Cargando…
Decoupling engineering of formamidinium–cesium perovskites for efficient photovoltaics
Although pure formamidinium iodide perovskite (FAPbI(3)) possesses an optimal gap for photovoltaics, their poor phase stability limits the long-term operational stability of the devices. A promising approach to enhance their phase stability is to incorporate cesium into FAPbI(3). However, state-of-t...
Autores principales: | , , , , , , , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Oxford University Press
2022
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9522398/ https://www.ncbi.nlm.nih.gov/pubmed/36196112 http://dx.doi.org/10.1093/nsr/nwac127 |
_version_ | 1784800057786105856 |
---|---|
author | Chen, Haoran Wang, Yong Fan, Yingping Chen, Yuetian Miao, Yanfeng Qin, Zhixiao Wang, Xingtao Liu, Xiaomin Zhu, Kaicheng Gao, Feng Zhao, Yixin |
author_facet | Chen, Haoran Wang, Yong Fan, Yingping Chen, Yuetian Miao, Yanfeng Qin, Zhixiao Wang, Xingtao Liu, Xiaomin Zhu, Kaicheng Gao, Feng Zhao, Yixin |
author_sort | Chen, Haoran |
collection | PubMed |
description | Although pure formamidinium iodide perovskite (FAPbI(3)) possesses an optimal gap for photovoltaics, their poor phase stability limits the long-term operational stability of the devices. A promising approach to enhance their phase stability is to incorporate cesium into FAPbI(3). However, state-of-the-art formamidinium–cesium (FA–Cs) iodide perovskites demonstrate much worse efficiency compared with FAPbI(3), limited by the different crystallization dynamics of formamidinium and cesium, which result in poor composition homogeneity and high trap densities. We develop a novel strategy of crystallization decoupling processes of formamidinium and cesium via a sequential cesium incorporation approach. As such, we obtain highly reproducible, highly efficient and stable solar cells based on FA(1)(–)(x)Cs(x)PbI(3) (x = 0.05–0.16) films with uniform composition distribution in the nanoscale and low defect densities. We also revealed a new stabilization mechanism for Cs doping to stabilize FAPbI(3), i.e. the incorporation of Cs into FAPbI(3) significantly reduces the electron–phonon coupling strength to suppress ionic migration, thereby improving the stability of FA–Cs-based devices. |
format | Online Article Text |
id | pubmed-9522398 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | Oxford University Press |
record_format | MEDLINE/PubMed |
spelling | pubmed-95223982022-10-03 Decoupling engineering of formamidinium–cesium perovskites for efficient photovoltaics Chen, Haoran Wang, Yong Fan, Yingping Chen, Yuetian Miao, Yanfeng Qin, Zhixiao Wang, Xingtao Liu, Xiaomin Zhu, Kaicheng Gao, Feng Zhao, Yixin Natl Sci Rev Research Article Although pure formamidinium iodide perovskite (FAPbI(3)) possesses an optimal gap for photovoltaics, their poor phase stability limits the long-term operational stability of the devices. A promising approach to enhance their phase stability is to incorporate cesium into FAPbI(3). However, state-of-the-art formamidinium–cesium (FA–Cs) iodide perovskites demonstrate much worse efficiency compared with FAPbI(3), limited by the different crystallization dynamics of formamidinium and cesium, which result in poor composition homogeneity and high trap densities. We develop a novel strategy of crystallization decoupling processes of formamidinium and cesium via a sequential cesium incorporation approach. As such, we obtain highly reproducible, highly efficient and stable solar cells based on FA(1)(–)(x)Cs(x)PbI(3) (x = 0.05–0.16) films with uniform composition distribution in the nanoscale and low defect densities. We also revealed a new stabilization mechanism for Cs doping to stabilize FAPbI(3), i.e. the incorporation of Cs into FAPbI(3) significantly reduces the electron–phonon coupling strength to suppress ionic migration, thereby improving the stability of FA–Cs-based devices. Oxford University Press 2022-07-05 /pmc/articles/PMC9522398/ /pubmed/36196112 http://dx.doi.org/10.1093/nsr/nwac127 Text en © The Author(s) 2022. Published by Oxford University Press on behalf of China Science Publishing & Media Ltd. 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 reuse, distribution, and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Research Article Chen, Haoran Wang, Yong Fan, Yingping Chen, Yuetian Miao, Yanfeng Qin, Zhixiao Wang, Xingtao Liu, Xiaomin Zhu, Kaicheng Gao, Feng Zhao, Yixin Decoupling engineering of formamidinium–cesium perovskites for efficient photovoltaics |
title | Decoupling engineering of formamidinium–cesium perovskites for efficient photovoltaics |
title_full | Decoupling engineering of formamidinium–cesium perovskites for efficient photovoltaics |
title_fullStr | Decoupling engineering of formamidinium–cesium perovskites for efficient photovoltaics |
title_full_unstemmed | Decoupling engineering of formamidinium–cesium perovskites for efficient photovoltaics |
title_short | Decoupling engineering of formamidinium–cesium perovskites for efficient photovoltaics |
title_sort | decoupling engineering of formamidinium–cesium perovskites for efficient photovoltaics |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9522398/ https://www.ncbi.nlm.nih.gov/pubmed/36196112 http://dx.doi.org/10.1093/nsr/nwac127 |
work_keys_str_mv | AT chenhaoran decouplingengineeringofformamidiniumcesiumperovskitesforefficientphotovoltaics AT wangyong decouplingengineeringofformamidiniumcesiumperovskitesforefficientphotovoltaics AT fanyingping decouplingengineeringofformamidiniumcesiumperovskitesforefficientphotovoltaics AT chenyuetian decouplingengineeringofformamidiniumcesiumperovskitesforefficientphotovoltaics AT miaoyanfeng decouplingengineeringofformamidiniumcesiumperovskitesforefficientphotovoltaics AT qinzhixiao decouplingengineeringofformamidiniumcesiumperovskitesforefficientphotovoltaics AT wangxingtao decouplingengineeringofformamidiniumcesiumperovskitesforefficientphotovoltaics AT liuxiaomin decouplingengineeringofformamidiniumcesiumperovskitesforefficientphotovoltaics AT zhukaicheng decouplingengineeringofformamidiniumcesiumperovskitesforefficientphotovoltaics AT gaofeng decouplingengineeringofformamidiniumcesiumperovskitesforefficientphotovoltaics AT zhaoyixin decouplingengineeringofformamidiniumcesiumperovskitesforefficientphotovoltaics |