 0.1 Hz and overall ionic conductivity (in the whole range of 25 to 80 °C) compared to those of the other two strategies. Furthermore, the highest accessible discharge capacities (159 mA h g-1) and highest capacity retention of 88% after 50 cycles were also achieved with the block copolymer concept. © 2024 The Authors. Published by American Chemical Society. |
| 60. | Zhang, Wenhao; Deng, Meihui; Xiong, Qingqing: Evaluation of energy performance in positive energy building: X HOUSE at Solar Decathlon Middle East 2021. In: Renewable and Sustainable Energy Reviews, 192 , 2024, ISSN: 13640321, (Cited by: 2). (Type: Journal Article | Abstract | Links | BibTeX) @article{Zhang2024b, title = {Evaluation of energy performance in positive energy building: X HOUSE at Solar Decathlon Middle East 2021}, author = {Wenhao Zhang and Meihui Deng and Qingqing Xiong}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85180980490&doi=10.1016%2fj.rser.2023.114163&partnerID=40&md5=240248692cb2dc543fa704b9018cdc70}, doi = {10.1016/j.rser.2023.114163}, issn = {13640321}, year = {2024}, date = {2024-01-01}, journal = {Renewable and Sustainable Energy Reviews}, volume = {192}, publisher = {Elsevier Ltd}, abstract = {Internationally known as the “Olympics of Sustainable Building”, Solar Decathlon Middle East 2021 is the first competition linked to a world EXPO. The competition requests teams to design, build and operate a zero-energy house to drive the buildings and cities in the Middle East to transform into sustainable and intelligent ones. X HOUSE took first place in the Solar Decathlon Middle East 2021 and won eight contests. This article analyzes how the simulation optimization guides the design of X HOUSE to achieve higher energy efficiency and comfort conditions in terms of passive and active design strategies and solar energy utilization. It verifies the effectiveness of the simulation by a detailed analysis based on the monitored data at the competition site in Dubai. It also studies how house management strategies can improve the actual energy performance of X HOUSE. The analysis results show that the X HOUSE is a Positive Energy Building with highly efficient comfort and energy performance, it has strong power accommodation ability for peak shaving without relying on the grid, and it provides satisfactory thermal, ventilation, luminous, acoustics and healthy environment as well as a fully functional and flexible space. It provides a reference and methodology for the design of PEBs and sustainable development in the Middle East. © 2023 Elsevier Ltd}, note = {Cited by: 2}, keywords = {}, pubstate = {published}, tppubtype = {article} } Internationally known as the “Olympics of Sustainable Building”, Solar Decathlon Middle East 2021 is the first competition linked to a world EXPO. The competition requests teams to design, build and operate a zero-energy house to drive the buildings and cities in the Middle East to transform into sustainable and intelligent ones. X HOUSE took first place in the Solar Decathlon Middle East 2021 and won eight contests. This article analyzes how the simulation optimization guides the design of X HOUSE to achieve higher energy efficiency and comfort conditions in terms of passive and active design strategies and solar energy utilization. It verifies the effectiveness of the simulation by a detailed analysis based on the monitored data at the competition site in Dubai. It also studies how house management strategies can improve the actual energy performance of X HOUSE. The analysis results show that the X HOUSE is a Positive Energy Building with highly efficient comfort and energy performance, it has strong power accommodation ability for peak shaving without relying on the grid, and it provides satisfactory thermal, ventilation, luminous, acoustics and healthy environment as well as a fully functional and flexible space. It provides a reference and methodology for the design of PEBs and sustainable development in the Middle East. © 2023 Elsevier Ltd |
References (last update: Sept. 23, 2024):
2024 |
Valente, Gonçalo; Dantas, Raquel; Ferreira, Pedro; Grieco, Rebecca; Patil, Nagaraj; Guillem-Navajas, Ana; Miguel, David Rodríguez-San; Zamora, Félix; Guntermann, Roman; Bein, Thomas; Rocha, João; Braga, Helena M; Strutyński, Karol; Melle-Franco, Manuel; Marcilla, Rebeca; Souto, Manuel Tetrathiafulvalene-based covalent organic frameworks as high-voltage organic cathodes for lithium batteries Journal Article Journal of Materials Chemistry A, 2024, ISSN: 20507488, (Cited by: 0). Abstract | Links | BibTeX | Tags: Lithium compounds; Lithium-ion batteries; Redox reactions; Covalent organic frameworks; Electrode material; High-voltages; Ion batteries; Metals ions; Organic cathodes; Redox-active; Tetrathiafulvalenes; Tunables; Two-dimensional; Electrochemical electrodes @article{Valente2024, title = {Tetrathiafulvalene-based covalent organic frameworks as high-voltage organic cathodes for lithium batteries}, author = {Gonçalo Valente and Raquel Dantas and Pedro Ferreira and Rebecca Grieco and Nagaraj Patil and Ana Guillem-Navajas and David Rodríguez-San Miguel and Félix Zamora and Roman Guntermann and Thomas Bein and João Rocha and Helena M Braga and Karol Strutyński and Manuel Melle-Franco and Rebeca Marcilla and Manuel Souto}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85201428063&doi=10.1039%2fd4ta04576a&partnerID=40&md5=961b9f8d9b2a7e85f5fa41fbc3c5a440}, doi = {10.1039/d4ta04576a}, issn = {20507488}, year = {2024}, date = {2024-01-01}, journal = {Journal of Materials Chemistry A}, publisher = {Royal Society of Chemistry}, abstract = {Redox-active covalent organic frameworks (COFs) are promising electrode materials for metal-ion batteries owing to their tunable electrochemical properties, adjustable structure, and resource availability. Herein, we report a series of two-dimensional tetrathiafulvalene (TTF)-based COFs incorporating different organic linkers between the electroactive moieties. These COFs were investigated as p-type organic cathode materials for lithium-organic batteries. The electrical conductivity of both neutral and doped TTF-COFs was measured using a van der Pauw setup, and their electronic structures were investigated through quantum-chemical calculations. Binder-free buckypaper TTF-based electrodes were prepared and systematically tested as organic cathodes in lithium half-cells. The results revealed high average discharge potentials (∼3.6 V vs. Li/Li+) and consistent cycling stability (80% capacity retention after 400 cycles at 2C) for the three TTF-COF electrodes. In addition, the specific capacity, rate capability, and kinetics varied depending on the structure of the framework. Our results highlight the potential of TTF-COFs as high-voltage organic cathodes for metal-ion batteries and emphasize the importance of molecular design in optimizing their electrochemical performance. © 2024 The Royal Society of Chemistry.}, note = {Cited by: 0}, keywords = {Lithium compounds; Lithium-ion batteries; Redox reactions; Covalent organic frameworks; Electrode material; High-voltages; Ion batteries; Metals ions; Organic cathodes; Redox-active; Tetrathiafulvalenes; Tunables; Two-dimensional; Electrochemical electrodes}, pubstate = {published}, tppubtype = {article} } Redox-active covalent organic frameworks (COFs) are promising electrode materials for metal-ion batteries owing to their tunable electrochemical properties, adjustable structure, and resource availability. Herein, we report a series of two-dimensional tetrathiafulvalene (TTF)-based COFs incorporating different organic linkers between the electroactive moieties. These COFs were investigated as p-type organic cathode materials for lithium-organic batteries. The electrical conductivity of both neutral and doped TTF-COFs was measured using a van der Pauw setup, and their electronic structures were investigated through quantum-chemical calculations. Binder-free buckypaper TTF-based electrodes were prepared and systematically tested as organic cathodes in lithium half-cells. The results revealed high average discharge potentials (∼3.6 V vs. Li/Li+) and consistent cycling stability (80% capacity retention after 400 cycles at 2C) for the three TTF-COF electrodes. In addition, the specific capacity, rate capability, and kinetics varied depending on the structure of the framework. Our results highlight the potential of TTF-COFs as high-voltage organic cathodes for metal-ion batteries and emphasize the importance of molecular design in optimizing their electrochemical performance. © 2024 The Royal Society of Chemistry. |
Aigner, Andreas; Ligmajer, Filip; Rovenská, Katarína; Holobrádek, Jakub; Idesová, Beáta; Maier, Stefan A; Tittl, Andreas; de Menezes, Leonardo S Engineering of Active and Passive Loss in High-Quality-Factor Vanadium Dioxide-Based BIC Metasurfaces Journal Article Nano Letters, 2024, ISSN: 15306984, (Cited by: 0; All Open Access, Hybrid Gold Open Access). Abstract | Links | BibTeX | Tags: oxide; vanadium; Active metasurface; Bound state in the continuum; Bound-states; Loss tunability; Metasurface; Near fields; Near-field tunability; Tunabilities; Vanadium dioxide; article; controlled study; nanophotonics; temperature; Nanophotonics @article{Aigner2024, title = {Engineering of Active and Passive Loss in High-Quality-Factor Vanadium Dioxide-Based BIC Metasurfaces}, author = {Andreas Aigner and Filip Ligmajer and Katarína Rovenská and Jakub Holobrádek and Beáta Idesová and Stefan A Maier and Andreas Tittl and Leonardo de S. Menezes}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85202647685&doi=10.1021%2facs.nanolett.4c01703&partnerID=40&md5=a06760cb7b7f4e006a623ff6232c4499}, doi = {10.1021/acs.nanolett.4c01703}, issn = {15306984}, year = {2024}, date = {2024-01-01}, journal = {Nano Letters}, publisher = {American Chemical Society}, abstract = {Active functionalities of metasurfaces are of growing interest in nanophotonics. The main strategy employed to date is spectral resonance tuning affecting predominantly the far-field response. However, this barely influences other essential resonance properties like near-field enhancement, signal modulation, quality factor, and absorbance, which are all vital for numerous applications. Here we introduce an active metasurface approach that combines temperature-tunable losses in vanadium dioxide with far-field coupling tunable symmetry-protected bound states in the continuum. This method enables exceptional precision in independently controlling both radiative and nonradiative losses. Consequently, it allows for the adjustment of both the far-field response and, notably, the near-field characteristics like local field enhancement and absorbance. We experimentally demonstrate continuous tuning from under- through critical- to overcoupling, achieving quality factors of 200 and a relative switching contrast of 78%. Our research marks a significant step toward highly tunable metasurfaces, controlling both near- and far-field properties. © 2024 The Authors. Published by American Chemical Society.}, note = {Cited by: 0; All Open Access, Hybrid Gold Open Access}, keywords = {oxide; vanadium; Active metasurface; Bound state in the continuum; Bound-states; Loss tunability; Metasurface; Near fields; Near-field tunability; Tunabilities; Vanadium dioxide; article; controlled study; nanophotonics; temperature; Nanophotonics}, pubstate = {published}, tppubtype = {article} } Active functionalities of metasurfaces are of growing interest in nanophotonics. The main strategy employed to date is spectral resonance tuning affecting predominantly the far-field response. However, this barely influences other essential resonance properties like near-field enhancement, signal modulation, quality factor, and absorbance, which are all vital for numerous applications. Here we introduce an active metasurface approach that combines temperature-tunable losses in vanadium dioxide with far-field coupling tunable symmetry-protected bound states in the continuum. This method enables exceptional precision in independently controlling both radiative and nonradiative losses. Consequently, it allows for the adjustment of both the far-field response and, notably, the near-field characteristics like local field enhancement and absorbance. We experimentally demonstrate continuous tuning from under- through critical- to overcoupling, achieving quality factors of 200 and a relative switching contrast of 78%. Our research marks a significant step toward highly tunable metasurfaces, controlling both near- and far-field properties. © 2024 The Authors. Published by American Chemical Society. |
Betker, Marie; Erichlandwehr, Tim; Sochor, Benedikt; Erbes, Elisabeth; Kurmanbay, Alisher; Alon, Yamit; Li, Yanan; Fernandez-Cuesta, Irene; Müller-Buschbaum, Peter; Techert, Simone A; Söderberg, Daniel L; Roth, Stephan V Micrometer-Thin Nanocellulose Foils for 3D Organic Electronics Journal Article Advanced Functional Materials, 2024, ISSN: 1616301X, (Cited by: 0; All Open Access, Hybrid Gold Open Access). Abstract | Links | BibTeX | Tags: Biodegradability; Biodegradable polymers; Conducting polymers; Deposition; Functional materials; Nanocellulose; Spray nozzles; 3d material; Mechanical; Nano-cellulose; Optical transparency; Organic electronics; Property; Spray deposition; Substrate material; Thin-films; Ultra-thin; Substrates @article{Betker2024, title = {Micrometer-Thin Nanocellulose Foils for 3D Organic Electronics}, author = {Marie Betker and Tim Erichlandwehr and Benedikt Sochor and Elisabeth Erbes and Alisher Kurmanbay and Yamit Alon and Yanan Li and Irene Fernandez-Cuesta and Peter Müller-Buschbaum and Simone A Techert and Daniel L Söderberg and Stephan V Roth}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85193521275&doi=10.1002%2fadfm.202403952&partnerID=40&md5=e74d8059dea72b93fe3121f6cbb1266c}, doi = {10.1002/adfm.202403952}, issn = {1616301X}, year = {2024}, date = {2024-01-01}, journal = {Advanced Functional Materials}, publisher = {John Wiley and Sons Inc}, abstract = {Cellulose is a natural polymer with great properties such as high optical transparency and mechanical strength, flexibility, and biodegradability. Hence, cellulose-based foils are suitable for the replacement of synthetic polymers as substrate materials in organic electronics. This article reports the fabrication of ultrathin, free-standing cellulose foils by spraying aqueous 2,2,6,6-tetramethylpiperidine-1-oxyl-nanocellulose (TEMPO) fibrils ink layer-by-layer on a hot substrate using a movable spray nozzle. The resulting foils are only 2 ± 1 µm in thickness with an average basis weight of 1.9 g m−2, which ranges in the same scale as the world's thinnest paper. The suitability of these ultra-thin nanocellulose foils as a sustainable substrate material for organic electronic applications is demonstrated by testing the foils resistance against organic solvents. Furthermore, silver nanowires (AgNWs) and the blend poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) are integrated into the foils, and the foils are molded into 3D paper structures in order to create conductive, paper-based building blocks for organic electronics. © 2024 The Authors. Advanced Functional Materials published by Wiley-VCH GmbH.}, note = {Cited by: 0; All Open Access, Hybrid Gold Open Access}, keywords = {Biodegradability; Biodegradable polymers; Conducting polymers; Deposition; Functional materials; Nanocellulose; Spray nozzles; 3d material; Mechanical; Nano-cellulose; Optical transparency; Organic electronics; Property; Spray deposition; Substrate material; Thin-films; Ultra-thin; Substrates}, pubstate = {published}, tppubtype = {article} } Cellulose is a natural polymer with great properties such as high optical transparency and mechanical strength, flexibility, and biodegradability. Hence, cellulose-based foils are suitable for the replacement of synthetic polymers as substrate materials in organic electronics. This article reports the fabrication of ultrathin, free-standing cellulose foils by spraying aqueous 2,2,6,6-tetramethylpiperidine-1-oxyl-nanocellulose (TEMPO) fibrils ink layer-by-layer on a hot substrate using a movable spray nozzle. The resulting foils are only 2 ± 1 µm in thickness with an average basis weight of 1.9 g m−2, which ranges in the same scale as the world's thinnest paper. The suitability of these ultra-thin nanocellulose foils as a sustainable substrate material for organic electronic applications is demonstrated by testing the foils resistance against organic solvents. Furthermore, silver nanowires (AgNWs) and the blend poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) are integrated into the foils, and the foils are molded into 3D paper structures in order to create conductive, paper-based building blocks for organic electronics. © 2024 The Authors. Advanced Functional Materials published by Wiley-VCH GmbH. |
Chen, Shouzheng; Harder, Constantin; Ribca, Iuliana; Sochor, Benedikt; Erbes, Elisabeth; Bulut, Yusuf; Pluntke, Luciana; Meinhardt, Alexander; Schummer, Bernhard; Oberthür, Markus; Keller, Thomas F; Söderberg, Daniel L; Techert, Simone A; Stierle, Andreas; Müller-Buschbaum, Peter; Johansson, Mats K G; Navarro, Julien; Roth, Stephan V Sprayed water-based lignin colloidal nanoparticle-cellulose nanofibril hybrid films with UV-blocking ability Journal Article Nanoscale Advances, 2024, ISSN: 25160230, (Cited by: 0; All Open Access, Gold Open Access). Abstract | Links | BibTeX | Tags: Cellulose films; Cellulose nanocrystals; Nanocellulose; Nanoclay; Nanoparticles; Cellulose nanofibrils; Colloidal nanoparticles; Film-forming properties; Functionals; Global climate changes; Hybrid film; Hydrophilic interfaces; Natural biopolymers; UV blocking; Water based; Nanofibers @article{Chen2024, title = {Sprayed water-based lignin colloidal nanoparticle-cellulose nanofibril hybrid films with UV-blocking ability}, author = {Shouzheng Chen and Constantin Harder and Iuliana Ribca and Benedikt Sochor and Elisabeth Erbes and Yusuf Bulut and Luciana Pluntke and Alexander Meinhardt and Bernhard Schummer and Markus Oberthür and Thomas F Keller and Daniel L Söderberg and Simone A Techert and Andreas Stierle and Peter Müller-Buschbaum and Mats K G Johansson and Julien Navarro and Stephan V Roth}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85202938425&doi=10.1039%2fd4na00191e&partnerID=40&md5=80206fed1968bc7367190c873d5d97cd}, doi = {10.1039/d4na00191e}, issn = {25160230}, year = {2024}, date = {2024-01-01}, journal = {Nanoscale Advances}, publisher = {Royal Society of Chemistry}, abstract = {In the context of global climate change, the demand for new functional materials that are sustainable and environmentally friendly is rapidly increasing. Cellulose and lignin are the two most abundant raw materials in nature, and are ideal components for functional materials. The hydrophilic interface and easy film-forming properties of cellulose nanofibrils make them excellent candidates for natural biopolymer templates and network structures. Lignin is a natural UV-shielding material, as it contains a large number of phenolic groups. In this work, we have applied two routes for spray deposition of hybrid films with different laminar structures using surface-charged cellulose nanofibrils and water-based colloidal lignin particles. As the first route, we prepare stacked colloidal lignin particles and cellulose nanofibrils hybrid film through a layer-by-layer deposition. As the second route, we spray-deposite premixed colloidal lignin particles and cellulose nanofibrils dispersion to prepare a mixed hybrid film. We find that cellulose nanofibrils act as a directing agent to dominate the arrangement of the colloidal lignin particles in a mixed system. Additionally, cellulose nanofibrils eliminate the agglomerations and thus increase the visible light transparency while retaining the UV shielding ability. Our research on these colloidal lignin and cellulose nanofibril hybrid films provides a fundamental understanding of using colloidal lignin nanoparticles as functional material on porous cellulose-based materials, for example on fabrics. © 2024 RSC}, note = {Cited by: 0; All Open Access, Gold Open Access}, keywords = {Cellulose films; Cellulose nanocrystals; Nanocellulose; Nanoclay; Nanoparticles; Cellulose nanofibrils; Colloidal nanoparticles; Film-forming properties; Functionals; Global climate changes; Hybrid film; Hydrophilic interfaces; Natural biopolymers; UV blocking; Water based; Nanofibers}, pubstate = {published}, tppubtype = {article} } In the context of global climate change, the demand for new functional materials that are sustainable and environmentally friendly is rapidly increasing. Cellulose and lignin are the two most abundant raw materials in nature, and are ideal components for functional materials. The hydrophilic interface and easy film-forming properties of cellulose nanofibrils make them excellent candidates for natural biopolymer templates and network structures. Lignin is a natural UV-shielding material, as it contains a large number of phenolic groups. In this work, we have applied two routes for spray deposition of hybrid films with different laminar structures using surface-charged cellulose nanofibrils and water-based colloidal lignin particles. As the first route, we prepare stacked colloidal lignin particles and cellulose nanofibrils hybrid film through a layer-by-layer deposition. As the second route, we spray-deposite premixed colloidal lignin particles and cellulose nanofibrils dispersion to prepare a mixed hybrid film. We find that cellulose nanofibrils act as a directing agent to dominate the arrangement of the colloidal lignin particles in a mixed system. Additionally, cellulose nanofibrils eliminate the agglomerations and thus increase the visible light transparency while retaining the UV shielding ability. Our research on these colloidal lignin and cellulose nanofibril hybrid films provides a fundamental understanding of using colloidal lignin nanoparticles as functional material on porous cellulose-based materials, for example on fabrics. © 2024 RSC |
Schmidt, Martina; Karg, Matthias; Thelakkat, Mukundan; Brendel, Johannes C Correlating Molar Mass, π-Conjugation, and Optical Properties of Narrowly Distributed Anionic Polythiophenes in Aqueous Solutions Journal Article Macromolecular Rapid Communications, 45 (1), 2024, ISSN: 10221336, (Cited by: 0; All Open Access, Hybrid Gold Open Access). Abstract | Links | BibTeX | Tags: @article{Schmidt2024, title = {Correlating Molar Mass, π-Conjugation, and Optical Properties of Narrowly Distributed Anionic Polythiophenes in Aqueous Solutions}, author = {Martina Schmidt and Matthias Karg and Mukundan Thelakkat and Johannes C Brendel}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85167802995&doi=10.1002%2fmarc.202300396&partnerID=40&md5=25ee68f651d0dd779b6347c53ce70a27}, doi = {10.1002/marc.202300396}, issn = {10221336}, year = {2024}, date = {2024-01-01}, journal = {Macromolecular Rapid Communications}, volume = {45}, number = {1}, publisher = {John Wiley and Sons Inc}, abstract = {Polythiophene-based conjugated polyelectrolytes (CPE) are attracting increasing attention as sensor or interface materials in chemistry and biology. While cationic polythiophenes are better understood, limited structural information is available on their anionic counterparts. Limited access to well-defined polymers has made the study of structure-property relationships difficult and clear correlations have remained elusive. By combining controlled Kumada catalyst transfer polymerization with a polymer-analog substitution, regioregular and narrowly distributed poly(6-(thiophen-3-yl)hexane-1-sulfonate)s (PTHS) with tailored chain length are prepared. Analysis of their aqueous solution structures by small-angle neutron scattering (SANS) revealed a cylindrical conformation for all polymers tested, with a length close to the contour length of the polymer chains, while the estimated radii remain too small (<1.5 nm) for extensive π-stacking of the chains. The latter is particularly interesting as the longest polymer exhibits a concentration-independent structured absorption typical of crystalline polythiophenes. Increasing the ionic strength of the solution diminishes these features as the Coulomb repulsion between the charged repeat units is shielded, allowing the polymer to adopt a more coiled conformation. The extended π-conjugation, therefore, appears to be a key parameter for these unique optical features, which are not present in the corresponding cationic polythiophenes. © 2023 The Authors. Macromolecular Rapid Communications published by Wiley-VCH GmbH.}, note = {Cited by: 0; All Open Access, Hybrid Gold Open Access}, keywords = {}, pubstate = {published}, tppubtype = {article} } Polythiophene-based conjugated polyelectrolytes (CPE) are attracting increasing attention as sensor or interface materials in chemistry and biology. While cationic polythiophenes are better understood, limited structural information is available on their anionic counterparts. Limited access to well-defined polymers has made the study of structure-property relationships difficult and clear correlations have remained elusive. By combining controlled Kumada catalyst transfer polymerization with a polymer-analog substitution, regioregular and narrowly distributed poly(6-(thiophen-3-yl)hexane-1-sulfonate)s (PTHS) with tailored chain length are prepared. Analysis of their aqueous solution structures by small-angle neutron scattering (SANS) revealed a cylindrical conformation for all polymers tested, with a length close to the contour length of the polymer chains, while the estimated radii remain too small (<1.5 nm) for extensive π-stacking of the chains. The latter is particularly interesting as the longest polymer exhibits a concentration-independent structured absorption typical of crystalline polythiophenes. Increasing the ionic strength of the solution diminishes these features as the Coulomb repulsion between the charged repeat units is shielded, allowing the polymer to adopt a more coiled conformation. The extended π-conjugation, therefore, appears to be a key parameter for these unique optical features, which are not present in the corresponding cationic polythiophenes. © 2023 The Authors. Macromolecular Rapid Communications published by Wiley-VCH GmbH. |
Bao, Yaqi; Li, Maoxin; Jin, Hangfan; Wang, Xiaobo; Zeng, Jie; Feng, Yang; Hui, Wei; Wang, Dourong; Gu, Lei; Zhang, Jie; Hua, Yikun; Wang, Xiao; Xu, Baomin; Chen, Wei; Wu, Zhongbin; Müller-Buschbaum, Peter; Song, Lin Directional Charge Carrier Management Enabled by Orderly Arranged Perovskite Heterodomain with Defined Size for Self-Powered Photodetectors Journal Article Advanced Functional Materials, 2024, ISSN: 1616301X, (Cited by: 0). Abstract | Links | BibTeX | Tags: Carrier transport; Heterojunctions; Photodetectors; Photons; Built-in-potential; Bulk heterojunction; Carrier separation; Charge carrier transport channel; Charge carriers transport; Heterodomain; Self-powered; Self-powered photodetector; Transport channel; Travel distance; Perovskite @article{Bao2024, title = {Directional Charge Carrier Management Enabled by Orderly Arranged Perovskite Heterodomain with Defined Size for Self-Powered Photodetectors}, author = {Yaqi Bao and Maoxin Li and Hangfan Jin and Xiaobo Wang and Jie Zeng and Yang Feng and Wei Hui and Dourong Wang and Lei Gu and Jie Zhang and Yikun Hua and Xiao Wang and Baomin Xu and Wei Chen and Zhongbin Wu and Peter Müller-Buschbaum and Lin Song}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85193513101&doi=10.1002%2fadfm.202404697&partnerID=40&md5=ca0b9b978a85c5dcf11002f1f93411f6}, doi = {10.1002/adfm.202404697}, issn = {1616301X}, year = {2024}, date = {2024-01-01}, journal = {Advanced Functional Materials}, publisher = {John Wiley and Sons Inc}, abstract = {Perovskite planar heterojunction is reported to promote charge-carrier separation at the interface due to the introduced built-in potential, leading to improved charge-carrier harvesting. However, the possible diffusion of charge carriers along the film lateral will increase their travel distance to respective electrodes, resulting in increased recombination probabilities. Constructing independent transport channels for positive and negative charge carriers individually is an efficient way to optimize the transport in the perovskite layer and thereby to achieve enhanced device performance. Here, a solution-based strategy is proposed to fabricate lateral bulk heterojunction (BHJ) by arranging methylammonium-based and formamidinium-based perovskites alternately in an ordered array with controllable domains. The structure of perovskite heterodomain directs charge carrier transport along the film normal and limits in-plane charge carrier diffusion. Moreover, the ordered perovskite array is found to greatly increase light harvesting. Consequently, the self-powered photodetector based on the perovskite heterodomain with a thickness of only 250 nm achieves a specific detectivity exceeding 1 × 1014 Jones for weak light over the whole visible light spectrum. This work provides guidance toward the fabrication of perovskite lateral BHJ using solution processing, meeting the requirements not only for charge-carrier manipulation but also for light management. © 2024 Wiley-VCH GmbH.}, note = {Cited by: 0}, keywords = {Carrier transport; Heterojunctions; Photodetectors; Photons; Built-in-potential; Bulk heterojunction; Carrier separation; Charge carrier transport channel; Charge carriers transport; Heterodomain; Self-powered; Self-powered photodetector; Transport channel; Travel distance; Perovskite}, pubstate = {published}, tppubtype = {article} } Perovskite planar heterojunction is reported to promote charge-carrier separation at the interface due to the introduced built-in potential, leading to improved charge-carrier harvesting. However, the possible diffusion of charge carriers along the film lateral will increase their travel distance to respective electrodes, resulting in increased recombination probabilities. Constructing independent transport channels for positive and negative charge carriers individually is an efficient way to optimize the transport in the perovskite layer and thereby to achieve enhanced device performance. Here, a solution-based strategy is proposed to fabricate lateral bulk heterojunction (BHJ) by arranging methylammonium-based and formamidinium-based perovskites alternately in an ordered array with controllable domains. The structure of perovskite heterodomain directs charge carrier transport along the film normal and limits in-plane charge carrier diffusion. Moreover, the ordered perovskite array is found to greatly increase light harvesting. Consequently, the self-powered photodetector based on the perovskite heterodomain with a thickness of only 250 nm achieves a specific detectivity exceeding 1 × 1014 Jones for weak light over the whole visible light spectrum. This work provides guidance toward the fabrication of perovskite lateral BHJ using solution processing, meeting the requirements not only for charge-carrier manipulation but also for light management. © 2024 Wiley-VCH GmbH. |
Al-Romema, Abdulaziz A; Plass, Fabian; Nizovtsev, Alexey V; Kahnt, Axel; Tsogoeva, Svetlana B Synthesis and Photo/Radiation Chemical Characterization of a New Redox-Stable Pyridine-Triazole Ligand Journal Article ChemPhysChem, 2024, ISSN: 14394235, (Cited by: 0). Abstract | Links | BibTeX | Tags: @article{Al-Romema2024, title = {Synthesis and Photo/Radiation Chemical Characterization of a New Redox-Stable Pyridine-Triazole Ligand}, author = {Abdulaziz A Al-Romema and Fabian Plass and Alexey V Nizovtsev and Axel Kahnt and Svetlana B Tsogoeva}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85199355837&doi=10.1002%2fcphc.202400273&partnerID=40&md5=c78b0f6d075ab0c0f6df2245c4101283}, doi = {10.1002/cphc.202400273}, issn = {14394235}, year = {2024}, date = {2024-01-01}, journal = {ChemPhysChem}, publisher = {John Wiley and Sons Inc}, abstract = {Photocatalysis using transition-metal complexes is widely considered the future of effective and affordable clean-air technology. In particular, redox-stable, easily accessible ligands are decisive. Here, we report a straightforward and facile synthesis of a new highly stable 2,6-bis(triazolyl)pyridine ligand, containing a nitrile moiety as a masked anchoring group, using copper(I)-catalyzed azide-alkyne cycloaddition (CuAAC) click reaction. The reported structure mimics the binding motif of uneasy to synthesize ligands. Pulse radiolysis under oxidizing and reducing conditions provided evidence for the high stability of the formed radical cation and radical anion 2,6-di(1,2,3-triazol-1-yl)-pyridine compound, thus indicating the feasibility of utilizing this as a ligand for redox active metal complexes and the sensitization of metal-oxide semiconductors (e. g., TiO2 nanoparticles or nanotubes). © 2024 The Author(s). ChemPhysChem published by Wiley-VCH GmbH.}, note = {Cited by: 0}, keywords = {}, pubstate = {published}, tppubtype = {article} } Photocatalysis using transition-metal complexes is widely considered the future of effective and affordable clean-air technology. In particular, redox-stable, easily accessible ligands are decisive. Here, we report a straightforward and facile synthesis of a new highly stable 2,6-bis(triazolyl)pyridine ligand, containing a nitrile moiety as a masked anchoring group, using copper(I)-catalyzed azide-alkyne cycloaddition (CuAAC) click reaction. The reported structure mimics the binding motif of uneasy to synthesize ligands. Pulse radiolysis under oxidizing and reducing conditions provided evidence for the high stability of the formed radical cation and radical anion 2,6-di(1,2,3-triazol-1-yl)-pyridine compound, thus indicating the feasibility of utilizing this as a ligand for redox active metal complexes and the sensitization of metal-oxide semiconductors (e. g., TiO2 nanoparticles or nanotubes). © 2024 The Author(s). ChemPhysChem published by Wiley-VCH GmbH. |
Guo, Xiao; Jia, Zhenrong; Liu, Shunchang; Guo, Renjun; Jiang, Fangyuan; Shi, Yangwei; Dong, Zijing; Luo, Ran; Wang, Yu-Duan; Shi, Zhuojie; Li, Jia; Chen, Jinxi; Lee, Ling Kai; Müller-Buschbaum, Peter; Ginger, David S; Paterson, David J; Hou, Yi Stabilizing efficient wide-bandgap perovskite in perovskite-organic tandem solar cells Journal Article Joule, 2024, ISSN: 25424351, (Cited by: 1). Abstract | Links | BibTeX | Tags: 5-imidazoledicarbonitrile; Halide phase segregation; Iodine escape; Organics; Perovskite-organic tandem; Phase segregations; Power conversion efficiencies; Sub-cells; Tandem solar cells; Wide-band-gap; Perovskite, Conversion efficiency; Energy gap; Iodine; Lead compounds; Organic solar cells; Perovskite solar cells; Phase separation; X ray scattering; 2-amino-4 @article{Guo2024b, title = {Stabilizing efficient wide-bandgap perovskite in perovskite-organic tandem solar cells}, author = {Xiao Guo and Zhenrong Jia and Shunchang Liu and Renjun Guo and Fangyuan Jiang and Yangwei Shi and Zijing Dong and Ran Luo and Yu-Duan Wang and Zhuojie Shi and Jia Li and Jinxi Chen and Ling Kai Lee and Peter Müller-Buschbaum and David S Ginger and David J Paterson and Yi Hou}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85198585351&doi=10.1016%2fj.joule.2024.06.009&partnerID=40&md5=8f76312a131a5996d18067ca5866992a}, doi = {10.1016/j.joule.2024.06.009}, issn = {25424351}, year = {2024}, date = {2024-01-01}, journal = {Joule}, publisher = {Cell Press}, abstract = {Iodide and bromide integration facilitate bandgap tunability in wide-bandgap perovskites, yet high concentrations of bromide lead to halide phase segregation, adversely affecting the efficiency and stability of solar cell devices. In this work, 2-amino-4,5-imidazoledicarbonitrile (AIDCN), with highly polarized charge distribution and compact molecular configuration, is incorporated into a 1.86 eV wide-bandgap perovskite to effectively suppress photoinduced iodine escape and phase segregation. Hyperspectral photoluminescence microscopy reveals that AIDCN mitigates phase segregation under continuous laser exposure. Concurrent in situ grazing-incidence wide-angle X-ray scattering and X-ray fluorescence measurements further validate suppressed iodine escape, evidenced by a notable slowing down of lattice shrinkage and a well-maintained overall chemical composition of the perovskite under continuous illumination. Applying this approach, we achieve a power conversion efficiency (PCE) of 18.52% in 1.86 eV wide-bandgap perovskite solar cells. By integrating this perovskite subcell with the PM6:BTP-eC9 organic subcell, the tandem attains a maximum PCE of 25.13%, with a certified stabilized PCE of 23.40%. © 2024 Elsevier Inc.}, note = {Cited by: 1}, keywords = {5-imidazoledicarbonitrile; Halide phase segregation; Iodine escape; Organics; Perovskite-organic tandem; Phase segregations; Power conversion efficiencies; Sub-cells; Tandem solar cells; Wide-band-gap; Perovskite, Conversion efficiency; Energy gap; Iodine; Lead compounds; Organic solar cells; Perovskite solar cells; Phase separation; X ray scattering; 2-amino-4}, pubstate = {published}, tppubtype = {article} } Iodide and bromide integration facilitate bandgap tunability in wide-bandgap perovskites, yet high concentrations of bromide lead to halide phase segregation, adversely affecting the efficiency and stability of solar cell devices. In this work, 2-amino-4,5-imidazoledicarbonitrile (AIDCN), with highly polarized charge distribution and compact molecular configuration, is incorporated into a 1.86 eV wide-bandgap perovskite to effectively suppress photoinduced iodine escape and phase segregation. Hyperspectral photoluminescence microscopy reveals that AIDCN mitigates phase segregation under continuous laser exposure. Concurrent in situ grazing-incidence wide-angle X-ray scattering and X-ray fluorescence measurements further validate suppressed iodine escape, evidenced by a notable slowing down of lattice shrinkage and a well-maintained overall chemical composition of the perovskite under continuous illumination. Applying this approach, we achieve a power conversion efficiency (PCE) of 18.52% in 1.86 eV wide-bandgap perovskite solar cells. By integrating this perovskite subcell with the PM6:BTP-eC9 organic subcell, the tandem attains a maximum PCE of 25.13%, with a certified stabilized PCE of 23.40%. © 2024 Elsevier Inc. |
Kang, Ziyong; Tong, Yu; Wang, Kun; Chen, Yali; Yan, Peng; Pan, Guangjiu; Müller-Buschbaum, Peter; Zhang, Lu; Yang, Yang; Wu, Jiandong; Xie, Haijiao; Liu, Shengzhong; Wang, Hongqiang Tailoring Low-Dimensional Phases for Improved Performance of 2D-3D Tin Perovskite Solar Cells Journal Article ACS Materials Letters, 6 (1), pp. 1 – 9, 2024, ISSN: 26394979, (Cited by: 3). Abstract | Links | BibTeX | Tags: Efficiency; Perovskite; Tin; Titanium nitride; Defects density; Device performance; Homoserine lactones; Lead-free perovskites; Low-dimensional phasis; Performance; Perovskite films; Precursor solutions; Transport performance; Ultra-thin; Perovskite solar cells @article{Kang20241, title = {Tailoring Low-Dimensional Phases for Improved Performance of 2D-3D Tin Perovskite Solar Cells}, author = {Ziyong Kang and Yu Tong and Kun Wang and Yali Chen and Peng Yan and Guangjiu Pan and Peter Müller-Buschbaum and Lu Zhang and Yang Yang and Jiandong Wu and Haijiao Xie and Shengzhong Liu and Hongqiang Wang}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85181018682&doi=10.1021%2facsmaterialslett.3c00929&partnerID=40&md5=33d2f41ede233f1b22168434e254337d}, doi = {10.1021/acsmaterialslett.3c00929}, issn = {26394979}, year = {2024}, date = {2024-01-01}, journal = {ACS Materials Letters}, volume = {6}, number = {1}, pages = {1 – 9}, publisher = {American Chemical Society}, abstract = {2D-3D tin perovskites are considered as promising candidates for realizing efficient lead-free perovskite solar cells (PSCs). However, the ultrathin 2D phases could unfavorably affect charge transport and device performance. In the present work, we demonstrate that the introduction of D-homoserine lactone hydrochloride (D-HLH) can tailor the low-dimensional phases and improve the quality of 2D-3D tin perovskite films. The functional group in D-HLH can interact with FA+ and I- as well as Sn2+ in the precursor solution. These interactions not only affect the formation of tin perovskite film and favor the formation of thicker 2D phases but also decrease the defect density and suppress the nonradiative recombination. As a result, the efficiency of tin PSCs is significantly improved from 7.97 to 12.45%, and the stability of the device is also enhanced. This work provides a feasible strategy to regulate the low-dimensional phases in 2D-3D tin PSCs toward realizing high efficiency. © 2023 American Chemical Society.}, note = {Cited by: 3}, keywords = {Efficiency; Perovskite; Tin; Titanium nitride; Defects density; Device performance; Homoserine lactones; Lead-free perovskites; Low-dimensional phasis; Performance; Perovskite films; Precursor solutions; Transport performance; Ultra-thin; Perovskite solar cells}, pubstate = {published}, tppubtype = {article} } 2D-3D tin perovskites are considered as promising candidates for realizing efficient lead-free perovskite solar cells (PSCs). However, the ultrathin 2D phases could unfavorably affect charge transport and device performance. In the present work, we demonstrate that the introduction of D-homoserine lactone hydrochloride (D-HLH) can tailor the low-dimensional phases and improve the quality of 2D-3D tin perovskite films. The functional group in D-HLH can interact with FA+ and I- as well as Sn2+ in the precursor solution. These interactions not only affect the formation of tin perovskite film and favor the formation of thicker 2D phases but also decrease the defect density and suppress the nonradiative recombination. As a result, the efficiency of tin PSCs is significantly improved from 7.97 to 12.45%, and the stability of the device is also enhanced. This work provides a feasible strategy to regulate the low-dimensional phases in 2D-3D tin PSCs toward realizing high efficiency. © 2023 American Chemical Society. |
Lu, Wenzheng; Menezes, Leonardo De S; Tittl, Andreas; Ren, Haoran; Maier, Stefan A Active Huygens' metasurface based on in-situ grown conductive polymer Journal Article Nanophotonics, 13 (1), pp. 39 – 49, 2024, ISSN: 21928614, (Cited by: 4; All Open Access, Gold Open Access). Abstract | Links | BibTeX | Tags: Nanoantennas; Optical radar; Active metasurface; Beam-steering; Conductive Polymer; Electrical switching; Huygens; Metasurface; Nanoantennae; Optical efficiency; Situ grown; Switching speed; Efficiency @article{Lu202439, title = {Active Huygens' metasurface based on in-situ grown conductive polymer}, author = {Wenzheng Lu and Leonardo De S Menezes and Andreas Tittl and Haoran Ren and Stefan A Maier}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85180982631&doi=10.1515%2fnanoph-2023-0562&partnerID=40&md5=b85fb65df1761b8185f91a063cf64def}, doi = {10.1515/nanoph-2023-0562}, issn = {21928614}, year = {2024}, date = {2024-01-01}, journal = {Nanophotonics}, volume = {13}, number = {1}, pages = {39 – 49}, publisher = {Walter de Gruyter GmbH}, abstract = {Active metasurfaces provide unique advantages for on-demand light manipulation at a subwavelength scale for emerging visual applications of displays, holographic projectors, optical sensors, light detection and ranging (LiDAR). These applications put stringent requirements on switching speed, cycling duration, electro-optical controllability, modulation contrast, optical efficiency and operation voltages. However, previous demonstrations focus only on particular subsets of these key performance requirements for device implementation, while the other performance metrics have remained too low for any practical use. Here, we demonstrate an active Huygens' metasurface based on conductive polyaniline (PANI), which can be in-situ grown and optimized on the metasurface. We have achieved simultaneously on the active metasurface switching speed of 60 frame per second (fps), switching duration of more than 2000 switching cycles without noticeable degradation, hysteresis-free controllability over intermediate states, modulation contrast of over 1400 %, optical efficiency of 28 % and operation voltage range within 1 V. Such PANI-powered active metasurface design can be readily incorporated into other metasurface concepts to deliver high-reliability electrical control over its optical response, paving the way for compact and robust electro-optic metadevices. © 2023 the author(s), published by De Gruyter, Berlin/Boston.}, note = {Cited by: 4; All Open Access, Gold Open Access}, keywords = {Nanoantennas; Optical radar; Active metasurface; Beam-steering; Conductive Polymer; Electrical switching; Huygens; Metasurface; Nanoantennae; Optical efficiency; Situ grown; Switching speed; Efficiency}, pubstate = {published}, tppubtype = {article} } Active metasurfaces provide unique advantages for on-demand light manipulation at a subwavelength scale for emerging visual applications of displays, holographic projectors, optical sensors, light detection and ranging (LiDAR). These applications put stringent requirements on switching speed, cycling duration, electro-optical controllability, modulation contrast, optical efficiency and operation voltages. However, previous demonstrations focus only on particular subsets of these key performance requirements for device implementation, while the other performance metrics have remained too low for any practical use. Here, we demonstrate an active Huygens' metasurface based on conductive polyaniline (PANI), which can be in-situ grown and optimized on the metasurface. We have achieved simultaneously on the active metasurface switching speed of 60 frame per second (fps), switching duration of more than 2000 switching cycles without noticeable degradation, hysteresis-free controllability over intermediate states, modulation contrast of over 1400 %, optical efficiency of 28 % and operation voltage range within 1 V. Such PANI-powered active metasurface design can be readily incorporated into other metasurface concepts to deliver high-reliability electrical control over its optical response, paving the way for compact and robust electro-optic metadevices. © 2023 the author(s), published by De Gruyter, Berlin/Boston. |
Wolz, Lukas M; Grötzner, Gabriel; Rieth, Tim; Wagner, Laura I; Kuhl, Matthias; Dittloff, Johannes; Zhou, Guanda; Santra, Saswati; Streibel, Verena; Munnik, Frans; Sharp, Ian D; Eichhorn, Johanna Impact of Defects and Disorder on the Stability of Ta3N5 Photoanodes Journal Article Advanced Functional Materials, 2024, ISSN: 1616301X, (Cited by: 0; All Open Access, Hybrid Gold Open Access). Abstract | Links | BibTeX | Tags: Functional materials; Nitrogen compounds; Oxidation; Oxygen; Point defects; Tantalum compounds; Thin films; Deep-level defects; Defect concentrations; High oxygens; Oxygen content; Photo-anodes; Photoelectrode; Structural ordering; Ta3N5 photoelectrode; Thin-films; Water splitting; Stability @article{Wolz2024, title = {Impact of Defects and Disorder on the Stability of Ta3N5 Photoanodes}, author = {Lukas M Wolz and Gabriel Grötzner and Tim Rieth and Laura I Wagner and Matthias Kuhl and Johannes Dittloff and Guanda Zhou and Saswati Santra and Verena Streibel and Frans Munnik and Ian D Sharp and Johanna Eichhorn}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85198074227&doi=10.1002%2fadfm.202405532&partnerID=40&md5=cd0b1af1d85e3ab9bce8ba5e4f75117b}, doi = {10.1002/adfm.202405532}, issn = {1616301X}, year = {2024}, date = {2024-01-01}, journal = {Advanced Functional Materials}, publisher = {John Wiley and Sons Inc}, abstract = {The photoelectrochemical performance of Ta3N5 photoanodes is strongly impacted by the presence of shallow and deep defects within the bandgap. However, the role of such states in defining stability under operational conditions is not well understood. Here, a highly controllable synthesis approach is used to create homogenous Ta3N5 thin films with tailored defect concentrations to establish the relationship between atomic-scale point defects and macroscale stability. Reduced oxygen contents increase long-range structural order but lead to high concentrations of deep-level states, while higher oxygen contents result in reduced structural order but beneficially passivate deep-level defects. Despite the different defect properties, the synthesized photoelectrodes degrade similarly under water oxidation conditions due to the formation of a surface oxide layer that blocks interfacial hole injection and accelerates charge recombination. In contrast, under ferrocyanide oxidation conditions, it is found that Ta3N5 films with high oxygen concentrations exhibit long-term stability, whereas those possessing lower oxygen contents and higher deep-level defect concentrations rapidly degrade. These results indicate that deep-level defects result in rapid trapping of photocarriers and surface oxidation but that shallow oxygen donors can be introduced into Ta3N5 to enable kinetic stabilization of the interface. © 2024 The Author(s). Advanced Functional Materials published by Wiley-VCH GmbH.}, note = {Cited by: 0; All Open Access, Hybrid Gold Open Access}, keywords = {Functional materials; Nitrogen compounds; Oxidation; Oxygen; Point defects; Tantalum compounds; Thin films; Deep-level defects; Defect concentrations; High oxygens; Oxygen content; Photo-anodes; Photoelectrode; Structural ordering; Ta3N5 photoelectrode; Thin-films; Water splitting; Stability}, pubstate = {published}, tppubtype = {article} } The photoelectrochemical performance of Ta3N5 photoanodes is strongly impacted by the presence of shallow and deep defects within the bandgap. However, the role of such states in defining stability under operational conditions is not well understood. Here, a highly controllable synthesis approach is used to create homogenous Ta3N5 thin films with tailored defect concentrations to establish the relationship between atomic-scale point defects and macroscale stability. Reduced oxygen contents increase long-range structural order but lead to high concentrations of deep-level states, while higher oxygen contents result in reduced structural order but beneficially passivate deep-level defects. Despite the different defect properties, the synthesized photoelectrodes degrade similarly under water oxidation conditions due to the formation of a surface oxide layer that blocks interfacial hole injection and accelerates charge recombination. In contrast, under ferrocyanide oxidation conditions, it is found that Ta3N5 films with high oxygen concentrations exhibit long-term stability, whereas those possessing lower oxygen contents and higher deep-level defect concentrations rapidly degrade. These results indicate that deep-level defects result in rapid trapping of photocarriers and surface oxidation but that shallow oxygen donors can be introduced into Ta3N5 to enable kinetic stabilization of the interface. © 2024 The Author(s). Advanced Functional Materials published by Wiley-VCH GmbH. |
Sirotti, Elise; Wagner, Laura I; Jiang, Chang-Ming; Eichhorn, Johanna; Munnik, Frans; Streibel, Verena; Schilcher, Maximilian J; März, Benjamin; Hegner, Franziska S; Kuhl, Matthias; Höldrich, Theresa; Müller-Caspary, Knut; Egger, David A; Sharp, Ian D Beyond Cation Disorder: Site Symmetry-Tuned Optoelectronic Properties of the Ternary Nitride Photoabsorber ZrTaN3 Journal Article Advanced Energy Materials, 2024, ISSN: 16146832, (Cited by: 0; All Open Access, Hybrid Gold Open Access). Abstract | Links | BibTeX | Tags: @article{Sirotti2024b, title = {Beyond Cation Disorder: Site Symmetry-Tuned Optoelectronic Properties of the Ternary Nitride Photoabsorber ZrTaN3}, author = {Elise Sirotti and Laura I Wagner and Chang-Ming Jiang and Johanna Eichhorn and Frans Munnik and Verena Streibel and Maximilian J Schilcher and Benjamin März and Franziska S Hegner and Matthias Kuhl and Theresa Höldrich and Knut Müller-Caspary and David A Egger and Ian D Sharp}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85200045654&doi=10.1002%2faenm.202402540&partnerID=40&md5=0920a3af1e49a334c8428c4809cec323}, doi = {10.1002/aenm.202402540}, issn = {16146832}, year = {2024}, date = {2024-01-01}, journal = {Advanced Energy Materials}, publisher = {John Wiley and Sons Inc}, abstract = {Ternary nitrides are rapidly emerging as promising compounds for optoelectronic and energy conversion applications, yet comparatively little of this vast composition space has been explored. Furthermore, the crystal structures of these compounds can exhibit a significant amount of disorder, the consequences of which are not yet well understood. Here, the deposition of bixbyite-type ZrTaN3 thin films is demonstrated by reactive magnetron co-sputtering and observed semiconducting character, with a strong optical absorption onset at 1.8 eV and significant photoactivity, with prospective application as functional photoanodes. It is found that Wyckoff-site occupancy of cations is a critical factor in determining these beneficial optoelectronic properties. First-principles calculations show that cation disorder leads to minor deviations in the total energy but modulates the bandgap by 0.5 eV, changing orbital hybridization of valence and conduction band states. In addition to demonstrating that ZrTaN3 is a promising visible light-absorbing semiconductor and active photoanode material, the findings provide important insights regarding the role of cation ordering on the electronic structure of ternary semiconductors. In particular, it is shown that not only cation order, but also the cationic Wyckoff site occupancy has a substantial impact on key optoelectronic properties, which can guide future design and synthesis of advanced semiconductors. © 2024 The Author(s). Advanced Energy Materials published by Wiley-VCH GmbH.}, note = {Cited by: 0; All Open Access, Hybrid Gold Open Access}, keywords = {}, pubstate = {published}, tppubtype = {article} } Ternary nitrides are rapidly emerging as promising compounds for optoelectronic and energy conversion applications, yet comparatively little of this vast composition space has been explored. Furthermore, the crystal structures of these compounds can exhibit a significant amount of disorder, the consequences of which are not yet well understood. Here, the deposition of bixbyite-type ZrTaN3 thin films is demonstrated by reactive magnetron co-sputtering and observed semiconducting character, with a strong optical absorption onset at 1.8 eV and significant photoactivity, with prospective application as functional photoanodes. It is found that Wyckoff-site occupancy of cations is a critical factor in determining these beneficial optoelectronic properties. First-principles calculations show that cation disorder leads to minor deviations in the total energy but modulates the bandgap by 0.5 eV, changing orbital hybridization of valence and conduction band states. In addition to demonstrating that ZrTaN3 is a promising visible light-absorbing semiconductor and active photoanode material, the findings provide important insights regarding the role of cation ordering on the electronic structure of ternary semiconductors. In particular, it is shown that not only cation order, but also the cationic Wyckoff site occupancy has a substantial impact on key optoelectronic properties, which can guide future design and synthesis of advanced semiconductors. © 2024 The Author(s). Advanced Energy Materials published by Wiley-VCH GmbH. |
Li, Zerui; Li, Yunan; Zhang, Jinsheng; Guo, Renjun; Sun, Kun; Jiang, Xiongzhuo; Wang, Peixi; Tu, Suo; Schwartzkopf, Matthias; Li, Zhiyun; Ma, Chang-Qi; Müller-Buschbaum, Peter Suppressed Degradation Process of Green-Solvent Based Organic Solar Cells Through ZnO Modification With Sulfhydryl Derivatives Journal Article Advanced Energy Materials, 2024, ISSN: 16146832, (Cited by: 0; All Open Access, Hybrid Gold Open Access). Abstract | Links | BibTeX | Tags: @article{Li2024e, title = {Suppressed Degradation Process of Green-Solvent Based Organic Solar Cells Through ZnO Modification With Sulfhydryl Derivatives}, author = {Zerui Li and Yunan Li and Jinsheng Zhang and Renjun Guo and Kun Sun and Xiongzhuo Jiang and Peixi Wang and Suo Tu and Matthias Schwartzkopf and Zhiyun Li and Chang-Qi Ma and Peter Müller-Buschbaum}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85202596295&doi=10.1002%2faenm.202402920&partnerID=40&md5=db8ab8d81b70ecba894744a882d82441}, doi = {10.1002/aenm.202402920}, issn = {16146832}, year = {2024}, date = {2024-01-01}, journal = {Advanced Energy Materials}, publisher = {John Wiley and Sons Inc}, abstract = {The interface of organic solar cells plays a crucial role in device performance and stability. Several investigations demonstrated that the interface will affect the morphology and microstructure of the active layer, which is important for device performance. Here, several mercaptan derivatives are explored in green-solvent based organic solar cells (PBDB-TF-T1: BTP-4F-12) as effective stabilization modifiers on ZnO. Operando grazing-incidence wide/small-angle X-ray scattering (GIWAXS/GISAXS) provides a deep understanding of the degradation process during operation. The degradation process is driven by a compression of the molecule stacking as well as a decrease in the donor crystallinity, besides the known decomposition of the acceptor at the interface. Solar cell degradation comprises three stages, where an unexpected component from the acceptor appears in the second stage, simultaneously with a shapely shrinking micro-structure. Furthermore, the interface modifier pentaerythritol tetrakis(3-mercapto-propionate) (PETMP) stabilizes the crystallinity of the donor as well as suppresses the decomposition of the acceptor, thus improving the device stability. The modification effect is caused by the interaction between Zn and S from the sulfhydryl groups of the mercaptan derivatives. Thus, studies of changes in the active layer morphology extend the knowledge from ex situ characterizations, broadening the understanding of the degradation mechanisms. © 2024 The Author(s). Advanced Energy Materials published by Wiley-VCH GmbH.}, note = {Cited by: 0; All Open Access, Hybrid Gold Open Access}, keywords = {}, pubstate = {published}, tppubtype = {article} } The interface of organic solar cells plays a crucial role in device performance and stability. Several investigations demonstrated that the interface will affect the morphology and microstructure of the active layer, which is important for device performance. Here, several mercaptan derivatives are explored in green-solvent based organic solar cells (PBDB-TF-T1: BTP-4F-12) as effective stabilization modifiers on ZnO. Operando grazing-incidence wide/small-angle X-ray scattering (GIWAXS/GISAXS) provides a deep understanding of the degradation process during operation. The degradation process is driven by a compression of the molecule stacking as well as a decrease in the donor crystallinity, besides the known decomposition of the acceptor at the interface. Solar cell degradation comprises three stages, where an unexpected component from the acceptor appears in the second stage, simultaneously with a shapely shrinking micro-structure. Furthermore, the interface modifier pentaerythritol tetrakis(3-mercapto-propionate) (PETMP) stabilizes the crystallinity of the donor as well as suppresses the decomposition of the acceptor, thus improving the device stability. The modification effect is caused by the interaction between Zn and S from the sulfhydryl groups of the mercaptan derivatives. Thus, studies of changes in the active layer morphology extend the knowledge from ex situ characterizations, broadening the understanding of the degradation mechanisms. © 2024 The Author(s). Advanced Energy Materials published by Wiley-VCH GmbH. |
Sun, Kun; Guo, Renjun; Liu, Shangpu; Guo, Dengyang; Jiang, Xiongzhuo; Huber, Linus F; Liang, Yuxin; Reus, Manuel A; Li, Zerui; Guan, Tianfu; Zhou, Jungui; Schwartzkopf, Matthias; Stranks, Samuel D; Deschler, Felix; Müller-Buschbaum, Peter Deciphering Structure and Charge Carrier Behavior in Reduced-Dimensional Perovskites Journal Article Advanced Functional Materials, 2024, ISSN: 1616301X, (Cited by: 0; All Open Access, Hybrid Gold Open Access). Abstract | Links | BibTeX | Tags: @article{Sun2024, title = {Deciphering Structure and Charge Carrier Behavior in Reduced-Dimensional Perovskites}, author = {Kun Sun and Renjun Guo and Shangpu Liu and Dengyang Guo and Xiongzhuo Jiang and Linus F Huber and Yuxin Liang and Manuel A Reus and Zerui Li and Tianfu Guan and Jungui Zhou and Matthias Schwartzkopf and Samuel D Stranks and Felix Deschler and Peter Müller-Buschbaum}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85202489750&doi=10.1002%2fadfm.202411153&partnerID=40&md5=cf3c95c8ed46c49393ce0f5de0f64520}, doi = {10.1002/adfm.202411153}, issn = {1616301X}, year = {2024}, date = {2024-01-01}, journal = {Advanced Functional Materials}, publisher = {John Wiley and Sons Inc}, abstract = {Reduced-dimensional perovskites (RDPs) have advanced perovskite optoelectronic devices due to their tunable energy landscape, structure, and orientation. However, the origin of structural and photophysical property changes when moving from low-dimensional to high-dimensional RDPs remains to be understood. This study systematically reveals structural and photophysical properties of slot-die-coated Dion-Jacobson (DJ) and Ruddlesden-Popper (RP) RDPs with different dimensionalities. RP RDPs with lower dimensionality (n = 2) exhibit a dominant n = 2 phase, preferential out-of-plane orientation, and longer charge carrier lifetime compared with DJ RDPs. In addition, the formation kinetics of RDPs with higher dimensionality (n = 4) are unraveled by in situ X-ray scattering, showing the favorable formation of the lower-n phase in RP RDPs. The formation of these lower-n phases is thermodynamically and stoichiometrically favored, while these phases are likely in the form of an “intermediate phase” which bridges the 3D-like and lower-n phases in DJ RDPs. DJ RDPs with higher dimensionality demonstrate comparable phase purity, preferential orientation, spatially vertical phase homogeneity, and longer charge carrier lifetime. As such, DJ-based perovskite solar cells (PSCs) (n = 4) demonstrate better photostability under operational conditions than RP-based PSCs. Thus, the work paves the way for the utilization of RDPs to upscale PSCs. © 2024 The Author(s). Advanced Functional Materials published by Wiley-VCH GmbH.}, note = {Cited by: 0; All Open Access, Hybrid Gold Open Access}, keywords = {}, pubstate = {published}, tppubtype = {article} } Reduced-dimensional perovskites (RDPs) have advanced perovskite optoelectronic devices due to their tunable energy landscape, structure, and orientation. However, the origin of structural and photophysical property changes when moving from low-dimensional to high-dimensional RDPs remains to be understood. This study systematically reveals structural and photophysical properties of slot-die-coated Dion-Jacobson (DJ) and Ruddlesden-Popper (RP) RDPs with different dimensionalities. RP RDPs with lower dimensionality (n = 2) exhibit a dominant n = 2 phase, preferential out-of-plane orientation, and longer charge carrier lifetime compared with DJ RDPs. In addition, the formation kinetics of RDPs with higher dimensionality (n = 4) are unraveled by in situ X-ray scattering, showing the favorable formation of the lower-n phase in RP RDPs. The formation of these lower-n phases is thermodynamically and stoichiometrically favored, while these phases are likely in the form of an “intermediate phase” which bridges the 3D-like and lower-n phases in DJ RDPs. DJ RDPs with higher dimensionality demonstrate comparable phase purity, preferential orientation, spatially vertical phase homogeneity, and longer charge carrier lifetime. As such, DJ-based perovskite solar cells (PSCs) (n = 4) demonstrate better photostability under operational conditions than RP-based PSCs. Thus, the work paves the way for the utilization of RDPs to upscale PSCs. © 2024 The Author(s). Advanced Functional Materials published by Wiley-VCH GmbH. |
Hungenberg, Julian; Hochgesang, Adrian; Meichsner, Florian; Thelakkat, Mukundan Self-Doped Mixed Ionic-Electronic Conductors to Tune the Threshold Voltage and the Mode of Operation in Organic Electrochemical Transistors Journal Article Advanced Functional Materials, 2024, ISSN: 1616301X, (Cited by: 0; All Open Access, Hybrid Gold Open Access). Abstract | Links | BibTeX | Tags: @article{Hungenberg2024, title = {Self-Doped Mixed Ionic-Electronic Conductors to Tune the Threshold Voltage and the Mode of Operation in Organic Electrochemical Transistors}, author = {Julian Hungenberg and Adrian Hochgesang and Florian Meichsner and Mukundan Thelakkat}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85199366751&doi=10.1002%2fadfm.202407067&partnerID=40&md5=e507f7fe2d70666e3bcced9838e54c3b}, doi = {10.1002/adfm.202407067}, issn = {1616301X}, year = {2024}, date = {2024-01-01}, journal = {Advanced Functional Materials}, publisher = {John Wiley and Sons Inc}, abstract = {Organic mixed ionic-electronic conductors with tunable doping, low threshold voltages, and air stability are crucial for bioelectronic applications. A homopolymer based on an alkoxy thiophene monomer and its copolymer with a thiophene carrying ethylene glycol side chains are synthesized and converted to self-doped conjugated polyelectrolytes, P3HOTS-TMA+, and P3HOTS-TMA+-co-P3MEEET. The self-doping occurs during the conversion to polyelectrolytes. Both polyelectrolytes show high electrical conductivity without any external dopants. UV–Vis–NIR spectroscopy and spectroelectrochemistry confirm excellent air stability of the doped state. In an organic electrochemical transistor (OECT), the P3HOTS-TMA+ operates in depletion mode, while P3HOTS-TMA+-co-P3MEEET exhibits accumulation mode of operation with low threshold voltage, both showing fast response times. On the other hand, the non-doped homopolymer, P3MEEET, shows a high negative threshold voltage in accumulation mode. Thus, copolymerization with the self-dopable monomer changes the mode of operation as well as the threshold voltage substantially. Ultraviolet photoelectron spectroscopy reveals a considerable reduction of the hole injection barrier for the self-doped system P3HOTS-TMA+. Mott-Schottky analysis shows reduction in charge carrier concentration in the copolymer compared to the homopolymer. Thus, the copolymerization strategy with a self-dopable monomer is an efficient tool for tuning the degree of doping leading to low threshold voltage in OECTs. © 2024 The Author(s). Advanced Functional Materials published by Wiley-VCH GmbH.}, note = {Cited by: 0; All Open Access, Hybrid Gold Open Access}, keywords = {}, pubstate = {published}, tppubtype = {article} } Organic mixed ionic-electronic conductors with tunable doping, low threshold voltages, and air stability are crucial for bioelectronic applications. A homopolymer based on an alkoxy thiophene monomer and its copolymer with a thiophene carrying ethylene glycol side chains are synthesized and converted to self-doped conjugated polyelectrolytes, P3HOTS-TMA+, and P3HOTS-TMA+-co-P3MEEET. The self-doping occurs during the conversion to polyelectrolytes. Both polyelectrolytes show high electrical conductivity without any external dopants. UV–Vis–NIR spectroscopy and spectroelectrochemistry confirm excellent air stability of the doped state. In an organic electrochemical transistor (OECT), the P3HOTS-TMA+ operates in depletion mode, while P3HOTS-TMA+-co-P3MEEET exhibits accumulation mode of operation with low threshold voltage, both showing fast response times. On the other hand, the non-doped homopolymer, P3MEEET, shows a high negative threshold voltage in accumulation mode. Thus, copolymerization with the self-dopable monomer changes the mode of operation as well as the threshold voltage substantially. Ultraviolet photoelectron spectroscopy reveals a considerable reduction of the hole injection barrier for the self-doped system P3HOTS-TMA+. Mott-Schottky analysis shows reduction in charge carrier concentration in the copolymer compared to the homopolymer. Thus, the copolymerization strategy with a self-dopable monomer is an efficient tool for tuning the degree of doping leading to low threshold voltage in OECTs. © 2024 The Author(s). Advanced Functional Materials published by Wiley-VCH GmbH. |
Aigner, Andreas; Weber, Thomas; Wester, Alwin; Maier, Stefan A; Tittl, Andreas Continuous spectral and coupling-strength encoding with dual-gradient metasurfaces Journal Article Nature Nanotechnology, 2024, ISSN: 17483387, (Cited by: 0; All Open Access, Hybrid Gold Open Access). Abstract | Links | BibTeX | Tags: Molecular recognition; Photocatalysis; Coupling strengths; Encodings; Light-matter interactions; Metasurface; Nano scale; Parameter spaces; Quality factors; Spectral feature; Spectral overlap; Two parameter; absorption; article; pharmaceutics; photocatalysis; photon; solid state; Chemical sensors @article{Aigner2024b, title = {Continuous spectral and coupling-strength encoding with dual-gradient metasurfaces}, author = {Andreas Aigner and Thomas Weber and Alwin Wester and Stefan A Maier and Andreas Tittl}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85202055547&doi=10.1038%2fs41565-024-01767-2&partnerID=40&md5=42bcf5a02280697e22de3f6008310232}, doi = {10.1038/s41565-024-01767-2}, issn = {17483387}, year = {2024}, date = {2024-01-01}, journal = {Nature Nanotechnology}, publisher = {Nature Research}, abstract = {To control and enhance light–matter interactions at the nanoscale, two parameters are central: the spectral overlap between an optical cavity mode and the material’s spectral features (for example, excitonic or molecular absorption lines), and the quality factor of the cavity. Controlling both parameters simultaneously would enable the investigation of systems with complex spectral features, such as multicomponent molecular mixtures or heterogeneous solid-state materials. So far, it has been possible only to sample a limited set of data points within this two-dimensional parameter space. Here we introduce a nanophotonic approach that can simultaneously and continuously encode the spectral and quality-factor parameter space within a compact spatial area. We use a dual-gradient metasurface design composed of a two-dimensional array of smoothly varying subwavelength nanoresonators, each supporting a unique mode based on symmetry-protected bound states in the continuum. This results in 27,500 distinct modes and a mode density approaching the theoretical upper limit for metasurfaces. By applying our platform to surface-enhanced molecular spectroscopy, we find that the optimal quality factor for maximum sensitivity depends on the amount of analyte, enabling effective molecular detection regardless of analyte concentration within a single dual-gradient metasurface. Our design provides a method to analyse the complete spectral and coupling-strength parameter space of complex material systems for applications such as photocatalysis, chemical sensing and entangled photon generation. © The Author(s) 2024.}, note = {Cited by: 0; All Open Access, Hybrid Gold Open Access}, keywords = {Molecular recognition; Photocatalysis; Coupling strengths; Encodings; Light-matter interactions; Metasurface; Nano scale; Parameter spaces; Quality factors; Spectral feature; Spectral overlap; Two parameter; absorption; article; pharmaceutics; photocatalysis; photon; solid state; Chemical sensors}, pubstate = {published}, tppubtype = {article} } To control and enhance light–matter interactions at the nanoscale, two parameters are central: the spectral overlap between an optical cavity mode and the material’s spectral features (for example, excitonic or molecular absorption lines), and the quality factor of the cavity. Controlling both parameters simultaneously would enable the investigation of systems with complex spectral features, such as multicomponent molecular mixtures or heterogeneous solid-state materials. So far, it has been possible only to sample a limited set of data points within this two-dimensional parameter space. Here we introduce a nanophotonic approach that can simultaneously and continuously encode the spectral and quality-factor parameter space within a compact spatial area. We use a dual-gradient metasurface design composed of a two-dimensional array of smoothly varying subwavelength nanoresonators, each supporting a unique mode based on symmetry-protected bound states in the continuum. This results in 27,500 distinct modes and a mode density approaching the theoretical upper limit for metasurfaces. By applying our platform to surface-enhanced molecular spectroscopy, we find that the optimal quality factor for maximum sensitivity depends on the amount of analyte, enabling effective molecular detection regardless of analyte concentration within a single dual-gradient metasurface. Our design provides a method to analyse the complete spectral and coupling-strength parameter space of complex material systems for applications such as photocatalysis, chemical sensing and entangled photon generation. © The Author(s) 2024. |
Zhang, Kaicheng; Liu, Chao; Peng, Zijian; Li, Chaohui; Tian, Jingjing; Li, Canru; Cerrillo, José Garcia; Dong, Lirong; Streller, Fabian; Späth, Andreas; Musiienko, Artem; Englhard, Jonas; Li, Ning; Zhang, Jiyun; Du, Tian; Sathasivam, Sanjayan; Macdonald, Thomas J; These, Albert; Corre, Vincent Le M; Forberich, Karen; Meng, Wei; Fink, Rainer H; Osvet, Andres; Lüer, Larry; Bachmann, Julien; Tong, Jinhui; Brabec, Christoph J Binary cations minimize energy loss in the wide-band-gap perovskite toward efficient all-perovskite tandem solar cells Journal Article Joule, 2024, ISSN: 25424351, (Cited by: 0). Abstract | Links | BibTeX | Tags: @article{Zhang2024c, title = {Binary cations minimize energy loss in the wide-band-gap perovskite toward efficient all-perovskite tandem solar cells}, author = {Kaicheng Zhang and Chao Liu and Zijian Peng and Chaohui Li and Jingjing Tian and Canru Li and José Garcia Cerrillo and Lirong Dong and Fabian Streller and Andreas Späth and Artem Musiienko and Jonas Englhard and Ning Li and Jiyun Zhang and Tian Du and Sanjayan Sathasivam and Thomas J Macdonald and Albert These and Vincent M Le Corre and Karen Forberich and Wei Meng and Rainer H Fink and Andres Osvet and Larry Lüer and Julien Bachmann and Jinhui Tong and Christoph J Brabec}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85201705955&doi=10.1016%2fj.joule.2024.07.003&partnerID=40&md5=4f7fd2d1af7276ca125d440e37938fe5}, doi = {10.1016/j.joule.2024.07.003}, issn = {25424351}, year = {2024}, date = {2024-01-01}, journal = {Joule}, publisher = {Cell Press}, abstract = {Perovskite-based tandem solar cells stand at the forefront of photovoltaic innovation due to their exceptional performance and cost-effective fabrication. This study focuses on minimizing energy losses within a 1.80 eV perovskite sub-cell. We demonstrate that the surface treatment of perovskite with binary guanidinium bromide and 4-fluorophenylammonium iodide synergistically reduces defect densities and adjusts interfacial energy-level alignment. The enhanced passivation effect and the formation of a surface dipole significantly reduce nonradiative recombination and transport losses, leading to a notable increase in the open-circuit voltage and fill factor product, thereby achieving an impressive power conversion efficiency (PCE) of 19.0%. The reproducibility of these findings is confirmed by consistent results across different laboratories. Furthermore, integration with a narrow-band-gap perovskite yields an all-perovskite tandem device with a PCE of 27.2%. This comprehensive understanding of the pivotal role of spacer cations in surface treatment significantly advances the pathway toward efficient perovskite photovoltaics. © 2024 Elsevier Inc.}, note = {Cited by: 0}, keywords = {}, pubstate = {published}, tppubtype = {article} } Perovskite-based tandem solar cells stand at the forefront of photovoltaic innovation due to their exceptional performance and cost-effective fabrication. This study focuses on minimizing energy losses within a 1.80 eV perovskite sub-cell. We demonstrate that the surface treatment of perovskite with binary guanidinium bromide and 4-fluorophenylammonium iodide synergistically reduces defect densities and adjusts interfacial energy-level alignment. The enhanced passivation effect and the formation of a surface dipole significantly reduce nonradiative recombination and transport losses, leading to a notable increase in the open-circuit voltage and fill factor product, thereby achieving an impressive power conversion efficiency (PCE) of 19.0%. The reproducibility of these findings is confirmed by consistent results across different laboratories. Furthermore, integration with a narrow-band-gap perovskite yields an all-perovskite tandem device with a PCE of 27.2%. This comprehensive understanding of the pivotal role of spacer cations in surface treatment significantly advances the pathway toward efficient perovskite photovoltaics. © 2024 Elsevier Inc. |
Arslanova, Ksenija; Ganswindt, Patrick; Lorenzen, Tizian; Kostyurina, Ekaterina; Karaghiosoff, Konstantin; Nickel, Bert; Müller-Caspary, Knut; Urban, Alexander S Synthesis of Cs3Cu2I5 Nanocrystals in a Continuous Flow System Journal Article Small, 2024, ISSN: 16136810, (Cited by: 0; All Open Access, Hybrid Gold Open Access). Abstract | Links | BibTeX | Tags: @article{Arslanova2024, title = {Synthesis of Cs3Cu2I5 Nanocrystals in a Continuous Flow System}, author = {Ksenija Arslanova and Patrick Ganswindt and Tizian Lorenzen and Ekaterina Kostyurina and Konstantin Karaghiosoff and Bert Nickel and Knut Müller-Caspary and Alexander S Urban}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85198390458&doi=10.1002%2fsmll.202403572&partnerID=40&md5=00d5643d09a0ac08b39bce2f64dec47c}, doi = {10.1002/smll.202403572}, issn = {16136810}, year = {2024}, date = {2024-01-01}, journal = {Small}, publisher = {John Wiley and Sons Inc}, abstract = {Achieving the goal of generating all of the world's energy via renewable sources and significantly reducing the energy usage will require the development of novel, abundant, nontoxic energy conversion materials. Here, a cost-efficient and scalable continuous flow synthesis of Cs3Cu2I5 nanocrystals is developed as a basis for the rapid advancement of novel nanomaterials. Ideal precursor solutions are obtained through a novel batch synthesis, whose product served as a benchmark for the subsequent flow synthesis. Realizing this setup enabled a reproducible fabrication of Cs3Cu2I5 nanocrystals. The effect of volumetric flow rate and temperature on the final product's morphology and optical properties are determined, obtaining 21% quantum yield with the optimal configuration. Consequently, the size and morphology of the nanocrystals can be tuned with far more precision and in a much broader range than previously achievable. The flow setup is readily applicable to other relevant nanomaterials. It should enable a rapid determination of a material's potential and subsequently optimize its desired properties for renewable energy generation or efficient optoelectronics. © 2024 The Author(s). Small published by Wiley-VCH GmbH.}, note = {Cited by: 0; All Open Access, Hybrid Gold Open Access}, keywords = {}, pubstate = {published}, tppubtype = {article} } Achieving the goal of generating all of the world's energy via renewable sources and significantly reducing the energy usage will require the development of novel, abundant, nontoxic energy conversion materials. Here, a cost-efficient and scalable continuous flow synthesis of Cs3Cu2I5 nanocrystals is developed as a basis for the rapid advancement of novel nanomaterials. Ideal precursor solutions are obtained through a novel batch synthesis, whose product served as a benchmark for the subsequent flow synthesis. Realizing this setup enabled a reproducible fabrication of Cs3Cu2I5 nanocrystals. The effect of volumetric flow rate and temperature on the final product's morphology and optical properties are determined, obtaining 21% quantum yield with the optimal configuration. Consequently, the size and morphology of the nanocrystals can be tuned with far more precision and in a much broader range than previously achievable. The flow setup is readily applicable to other relevant nanomaterials. It should enable a rapid determination of a material's potential and subsequently optimize its desired properties for renewable energy generation or efficient optoelectronics. © 2024 The Author(s). Small published by Wiley-VCH GmbH. |
Kang, Ziyong; Wang, Kun; Zhang, Lu; Yang, Yang; Wu, Jiandong; Tong, Yu; Yan, Peng; Chen, Yali; Qi, Heng; Sun, Kun; Müller-Buschbaum, Peter; Zhang, Xuewen; Shang, Jingzhi; Wang, Hongqiang Homogenizing The Low-Dimensional Phases for Stable 2D-3D Tin Perovskite Solar Cells Journal Article Small, 2024, ISSN: 16136810, (Cited by: 0). Abstract | Links | BibTeX | Tags: @article{Kang2024c, title = {Homogenizing The Low-Dimensional Phases for Stable 2D-3D Tin Perovskite Solar Cells}, author = {Ziyong Kang and Kun Wang and Lu Zhang and Yang Yang and Jiandong Wu and Yu Tong and Peng Yan and Yali Chen and Heng Qi and Kun Sun and Peter Müller-Buschbaum and Xuewen Zhang and Jingzhi Shang and Hongqiang Wang}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85197519682&doi=10.1002%2fsmll.202402028&partnerID=40&md5=596cfebd32154af1fbc81a021fabdbc5}, doi = {10.1002/smll.202402028}, issn = {16136810}, year = {2024}, date = {2024-01-01}, journal = {Small}, publisher = {John Wiley and Sons Inc}, abstract = {2D-3D tin-based perovskites are considered as promising candidates for achieving efficient lead-free perovskite solar cells (PSCs). However, the existence of multiple low-dimensional phases formed during the film preparation hinders the efficient transport of charge carriers. In addition, the non-homogeneous distribution of low-dimensional phases leads to lattice distortion and increases the defect density, which are undesirable for the stability of tin-based PSCs. Here, mixed spacer cations [diethylamine (DEA+) and phenethylamine (PEA+)] are introduced into tin perovskite films to modulate the distribution of the 2D phases. It is found that compared to the film with only PEA+, the combination of DEA+ and PEA+ favors the formation of homogeneous low-dimensional perovskite phases with three octahedral monolayers (n = 3), especially near the bottom interface between perovskite and hole transport layer. The homogenization of 2D phases help improve the film quality with reduced lattice distortion and released strain. With these merits, the tin PSC shows significantly improved stability with 94% of its initial efficiency retained after storing in a nitrogen atmosphere for over 4600 h, and over 80% efficiency maintained after continuous illumination for 400 h. © 2024 Wiley-VCH GmbH.}, note = {Cited by: 0}, keywords = {}, pubstate = {published}, tppubtype = {article} } 2D-3D tin-based perovskites are considered as promising candidates for achieving efficient lead-free perovskite solar cells (PSCs). However, the existence of multiple low-dimensional phases formed during the film preparation hinders the efficient transport of charge carriers. In addition, the non-homogeneous distribution of low-dimensional phases leads to lattice distortion and increases the defect density, which are undesirable for the stability of tin-based PSCs. Here, mixed spacer cations [diethylamine (DEA+) and phenethylamine (PEA+)] are introduced into tin perovskite films to modulate the distribution of the 2D phases. It is found that compared to the film with only PEA+, the combination of DEA+ and PEA+ favors the formation of homogeneous low-dimensional perovskite phases with three octahedral monolayers (n = 3), especially near the bottom interface between perovskite and hole transport layer. The homogenization of 2D phases help improve the film quality with reduced lattice distortion and released strain. With these merits, the tin PSC shows significantly improved stability with 94% of its initial efficiency retained after storing in a nitrogen atmosphere for over 4600 h, and over 80% efficiency maintained after continuous illumination for 400 h. © 2024 Wiley-VCH GmbH. |
Zou, Yuqin; Song, Qili; Zhou, Jungui; Yin, Shanshan; Li, Yanan; Apfelbeck, Fabian A C; Zheng, Tianle; Fung, Man-Keung; Mu, Cheng; Müller-Buschbaum, Peter Ammonium Sulfate to Modulate Crystallization for High-Performance Rigid and Flexible Perovskite Solar Cells Journal Article Small, 2024, ISSN: 16136810, (Cited by: 0). Abstract | Links | BibTeX | Tags: @article{Zou2024c, title = {Ammonium Sulfate to Modulate Crystallization for High-Performance Rigid and Flexible Perovskite Solar Cells}, author = {Yuqin Zou and Qili Song and Jungui Zhou and Shanshan Yin and Yanan Li and Fabian A C Apfelbeck and Tianle Zheng and Man-Keung Fung and Cheng Mu and Peter Müller-Buschbaum}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85191834414&doi=10.1002%2fsmll.202401456&partnerID=40&md5=f3bb1a2131cb975eaa85d793053bbed2}, doi = {10.1002/smll.202401456}, issn = {16136810}, year = {2024}, date = {2024-01-01}, journal = {Small}, publisher = {John Wiley and Sons Inc}, abstract = {Perovskite solar cells (PSCs) are attracting widespread research and attention as highly promising candidates in the field of electronic photovoltaics owing to their exceptional power conversion efficiency (PCE). However, rigid or flexible PSCs still face challenges in preparing full-coverage and low-defect perovskite films, as well as achieving highly reproducible and highly stable devices. Herein, a multifunctional additive 2-aminoethyl hydrogen sulfate (AES) is designed to regulate the film crystallization and thereby form flat and pinhole-free perovskite films. It is found that the introduction of AES can effectively passivate defects, restrain charge carrier recombination, and then achieve a higher fill factor. As seen with grazing incidence wide-angle X-ray scattering (GIWAXS), this approach does not affect the crystal orientation distribution. It is observed that AES addition shows a universality across different perovskite components since the PCE is improved up to 20.7% for FA0.97MA0.03Pb(I0.97Br0.03)3-AES, 22.85% for Cs0.05FA0.95PbI3-AES, 22.23% for FAPbI2.7Br0.3-AES, and 23.32% for FAPI-AES rigid devices. Remarkably, the non-encapsulated flexible Cs0.05 (FA0.85MA0.15)0.95Pb(I0.85Br0.15)3 device with AES additive delivers a PCE of 20.1% and maintains over 97% of its initial efficiency under ambient conditions (25 ± 5% relative humidity) over 2280 h of aging. © 2024 The Authors. Small published by Wiley-VCH GmbH.}, note = {Cited by: 0}, keywords = {}, pubstate = {published}, tppubtype = {article} } Perovskite solar cells (PSCs) are attracting widespread research and attention as highly promising candidates in the field of electronic photovoltaics owing to their exceptional power conversion efficiency (PCE). However, rigid or flexible PSCs still face challenges in preparing full-coverage and low-defect perovskite films, as well as achieving highly reproducible and highly stable devices. Herein, a multifunctional additive 2-aminoethyl hydrogen sulfate (AES) is designed to regulate the film crystallization and thereby form flat and pinhole-free perovskite films. It is found that the introduction of AES can effectively passivate defects, restrain charge carrier recombination, and then achieve a higher fill factor. As seen with grazing incidence wide-angle X-ray scattering (GIWAXS), this approach does not affect the crystal orientation distribution. It is observed that AES addition shows a universality across different perovskite components since the PCE is improved up to 20.7% for FA0.97MA0.03Pb(I0.97Br0.03)3-AES, 22.85% for Cs0.05FA0.95PbI3-AES, 22.23% for FAPbI2.7Br0.3-AES, and 23.32% for FAPI-AES rigid devices. Remarkably, the non-encapsulated flexible Cs0.05 (FA0.85MA0.15)0.95Pb(I0.85Br0.15)3 device with AES additive delivers a PCE of 20.1% and maintains over 97% of its initial efficiency under ambient conditions (25 ± 5% relative humidity) over 2280 h of aging. © 2024 The Authors. Small published by Wiley-VCH GmbH. |
Shen, Guibin; Li, Xin; Zou, Yuqin; Dong, Hongye; Zhu, Dongping; Jiang, Yanglin; Ng, Xin Ren; Lin, Fen; Müller-Buschbaum, Peter; Mu, Cheng High-Performance and Large-Area Inverted Perovskite Solar Cells Based on NiOx Films Enabled with A Novel Microstructure-Control Technology Journal Article Energy and Environmental Materials, 7 (1), 2024, ISSN: 25750348, (Cited by: 2; All Open Access, Hybrid Gold Open Access). Abstract | Links | BibTeX | Tags: @article{Shen2024, title = {High-Performance and Large-Area Inverted Perovskite Solar Cells Based on NiOx Films Enabled with A Novel Microstructure-Control Technology}, author = {Guibin Shen and Xin Li and Yuqin Zou and Hongye Dong and Dongping Zhu and Yanglin Jiang and Xin Ren Ng and Fen Lin and Peter Müller-Buschbaum and Cheng Mu}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85146311402&doi=10.1002%2feem2.12504&partnerID=40&md5=898f1a69605b2ff9be18105958ee4a77}, doi = {10.1002/eem2.12504}, issn = {25750348}, year = {2024}, date = {2024-01-01}, journal = {Energy and Environmental Materials}, volume = {7}, number = {1}, publisher = {John Wiley and Sons Inc}, abstract = {The improvement in the efficiency of inverted perovskite solar cells (PSCs) is significantly limited by undesirable contact at the NiOX/perovskite interface. In this study, a novel microstructure-control technology is proposed for fabrication of porous NiOX films using Pluronic P123 as the structure-directing agent and acetylacetone (AcAc) as the coordination agent. The synthesized porous NiOX films enhanced the hole extraction efficiency and reduced recombination defects at the NiOX/perovskite interface. Consequently, without any modification, the power conversion efficiency (PCE) of the PSC with MAPbI3 as the absorber layer improved from 16.50% to 19.08%. Moreover, the PCE of the device composed of perovskite Cs0.05(MA0.15FA0.85)0.95Pb(I0.85Br0.15)3 improved from 17.49% to 21.42%. Furthermore, the application of the fabricated porous NiOX on fluorine-doped tin oxide (FTO) substrates enabled the fabrication of large-area PSCs (1.2 cm2) with a PCE of 19.63%. This study provides a novel strategy for improving the contact at the NiOX/perovskite interface for the fabrication of high-performance large-area perovskite solar cells. © 2022 The Authors. Energy & Environmental Materials published by John Wiley & Sons Australia, Ltd on behalf of Zhengzhou University.}, note = {Cited by: 2; All Open Access, Hybrid Gold Open Access}, keywords = {}, pubstate = {published}, tppubtype = {article} } The improvement in the efficiency of inverted perovskite solar cells (PSCs) is significantly limited by undesirable contact at the NiOX/perovskite interface. In this study, a novel microstructure-control technology is proposed for fabrication of porous NiOX films using Pluronic P123 as the structure-directing agent and acetylacetone (AcAc) as the coordination agent. The synthesized porous NiOX films enhanced the hole extraction efficiency and reduced recombination defects at the NiOX/perovskite interface. Consequently, without any modification, the power conversion efficiency (PCE) of the PSC with MAPbI3 as the absorber layer improved from 16.50% to 19.08%. Moreover, the PCE of the device composed of perovskite Cs0.05(MA0.15FA0.85)0.95Pb(I0.85Br0.15)3 improved from 17.49% to 21.42%. Furthermore, the application of the fabricated porous NiOX on fluorine-doped tin oxide (FTO) substrates enabled the fabrication of large-area PSCs (1.2 cm2) with a PCE of 19.63%. This study provides a novel strategy for improving the contact at the NiOX/perovskite interface for the fabrication of high-performance large-area perovskite solar cells. © 2022 The Authors. Energy & Environmental Materials published by John Wiley & Sons Australia, Ltd on behalf of Zhengzhou University. |
2023 |
Schröder, Dennis; Neuber, Christian; Mansfeld, Ulrich; Kreger, Klaus; Schmidt, Hans-Werner Mesostructured Nonwovens with Supramolecular Tricycloquinazoline Nanofibers as Heterogenous Photocatalyst Journal Article Small Science, 2023. Links | BibTeX | Tags: heterogenous, mesostructured, nanofibers, nonwovens, photocatalyst, supramolecular, tricycloqinazoline @article{Schröder2023, title = {Mesostructured Nonwovens with Supramolecular Tricycloquinazoline Nanofibers as Heterogenous Photocatalyst}, author = {Dennis Schröder and Christian Neuber and Ulrich Mansfeld and Klaus Kreger and Hans-Werner Schmidt}, doi = {10.1002/smsc.202300160}, year = {2023}, date = {2023-12-10}, journal = {Small Science}, keywords = {heterogenous, mesostructured, nanofibers, nonwovens, photocatalyst, supramolecular, tricycloqinazoline}, pubstate = {published}, tppubtype = {article} } |
Xu, Junyi; Luo, Junsheng; Gubanov, Kirill; Barabash, Anastasiia; Fink, Rainer H; Heumüller, Thomas; Brabec, Christoph J Doping of Mesoscopic Charge Extraction Layers Enables the Design of Long-Time Stable Organic Solar Cells Journal Article ACS Energy Letters, 2023. Links | BibTeX | Tags: organic solar cells @article{Xu2023, title = {Doping of Mesoscopic Charge Extraction Layers Enables the Design of Long-Time Stable Organic Solar Cells}, author = {Junyi Xu and Junsheng Luo and Kirill Gubanov and Anastasiia Barabash and Rainer H Fink and Thomas Heumüller and Christoph J Brabec}, doi = {10.1021/acsenergylett.3c02087}, year = {2023}, date = {2023-12-04}, journal = {ACS Energy Letters}, keywords = {organic solar cells}, pubstate = {published}, tppubtype = {article} } |
Christis, Maximilian; Henning, Alex; Bartl, Johannes D; Zeidler, Andreas; Rieger, Bernhard; Stutzmann, Martin; Sharp, Ian D Annealing-Free Ohmic Contacts to n-Type GaN via Hydrogen Plasma-Assisted Atomic Layer Deposition of Sub-Nanometer AlOx Journal Article Advanced Materials Interfaces, 2023. Links | BibTeX | Tags: hydrogen, sub-nanometer @article{Christis2023, title = {Annealing-Free Ohmic Contacts to n-Type GaN via Hydrogen Plasma-Assisted Atomic Layer Deposition of Sub-Nanometer AlOx}, author = {Maximilian Christis and Alex Henning and Johannes D. Bartl and Andreas Zeidler and Bernhard Rieger and Martin Stutzmann and Ian D. Sharp}, doi = {10.1002/admi.202300758}, year = {2023}, date = {2023-12-01}, journal = {Advanced Materials Interfaces}, keywords = {hydrogen, sub-nanometer}, pubstate = {published}, tppubtype = {article} } |
Tu, Suo; Tian, Ting; Vagias, Apostolos; Huber, Linus F; Liu, Liangzhen; Liang, Suzhe; Fischer, Roland A; Bernstorff, Sigrid; and, Peter Müller-Buschbaum Elsevier, 2023. Links | BibTeX | Tags: polymer conductors @article{Tu2023, title = {Modulation of electronic and ionic conduction in mixed polymer conductors via additive engineering: Towards targeted applications under varying humidity}, author = {Suo Tu and Ting Tian and Apostolos Vagias and Linus F Huber and Liangzhen Liu and Suzhe Liang and Roland A Fischer and Sigrid Bernstorff and Peter Müller-Buschbaum and}, doi = {10.1016/j.cej.2023.147034}, year = {2023}, date = {2023-12-01}, journal = {Elsevier}, keywords = {polymer conductors}, pubstate = {published}, tppubtype = {article} } |
Herran, Matias; Juergensen, Sabrina; Kessens, Moritz; Hoeing, Dominic; Köppen, Andrea; Sousa-Castillo, Ana; Parak, Wolfgang J; Lange, Holger; Reich, Stephanie; Schulz, Florian; Cortes, Emiliano Plasmonic bimetallic two-dimensional supercrystals for H2 generation Journal Article Nature Catalysis, 2023. Links | BibTeX | Tags: bimetallic, plasmonic, supercrystals @article{Herran2023, title = {Plasmonic bimetallic two-dimensional supercrystals for H2 generation}, author = {Matias Herran and Sabrina Juergensen and Moritz Kessens and Dominic Hoeing and Andrea Köppen and Ana Sousa-Castillo and Wolfgang J. Parak and Holger Lange and Stephanie Reich and Florian Schulz and Emiliano Cortes}, doi = {10.1038/s41929-023-01053-9}, year = {2023}, date = {2023-11-30}, journal = {Nature Catalysis}, keywords = {bimetallic, plasmonic, supercrystals}, pubstate = {published}, tppubtype = {article} } |
Guo, Renjun; Xiong, Qiu; Ulatowski, Aleksander; Li, Saisai; Ding, Zijin; Xiao, Tianxiao; Liang, Suzhe; Heger, Julian E; Guan, Tianfu; Jiang, Xinyu; Sun, Kun; Reb, Lennar K; Reus, Manuel A; Chumakov, Andrei; Schwartzkopf, Matthias; Yuan, Minjian; Hou, Yi; Roth, Stephan V; Herz, Laura M; Gao, Peng; and, Peter Müller-Buschbaum Trace Water in Lead Iodide Affecting Perovskite Crystal Nucleation Limits the Performance of Perovskite Solar Cells Journal Article Advanced Materials, 2023. Links | BibTeX | Tags: nucleation, perovskite, solar cells @article{Guo2023b, title = {Trace Water in Lead Iodide Affecting Perovskite Crystal Nucleation Limits the Performance of Perovskite Solar Cells}, author = {Renjun Guo and Qiu Xiong and Aleksander Ulatowski and Saisai Li and Zijin Ding and Tianxiao Xiao and Suzhe Liang and Julian E Heger and Tianfu Guan and Xinyu Jiang and Kun Sun and Lennar K Reb and Manuel A Reus and Andrei Chumakov and Matthias Schwartzkopf and Minjian Yuan and Yi Hou and Stephan V Roth and Laura M Herz and Peng Gao and Peter Müller-Buschbaum and}, doi = {10.1002/adma.202310237}, year = {2023}, date = {2023-11-27}, journal = {Advanced Materials}, keywords = {nucleation, perovskite, solar cells}, pubstate = {published}, tppubtype = {article} } |
Kang, Ziyong; Tong, Yu; Wang, Kun; Chen, Yali; Yan, Peng; Pan, Guangjiu; Müller-Buschbaum, Peter; and Zhang, Lu; Yang, Yang; Wu, Jiandong; Xie, Haijiao; Liu, Shengzhong; Wang, Hongqiang Tailoring Low-Dimensional Phases for Improved Performance of 2D–3D Tin Perovskite Solar Cells Journal Article ACS Materials Letters, 2023. Links | BibTeX | Tags: perovskite, perovskite solar cells @article{Kang2023b, title = {Tailoring Low-Dimensional Phases for Improved Performance of 2D–3D Tin Perovskite Solar Cells}, author = {Ziyong Kang and Yu Tong and Kun Wang and Yali Chen and Peng Yan and Guangjiu Pan and Peter Müller-Buschbaum and and Lu Zhang and Yang Yang and Jiandong Wu and Haijiao Xie and Shengzhong Liu and Hongqiang Wang}, doi = {10.1021/acsmaterialslett.3c00929}, year = {2023}, date = {2023-11-22}, journal = {ACS Materials Letters}, keywords = {perovskite, perovskite solar cells}, pubstate = {published}, tppubtype = {article} } |
Hooijer, Rik; Weis, Andreas; Kaiser, Waldemar; Biewald, Alexander; Dörflinger, Patrick; Maheu, Clemént; Arsatiants, Oleksandr; Helminger, David; Dyakonov, Vladimir; Hartschuh, Achim; Mosconi, Edoardo; Angelis, Filippo De; Bein, Thomas Cu/Ag–Sb–I Rudorffite Thin Films for Photovoltaic Applications Journal Article Chem. Mater., 2023. Links | BibTeX | Tags: photovoltaic, rudorffite @article{Hooijer2023, title = {Cu/Ag–Sb–I Rudorffite Thin Films for Photovoltaic Applications}, author = {Rik Hooijer and Andreas Weis and Waldemar Kaiser and Alexander Biewald and Patrick Dörflinger and Clemént Maheu and Oleksandr Arsatiants and David Helminger and Vladimir Dyakonov and Achim Hartschuh and Edoardo Mosconi and Filippo De Angelis and Thomas Bein}, doi = {10.1021/acs.chemmater.3c01837}, year = {2023}, date = {2023-11-16}, journal = {Chem. Mater.}, keywords = {photovoltaic, rudorffite}, pubstate = {published}, tppubtype = {article} } |
Stankevych, Andrei; Saxena, Rishabh; Grüne, Jeannine; Lulei, Sebastian; Sperlich, Andreas; Athanasopoulos, Stavros; Vakhnin, Alexander; Sahay, Prakhar; Brütting, Wolfgang; Dyakonov, Vladimir; Bässler, Heinz; Köhler, Anna; Kadashchuk, Andrey Charge-carrier photogeneration in single-component organic carbazole-based semiconductors via low-excitation-power triplet-triplet annihilation Journal Article Phys. Rev. Applied, 2023. BibTeX | Tags: annihilation, carbazole-based, low-excitation-power, photogeneration, semiconductors, triplet @article{Stankevych2023, title = {Charge-carrier photogeneration in single-component organic carbazole-based semiconductors via low-excitation-power triplet-triplet annihilation}, author = {Andrei Stankevych and Rishabh Saxena and Jeannine Grüne and Sebastian Lulei and Andreas Sperlich and Stavros Athanasopoulos and Alexander Vakhnin and Prakhar Sahay and Wolfgang Brütting and Vladimir Dyakonov and Heinz Bässler and Anna Köhler and Andrey Kadashchuk}, year = {2023}, date = {2023-11-16}, journal = {Phys. Rev. Applied}, keywords = {annihilation, carbazole-based, low-excitation-power, photogeneration, semiconductors, triplet}, pubstate = {published}, tppubtype = {article} } |
Ezendam, Simone; Gargiulo, Julian; Sousa-Castillo, Ana; Lee, Joong Bum; Nam, Yoon Sung; Maier, Stefan A; Cortes, Emiliano Spatial Distributions of Single-Molecule Reactivity in Plasmonic Catalysis Journal Article ACS Nano, 2023. Links | BibTeX | Tags: catalysis, molecule, plasmonic, spatial @article{Ezendam2023, title = {Spatial Distributions of Single-Molecule Reactivity in Plasmonic Catalysis}, author = {Simone Ezendam and Julian Gargiulo and Ana Sousa-Castillo and Joong Bum Lee and Yoon Sung Nam and Stefan A Maier and Emiliano Cortes}, doi = {10.1021/acsnano.3c07833}, year = {2023}, date = {2023-11-16}, journal = {ACS Nano}, keywords = {catalysis, molecule, plasmonic, spatial}, pubstate = {published}, tppubtype = {article} } |
Oechsle, Anna Lena; Schöner, Tobias; Geiger, Christina; Tu, Suo; Wang, Peixi; Cubitt, Robert; and, Peter Müller-Buschbaum Macromulecules, 2023. Links | BibTeX | Tags: ionic liquid, polyfilms @article{Oechsle2023b, title = {Unraveling the Humidity Influence on the Electrical Properties of Ionic Liquid Posttreated Poly(3,4-ethylene dioxythiophene):Poly(styrenesulfonate) Films}, author = {Anna Lena Oechsle and Tobias Schöner and Christina Geiger and Suo Tu and Peixi Wang and Robert Cubitt and Peter Müller-Buschbaum and}, doi = {10.1021/acs.macromol.3c01842}, year = {2023}, date = {2023-11-14}, journal = {Macromulecules}, keywords = {ionic liquid, polyfilms}, pubstate = {published}, tppubtype = {article} } |
Guan, Tianfu; Chen, Wei; Tan, Haodong; Li, Dong; Wang, Xiao; Weindl, Christian L; Wang, Yawen; Liang, Zhiqiang; Liang, Suzhe; Xiao, Tianxiao; Tu, Suo; Roth, Stephan V; Jiang, Lin; and, Peter Müller-Buschbaum Decoding the Self-Assembly Plasmonic Interface Structure in a PbS Colloidal Quantum Dot Solid for a Photodetector Journal Article ACs Nano, 2023. Links | BibTeX | Tags: colloidal, photodetector, plasmonic @article{Guan2023b, title = {Decoding the Self-Assembly Plasmonic Interface Structure in a PbS Colloidal Quantum Dot Solid for a Photodetector}, author = {Tianfu Guan and Wei Chen and Haodong Tan and Dong Li and Xiao Wang and Christian L Weindl and Yawen Wang and Zhiqiang Liang and Suzhe Liang and Tianxiao Xiao and Suo Tu and Stephan V Roth and Lin Jiang and Peter Müller-Buschbaum and}, doi = {10.1021/acsnano.3c08526}, year = {2023}, date = {2023-11-10}, journal = {ACs Nano}, keywords = {colloidal, photodetector, plasmonic}, pubstate = {published}, tppubtype = {article} } |
Greve, Christopher; Ramming, Philipp; Griesbach, Markus; Leupold, Nico; Moos, Ralf; Köhler, Anna; Herzig, Eva M; Panzer, Fabian; Grüninger, Helen To Stop or to Shuttle Halides? The Role of an Ionic Liquid in Thermal Halide Mixing of Hybrid Perovskites Journal Article ACS Energy Letters, 2023. Links | BibTeX | Tags: hybrid, ionic liquid, perovskites @article{Greve2023b, title = {To Stop or to Shuttle Halides? The Role of an Ionic Liquid in Thermal Halide Mixing of Hybrid Perovskites}, author = {Christopher Greve and Philipp Ramming and Markus Griesbach and Nico Leupold and Ralf Moos and Anna Köhler and Eva M Herzig and Fabian Panzer and Helen Grüninger}, doi = {10.1021/acsenergylett.3c01878}, year = {2023}, date = {2023-11-07}, journal = {ACS Energy Letters}, keywords = {hybrid, ionic liquid, perovskites}, pubstate = {published}, tppubtype = {article} } |
Zhang, Jiyun; Liu, Bowen; Liu, Ziyi; Wu, Jianchang; Arnold, Simon; Shi, Hongyang; Osterrieder, Tobias; Hauch, Jens A; Wu, Zhenni; Luo, Junsheng; Wagner, Jerrit; Berger, Christian G; Stubhan, Tobias; Schmitt, Frederik; Zhang, Kaicheng; Sytnyk, Mykhailo; Heumueller, Thomas; Sutter-Fella, Carolin M; Peters, Ian Marius; Zhao, Yicheng; Brabec, Christoph J Optimizing Perovskite Thin-Film Parameter Spaces with Machine Learning-Guided Robotic Platform for High-Performance Perovskite Solar Cells Journal Article Advanced Energy Materials, 2023. Links | BibTeX | Tags: perovskite, perovskite solar cells @article{Zhang2023c, title = {Optimizing Perovskite Thin-Film Parameter Spaces with Machine Learning-Guided Robotic Platform for High-Performance Perovskite Solar Cells}, author = {Jiyun Zhang and Bowen Liu and Ziyi Liu and Jianchang Wu and Simon Arnold and Hongyang Shi and Tobias Osterrieder and Jens A Hauch and Zhenni Wu and Junsheng Luo and Jerrit Wagner and Christian G. Berger and Tobias Stubhan and Frederik Schmitt and Kaicheng Zhang and Mykhailo Sytnyk and Thomas Heumueller and Carolin M Sutter-Fella and Ian Marius Peters and Yicheng Zhao and Christoph J Brabec}, doi = {10.1002/aenm.202302594}, year = {2023}, date = {2023-11-01}, journal = {Advanced Energy Materials}, keywords = {perovskite, perovskite solar cells}, pubstate = {published}, tppubtype = {article} } |
Refvik, Nils B; Reb, Lennart K; Lindenmeir, Christoph; Jensen, Charles E; Simpson, Howe R J; Vrushabendrakumar, Damini; Shankar, Karthik; Müller-Buschbaum, Peter; and Hegmann, Frank A Characterization of morphology-dependent transport in lead-halide perovskite printed films using time-resolved terahertz spectroscopy Journal Article IEEE Xplore, 2023. Links | BibTeX | Tags: perovskite, spectroscopy, terahertz @article{Refvik2023, title = {Characterization of morphology-dependent transport in lead-halide perovskite printed films using time-resolved terahertz spectroscopy}, author = {Nils B Refvik and Lennart K Reb and Christoph Lindenmeir and Charles E Jensen and Howe R J Simpson and Damini Vrushabendrakumar and Karthik Shankar and Peter Müller-Buschbaum and and Frank A. Hegmann}, doi = {10.1109/IRMMW-THz57677.2023.10299247}, year = {2023}, date = {2023-10-31}, journal = {IEEE Xplore}, keywords = {perovskite, spectroscopy, terahertz}, pubstate = {published}, tppubtype = {article} } |
Alam, Shahidul; Aldosari, Haya; Petoukhoff, Christopher E; Vary, Tomas; Althobaiti, Wejdan; Alqurashi, Maryam; Tang, Hua; Khan, Jafar I; Nadazdy, Vojtech; Müller-Buschbaum, Peter; and Welch, Gregory C; Laquai, Frederick Thermally-Induced Degradation in PM6:Y6-Based Bulk Heterojunction Organic Solar Cells Journal Article Advanced Functional Materials, 2023. Links | BibTeX | Tags: heterojunction, organic solar cells @article{Alam2023, title = {Thermally-Induced Degradation in PM6:Y6-Based Bulk Heterojunction Organic Solar Cells}, author = {Shahidul Alam and Haya Aldosari and Christopher E Petoukhoff and Tomas Vary and Wejdan Althobaiti and Maryam Alqurashi and Hua Tang and Jafar I Khan and Vojtech Nadazdy and Peter Müller-Buschbaum and and Gregory C Welch and Frederick Laquai}, doi = {10.1002/adfm.202308076}, year = {2023}, date = {2023-10-27}, journal = {Advanced Functional Materials}, keywords = {heterojunction, organic solar cells}, pubstate = {published}, tppubtype = {article} } |
Bienek, Oliver; Fuchs, Benedikt; Kuhl, Matthias; Rieth, Tim; Kühne, Julius; Wagner, Laura I; Todenhagen, Lina M; Wolz, Lukas; Henning, Alex; Sharp, Ian D Engineering Defects and Interfaces of Atomic Layer-Deposited TiOx-Protective Coatings for Efficient III–V Semiconductor Photocathodes Journal Article ACS Photonics, 2023. Links | BibTeX | Tags: photocathodes, semiconductor @article{Bienek2023, title = {Engineering Defects and Interfaces of Atomic Layer-Deposited TiOx-Protective Coatings for Efficient III–V Semiconductor Photocathodes}, author = {Oliver Bienek and Benedikt Fuchs and Matthias Kuhl and Tim Rieth and Julius Kühne and Laura I Wagner and Lina M Todenhagen and Lukas Wolz and Alex Henning and Ian D Sharp }, doi = {10.1021/acsphotonics.3c00818}, year = {2023}, date = {2023-10-20}, journal = {ACS Photonics}, keywords = {photocathodes, semiconductor}, pubstate = {published}, tppubtype = {article} } |
Wagner, Laura I; Sirotti, Elise; Brune, Oliver; Grötzner, Gabriel; Eichhorn, Johanna; Santra, Saswati; Munnik, Frans; Olivi, Luca; Pollastri, Simone; Streibel, Verena; Sharp, Ian D Defect Engineering of Ta3N5 Photoanodes: Enhancing Charge Transport and Photoconversion Efficiencies via Ti Doping Journal Article Advanced Functional Materials, 2023. Links | BibTeX | Tags: photoanodes, photoconversion @article{Wagner2023, title = {Defect Engineering of Ta3N5 Photoanodes: Enhancing Charge Transport and Photoconversion Efficiencies via Ti Doping}, author = {Laura I Wagner and Elise Sirotti and Oliver Brune and Gabriel Grötzner and Johanna Eichhorn and Saswati Santra and Frans Munnik and Luca Olivi and Simone Pollastri and Verena Streibel and Ian D. Sharp}, doi = {10.1002/adfm.202306539}, year = {2023}, date = {2023-10-19}, journal = {Advanced Functional Materials}, keywords = {photoanodes, photoconversion}, pubstate = {published}, tppubtype = {article} } |
Jiang, Xinyu; Gillett, Alexander J; Zheng, Tianle; Song, Xin; Heger, Julian E; Sun, Kun; Spanier, Lukas V; Guo, Renjun; Liang, Suzhe; Bernstorff, Sigrid; and, Peter Müller-Buschbaum Energy & Environmental Science, 2023. Links | BibTeX | Tags: organic solar cells @article{Jiang2023b, title = {Operando study of the influence of small molecule acceptors on the morphology induced device degradation of organic solar cells with different degrees of π–π stacking}, author = {Xinyu Jiang and Alexander J Gillett and Tianle Zheng and Xin Song and Julian E Heger and Kun Sun and Lukas V Spanier and Renjun Guo and Suzhe Liang and Sigrid Bernstorff and Peter Müller-Buschbaum and}, doi = {10.1039/D3EE02527F}, year = {2023}, date = {2023-10-18}, journal = {Energy & Environmental Science}, keywords = {organic solar cells}, pubstate = {published}, tppubtype = {article} } |
Gatsios, Christos; Opitz, Andreas; Lungwitz, Dominique; Mansour, Ahmed E; Schultz, Thorsten; Shin, Dongguen; Hammer, Sebastian; Pflaum, Jens; Zhang, Yadong; Barlow, Stephen; Marder, Seth R; Koch, Norbert Surface doping of rubrene single crystals by molecular electron donors and acceptors Journal Article Physical Chemistry Chemical Physics, 2023. Links | BibTeX | Tags: molecular, rubrene @article{Gatsios2023, title = {Surface doping of rubrene single crystals by molecular electron donors and acceptors}, author = {Christos Gatsios and Andreas Opitz and Dominique Lungwitz and Ahmed E Mansour and Thorsten Schultz and Dongguen Shin and Sebastian Hammer and Jens Pflaum and Yadong Zhang and Stephen Barlow and Seth R Marder and Norbert Koch}, doi = {10.1039/D3CP03640E}, year = {2023}, date = {2023-10-17}, journal = {Physical Chemistry Chemical Physics}, keywords = {molecular, rubrene}, pubstate = {published}, tppubtype = {article} } |
Feil, Moritz J; Maier, Thomas L; Golibrzuch, Matthias; Sterr, Andrea C; Becherer, Markus; Krischer, Katharina Characterization of Different Au/Electrolyte Interfaces via In Situ Differential Cyclic Plasmo-Voltammetry Journal Article J. Phys. Chem. C, 2023. Links | BibTeX | Tags: characterization, plasmo-voltammetry @article{Feil2023, title = {Characterization of Different Au/Electrolyte Interfaces via In Situ Differential Cyclic Plasmo-Voltammetry}, author = {Moritz J Feil and Thomas L Maier and Matthias Golibrzuch and Andrea C Sterr and Markus Becherer and Katharina Krischer}, doi = {10.1021/acs.jpcc.3c04727}, year = {2023}, date = {2023-09-28}, journal = {J. Phys. Chem. C}, keywords = {characterization, plasmo-voltammetry}, pubstate = {published}, tppubtype = {article} } |
Oechsle, Anna Lena; Schöner, Tobias; Deville, Lewin; Xiao, Tianxiao; Tian, Ting; Vagias, Apostolos; Bernstorff, Sigrid; and, Peter Müller-Buschbaum Ionic Liquid-Induced Inversion of the Humidity-Dependent Conductivity of Thin PEDOT:PSS Films Journal Article ACS Applied Materials & Interfaces, 2023. Links | BibTeX | Tags: conductivity, humidity, ionic, ionic liquids @article{Oechsle2023, title = {Ionic Liquid-Induced Inversion of the Humidity-Dependent Conductivity of Thin PEDOT:PSS Films}, author = {Anna Lena Oechsle and Tobias Schöner and Lewin Deville and Tianxiao Xiao and Ting Tian and Apostolos Vagias and Sigrid Bernstorff and Peter Müller-Buschbaum and}, doi = {10.1021/acsami.3c08208}, year = {2023}, date = {2023-09-27}, journal = {ACS Applied Materials & Interfaces}, keywords = {conductivity, humidity, ionic, ionic liquids}, pubstate = {published}, tppubtype = {article} } |
Kang, Xinxin; Wang, Dourong; Sun, Kun; Dong, Xue; Hui, Wie; Wang, Baohua; Gu, Lei; Li, Maoxin; Bao, Yaqi; Zhang, Jie; Guo, Renjun; Li, Zerui; Jiang, Xiongzhuo; Müller-Buschbaum, Peter; Song, Lin Unraveling the modification effect at NiOx/perovskite interfaces for efficient and stable inverted perovskite solar cells Journal Article 2023. Links | BibTeX | Tags: perovskite, solar cells @article{Kang2023, title = {Unraveling the modification effect at NiOx/perovskite interfaces for efficient and stable inverted perovskite solar cells}, author = {Xinxin Kang and Dourong Wang and Kun Sun and Xue Dong and Wie Hui and Baohua Wang and Lei Gu and Maoxin Li and Yaqi Bao and Jie Zhang and Renjun Guo and Zerui Li and Xiongzhuo Jiang and Peter Müller-Buschbaum and Lin Song}, doi = {10.1039/D3TA05069F}, year = {2023}, date = {2023-09-26}, keywords = {perovskite, solar cells}, pubstate = {published}, tppubtype = {article} } |
Guo, Renjun; Wang, Xi; Jia, Xiankun; Guo, Xiao; Li, Jia; Li, Zerui; Sun, Kun; Jiang, Xiongzhuo; Alvianto, Ezra; Shi, Zhuojie; Schwartzkopf, Matthias; Müller-Buschbaum, Peter; Hou, Yi Refining the Substrate Surface Morphology for Achieving Efficient Inverted Perovskite Solar Cells Journal Article 2023. Links | BibTeX | Tags: perovskite, solar cells @article{Guo2023, title = {Refining the Substrate Surface Morphology for Achieving Efficient Inverted Perovskite Solar Cells}, author = {Renjun Guo and Xi Wang and Xiankun Jia and Xiao Guo and Jia Li and Zerui Li and Kun Sun and Xiongzhuo Jiang and Ezra Alvianto and Zhuojie Shi and Matthias Schwartzkopf and Peter Müller-Buschbaum and Yi Hou}, doi = {10.1002/aenm.202302280}, year = {2023}, date = {2023-09-25}, keywords = {perovskite, solar cells}, pubstate = {published}, tppubtype = {article} } |
Zou, Yuqin; Bai, Xinyu; Kahmann, Simon; Dai, Linjie; Yuan, Shuai; Yin, Shanshan; Heger, Julian E; Schwartzkopf, Matthias; Roth, Stephan V; Chen, Chun-Chao; Zhang, Jianping; Stranks, Samuel D; Friend, Richard H; and, Peter Müller-Buschbaum A Practical Approach Towards Highly Reproducible And High-Quality Perovskite Films Based on An Aging Treatment Journal Article Advanced Materials, 2023. Links | BibTeX | Tags: perovskite, reproucible @article{Zou2023b, title = {A Practical Approach Towards Highly Reproducible And High-Quality Perovskite Films Based on An Aging Treatment}, author = {Yuqin Zou and Xinyu Bai and Simon Kahmann and Linjie Dai and Shuai Yuan and Shanshan Yin and Julian E. Heger and Matthias Schwartzkopf and Stephan V. Roth and Chun-Chao Chen and Jianping Zhang and Samuel D. Stranks and Richard H Friend and Peter Müller-Buschbaum and}, doi = {10.1002/adma.202307024}, year = {2023}, date = {2023-09-22}, journal = {Advanced Materials}, keywords = {perovskite, reproucible}, pubstate = {published}, tppubtype = {article} } |
Lebeda, Timo; Aschebrock, Thilo; Sun, Jianwei; Leppert, Linn; Kümmel, Stephan Right band gaps for the right reason at low computational cost with a meta-GGA Journal Article Physical Review Materials, 2023. Links | BibTeX | Tags: meta-gga @article{Lebeda2023, title = {Right band gaps for the right reason at low computational cost with a meta-GGA}, author = {Timo Lebeda and Thilo Aschebrock and Jianwei Sun and Linn Leppert and Stephan Kümmel}, doi = {10.1103/PhysRevMaterials.7.093803}, year = {2023}, date = {2023-09-19}, journal = {Physical Review Materials}, keywords = {meta-gga}, pubstate = {published}, tppubtype = {article} } |
Boyko, Marina; Hlukhyy, Viktor; Faessler, Thomas F K7In4As6 and K3InAs2 - Two more Zintl phases showing the rich variety of In-As polyanion structures Journal Article ZAAC, 2023. Links | BibTeX | Tags: in-as polyanion structures @article{Boyko2023, title = {K7In4As6 and K3InAs2 - Two more Zintl phases showing the rich variety of In-As polyanion structures}, author = {Marina Boyko and Viktor Hlukhyy and Thomas F Faessler}, doi = {10.1002/zaac.202300164}, year = {2023}, date = {2023-09-14}, journal = {ZAAC}, keywords = {in-as polyanion structures}, pubstate = {published}, tppubtype = {article} } |
Beck, Christian; Strohriegl, Peter Microwave-Assisted Synthesis of Poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine] (PTAA) with Well-Defined End Groups and Narrow Dispersity Journal Article Organic Materials, 2023. Links | BibTeX | Tags: narrow dispersity, polyamine, synthesis @article{Beck2023, title = {Microwave-Assisted Synthesis of Poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine] (PTAA) with Well-Defined End Groups and Narrow Dispersity}, author = {Christian Beck and Peter Strohriegl}, doi = {10.1055/a-2145-4763}, year = {2023}, date = {2023-09-07}, journal = {Organic Materials}, keywords = {narrow dispersity, polyamine, synthesis}, pubstate = {published}, tppubtype = {article} } |
Reus, Manuel A; Krifa, Ahmed; Akkerman, Quinten A; Biewald, Alexander; Xu, Zehua; Kosbahn, David P; Weindl, Christian L; Feldmann, Jochen; Hartschuh, Achim; and, Peter Müller-Buschbaum Layer-By-Layer Printed Metal Hybrid (Cs:FA)PbI3 Perovskite Nanocrystal Solar Cells Journal Article 2023. Links | BibTeX | Tags: hybrid, perovskite nanocrystals, solar cells @article{Reus2023, title = {Layer-By-Layer Printed Metal Hybrid (Cs:FA)PbI3 Perovskite Nanocrystal Solar Cells}, author = {Manuel A. Reus and Ahmed Krifa and Quinten A Akkerman and Alexander Biewald and Zehua Xu and David P. Kosbahn and Christian L. Weindl and Jochen Feldmann and Achim Hartschuh and Peter Müller-Buschbaum and}, doi = {10.1002/adom.202301008}, year = {2023}, date = {2023-09-01}, keywords = {hybrid, perovskite nanocrystals, solar cells}, pubstate = {published}, tppubtype = {article} } |