Steffen Braunger, Laura E. Mundt, Christian Michael Wolff, Mathias Mews, Carolin Rehermann, Marko Jost, Alvaro Tejada, David Eisenhauer, Christiane Becker, Jorge Andres Guerra, Eva Unger, Lars Korte, Dieter Neher, Martin C. Schubert, Bernd Rech, Steve Albrecht
- We report on the formation of wrinkle-patterned surface morphologies in cesium formamidinium-based Cs(x)FA(1-y)Pb(I1-yBry)(3) perovskite compositions with x = 0-0.3 and y = 0-0.3 under various spin-coating conditions. By varying the Cs and Br contents, the perovskite precursor solution concentration and the spin-coating procedure, the occurrence and characteristics of the wrinkle-shaped morphology can be tailored systematically. Cs(0.17)FA(0.83)Pb(I0.83Br0.17)(3) perovskite layers were analyzed regarding their surface roughness, microscopic structure, local and overall composition, and optoelectronic properties. Application of these films in p-i-n perovskite solar cells (PSCs) with indium-doped tin oxide/NiOx/perovskite/C-60/bathocuproine/Cu architecture resulted in up to 15.3 and 17.0% power conversion efficiency for the flat and wrinkled morphology, respectively. Interestingly, we find slightly red-shifted photoluminescence (PL) peaks for wrinkled areas and we are able to directly correlate surface topography with PL peak mapping.We report on the formation of wrinkle-patterned surface morphologies in cesium formamidinium-based Cs(x)FA(1-y)Pb(I1-yBry)(3) perovskite compositions with x = 0-0.3 and y = 0-0.3 under various spin-coating conditions. By varying the Cs and Br contents, the perovskite precursor solution concentration and the spin-coating procedure, the occurrence and characteristics of the wrinkle-shaped morphology can be tailored systematically. Cs(0.17)FA(0.83)Pb(I0.83Br0.17)(3) perovskite layers were analyzed regarding their surface roughness, microscopic structure, local and overall composition, and optoelectronic properties. Application of these films in p-i-n perovskite solar cells (PSCs) with indium-doped tin oxide/NiOx/perovskite/C-60/bathocuproine/Cu architecture resulted in up to 15.3 and 17.0% power conversion efficiency for the flat and wrinkled morphology, respectively. Interestingly, we find slightly red-shifted photoluminescence (PL) peaks for wrinkled areas and we are able to directly correlate surface topography with PL peak mapping. This is attributed to differences in the local grain size, whereas there is no indication for compositional demixing in the films. We show that the perovskite composition, crystallization kinetics, and layer thickness strongly influence the formation of wrinkles which is proposed to be related to the release of compressive strain during perovskite crystallization. Our work helps us to better understand film formation and to further improve the efficiency of PSCs with widely used mixed-perovskite compositions.…
MetadatenAuthor details: | Steffen Braunger, Laura E. Mundt, Christian Michael WolffORCiDGND, Mathias MewsORCiD, Carolin Rehermann, Marko Jost, Alvaro Tejada, David EisenhauerORCiD, Christiane BeckerORCiD, Jorge Andres Guerra, Eva UngerORCiD, Lars Korte, Dieter NeherORCiDGND, Martin C. Schubert, Bernd RechORCiD, Steve Albrecht |
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DOI: | https://doi.org/10.1021/acs.jpcc.8b06459 |
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ISSN: | 1932-7447 |
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ISSN: | 1932-7455 |
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Title of parent work (English): | The journal of physical chemistry : C, Nanomaterials and interfaces |
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Subtitle (English): | the Appearance of Wrinkled Morphology and its Impact on Solar Cell Performance |
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Publisher: | American Chemical Society |
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Place of publishing: | Washington |
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Publication type: | Article |
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Language: | English |
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Year of first publication: | 2018 |
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Publication year: | 2018 |
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Release date: | 2021/10/18 |
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Volume: | 122 |
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Issue: | 30 |
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Number of pages: | 13 |
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First page: | 17123 |
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Last Page: | 17135 |
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Funding institution: | Federal Ministry of Education and Research (BMBF)Federal Ministry of Education & Research (BMBF) [03SF0540, 03X5520]; German Federal Ministry for Economic Affairs and Energy (BMWi) [0324037C]; graduate school HyPerCells from Helmholtz-Center Berlin; graduate school HyPerCells from University of Potsdam; Potsdam Graduate School (PoGS); Vice rectory of Research of the Pontificia Universidad Catolica del Peru [CAP-2018-1-0071, FMII-006-2018]; Alexander von Humboldt FoundationAlexander von Humboldt Foundation |
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Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie |
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DDC classification: | 5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik |
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Peer review: | Referiert |
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