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Performance-limiting formation dynamics in mixed-halide perovskites

Wide-bandgap (WBG) mixed-halide perovskites as the front cell absorber are accomplishing perovskite-based tandem solar cells with over 29% power conversion efficiency. However, their large voltage deficits limit their ultimate performance. Only a handful of studies probe the fundamental mechanisms u...

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Autores principales: Huang, Tianyi, Tan, Shaun, Nuryyeva, Selbi, Yavuz, Ilhan, Babbe, Finn, Zhao, Yepin, Abdelsamie, Maged, Weber, Marc H., Wang, Rui, Houk, Kendall N., Sutter-Fella, Carolin M., Yang, Yang
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Association for the Advancement of Science 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8580316/
https://www.ncbi.nlm.nih.gov/pubmed/34757790
http://dx.doi.org/10.1126/sciadv.abj1799
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author Huang, Tianyi
Tan, Shaun
Nuryyeva, Selbi
Yavuz, Ilhan
Babbe, Finn
Zhao, Yepin
Abdelsamie, Maged
Weber, Marc H.
Wang, Rui
Houk, Kendall N.
Sutter-Fella, Carolin M.
Yang, Yang
author_facet Huang, Tianyi
Tan, Shaun
Nuryyeva, Selbi
Yavuz, Ilhan
Babbe, Finn
Zhao, Yepin
Abdelsamie, Maged
Weber, Marc H.
Wang, Rui
Houk, Kendall N.
Sutter-Fella, Carolin M.
Yang, Yang
author_sort Huang, Tianyi
collection PubMed
description Wide-bandgap (WBG) mixed-halide perovskites as the front cell absorber are accomplishing perovskite-based tandem solar cells with over 29% power conversion efficiency. However, their large voltage deficits limit their ultimate performance. Only a handful of studies probe the fundamental mechanisms underlying the voltage deficits, which remain an unsolved challenge in the field. In this study, we investigate the formation dynamics and defect physics of WBG mixed-halide perovskites in contrast with their corresponding triiodide-based perovskites. Our results show that the inclusion of bromide introduced a halide homogenization process that occurs during the perovskite growth stage from an initial bromide-rich phase toward the final target stoichiometry. We further elucidated a physical model that correlates the role of bromide with the formation dynamics, defect physics, and eventual optoelectronic properties of the film. This work provides a fundamental and unique perspective toward understanding the performance-limiting factors affecting WBG mixed-halide perovskites.
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spelling pubmed-85803162021-11-18 Performance-limiting formation dynamics in mixed-halide perovskites Huang, Tianyi Tan, Shaun Nuryyeva, Selbi Yavuz, Ilhan Babbe, Finn Zhao, Yepin Abdelsamie, Maged Weber, Marc H. Wang, Rui Houk, Kendall N. Sutter-Fella, Carolin M. Yang, Yang Sci Adv Physical and Materials Sciences Wide-bandgap (WBG) mixed-halide perovskites as the front cell absorber are accomplishing perovskite-based tandem solar cells with over 29% power conversion efficiency. However, their large voltage deficits limit their ultimate performance. Only a handful of studies probe the fundamental mechanisms underlying the voltage deficits, which remain an unsolved challenge in the field. In this study, we investigate the formation dynamics and defect physics of WBG mixed-halide perovskites in contrast with their corresponding triiodide-based perovskites. Our results show that the inclusion of bromide introduced a halide homogenization process that occurs during the perovskite growth stage from an initial bromide-rich phase toward the final target stoichiometry. We further elucidated a physical model that correlates the role of bromide with the formation dynamics, defect physics, and eventual optoelectronic properties of the film. This work provides a fundamental and unique perspective toward understanding the performance-limiting factors affecting WBG mixed-halide perovskites. American Association for the Advancement of Science 2021-11-10 /pmc/articles/PMC8580316/ /pubmed/34757790 http://dx.doi.org/10.1126/sciadv.abj1799 Text en Copyright © 2021 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution License 4.0 (CC BY). https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution license (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Physical and Materials Sciences
Huang, Tianyi
Tan, Shaun
Nuryyeva, Selbi
Yavuz, Ilhan
Babbe, Finn
Zhao, Yepin
Abdelsamie, Maged
Weber, Marc H.
Wang, Rui
Houk, Kendall N.
Sutter-Fella, Carolin M.
Yang, Yang
Performance-limiting formation dynamics in mixed-halide perovskites
title Performance-limiting formation dynamics in mixed-halide perovskites
title_full Performance-limiting formation dynamics in mixed-halide perovskites
title_fullStr Performance-limiting formation dynamics in mixed-halide perovskites
title_full_unstemmed Performance-limiting formation dynamics in mixed-halide perovskites
title_short Performance-limiting formation dynamics in mixed-halide perovskites
title_sort performance-limiting formation dynamics in mixed-halide perovskites
topic Physical and Materials Sciences
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8580316/
https://www.ncbi.nlm.nih.gov/pubmed/34757790
http://dx.doi.org/10.1126/sciadv.abj1799
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