Low-Temperature Aging Provides 22% Efficient Bromine-Free and Passivation Layer-Free Planar Perovskite Solar Cells

Low-Temperature Aging Provides 22% Efficient Bromine-Free and Passivation Layer-Free Planar Perovskite Solar Cells

Abstract Previous reports of formamidinium/methylamine (FAMA)-mixed halide perovskite solar cells have focused mainly on controlling the morphology of the perovskite film and its interface—for example, through the inclusion of bromine and surface passivation. In this paper, we describe a new process...

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Main Authors: Xin Wang, Luyao Wang, Tong Shan, Shibing Leng, Hongliang Zhong, Qinye Bao, Zheng-Hong Lu, Lin-Long Deng, Chun-Chao Chen
Format: Article
Language:English
Published: SpringerOpen 2020-04-01
Series:Nano-Micro Letters
Subjects:
Aging growth
Bromine-free
Passivation layer
Lead iodide
Perovskite solar cells
Online Access:http://link.springer.com/article/10.1007/s40820-020-00418-0
id doaj-4d5e93f274894b0287f3b000d0bbe3e5
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spelling doaj-4d5e93f274894b0287f3b000d0bbe3e52020-11-25T03:31:59ZengSpringerOpenNano-Micro Letters2311-67062150-55512020-04-0112111410.1007/s40820-020-00418-0Low-Temperature Aging Provides 22% Efficient Bromine-Free and Passivation Layer-Free Planar Perovskite Solar CellsXin Wang0Luyao Wang1Tong Shan2Shibing Leng3Hongliang Zhong4Qinye Bao5Zheng-Hong Lu6Lin-Long Deng7Chun-Chao Chen8School of Material Science and Engineering, Shanghai Jiao Tong UniversitySchool of Material Science and Engineering, Shanghai Jiao Tong UniversitySchool of Chemistry and Chemical Engineering, Shanghai Jiao Tong UniversitySchool of Material Science and Engineering, Shanghai Jiao Tong UniversitySchool of Chemistry and Chemical Engineering, Shanghai Jiao Tong UniversityKey Laboratory of Solar Materials and Devices, Department of Electronic Science, School of Physics and Electronic Science, East China Normal UniversityDepartment of Materials Science and Engineering, University of TorontoPen-Tung Sah Institute of Micro-Nano Science and Technology, Xiamen UniversitySchool of Material Science and Engineering, Shanghai Jiao Tong UniversityAbstract Previous reports of formamidinium/methylamine (FAMA)-mixed halide perovskite solar cells have focused mainly on controlling the morphology of the perovskite film and its interface—for example, through the inclusion of bromine and surface passivation. In this paper, we describe a new processing pathway for the growth of a high-quality bromine-free FAMAPbI3 halide perovskites via the control of intermediate phase. Through low-temperature aging growth (LTAG) of a freshly deposited perovskite film, α-phase perovskites can be seeded in the intermediate phase and, at the same time, prevent beta-phase perovskite to nucleate. After postannealing, large grain-size perovskites with significantly reduced PbI2 presence on the surface can be obtained, thereby eliminating the need of additional surface passivation step. Our pristine LTAG-treated solar cells could provide PCEs of greater than 22% without elaborate use of bromine or an additional passivation layer. More importantly, when using this LTAG process, the growth of the pure alpha-phase FAMAPbI3 was highly reproducible.http://link.springer.com/article/10.1007/s40820-020-00418-0Aging growthBromine-freePassivation layerLead iodidePerovskite solar cells
collection DOAJ
language English
format Article
sources DOAJ
author Xin Wang
Luyao Wang
Tong Shan
Shibing Leng
Hongliang Zhong
Qinye Bao
Zheng-Hong Lu
Lin-Long Deng
Chun-Chao Chen
spellingShingle Xin Wang
Luyao Wang
Tong Shan
Shibing Leng
Hongliang Zhong
Qinye Bao
Zheng-Hong Lu
Lin-Long Deng
Chun-Chao Chen
Low-Temperature Aging Provides 22% Efficient Bromine-Free and Passivation Layer-Free Planar Perovskite Solar Cells
Nano-Micro Letters
Aging growth
Bromine-free
Passivation layer
Lead iodide
Perovskite solar cells
author_facet Xin Wang
Luyao Wang
Tong Shan
Shibing Leng
Hongliang Zhong
Qinye Bao
Zheng-Hong Lu
Lin-Long Deng
Chun-Chao Chen
author_sort Xin Wang
title Low-Temperature Aging Provides 22% Efficient Bromine-Free and Passivation Layer-Free Planar Perovskite Solar Cells
title_short Low-Temperature Aging Provides 22% Efficient Bromine-Free and Passivation Layer-Free Planar Perovskite Solar Cells
title_full Low-Temperature Aging Provides 22% Efficient Bromine-Free and Passivation Layer-Free Planar Perovskite Solar Cells
title_fullStr Low-Temperature Aging Provides 22% Efficient Bromine-Free and Passivation Layer-Free Planar Perovskite Solar Cells
title_full_unstemmed Low-Temperature Aging Provides 22% Efficient Bromine-Free and Passivation Layer-Free Planar Perovskite Solar Cells
title_sort low-temperature aging provides 22% efficient bromine-free and passivation layer-free planar perovskite solar cells
publisher SpringerOpen
series Nano-Micro Letters
issn 2311-6706
2150-5551
publishDate 2020-04-01
description Abstract Previous reports of formamidinium/methylamine (FAMA)-mixed halide perovskite solar cells have focused mainly on controlling the morphology of the perovskite film and its interface—for example, through the inclusion of bromine and surface passivation. In this paper, we describe a new processing pathway for the growth of a high-quality bromine-free FAMAPbI3 halide perovskites via the control of intermediate phase. Through low-temperature aging growth (LTAG) of a freshly deposited perovskite film, α-phase perovskites can be seeded in the intermediate phase and, at the same time, prevent beta-phase perovskite to nucleate. After postannealing, large grain-size perovskites with significantly reduced PbI2 presence on the surface can be obtained, thereby eliminating the need of additional surface passivation step. Our pristine LTAG-treated solar cells could provide PCEs of greater than 22% without elaborate use of bromine or an additional passivation layer. More importantly, when using this LTAG process, the growth of the pure alpha-phase FAMAPbI3 was highly reproducible.
topic Aging growth
Bromine-free
Passivation layer
Lead iodide
Perovskite solar cells
url http://link.springer.com/article/10.1007/s40820-020-00418-0
work_keys_str_mv AT xinwang lowtemperatureagingprovides22efficientbrominefreeandpassivationlayerfreeplanarperovskitesolarcells
AT luyaowang lowtemperatureagingprovides22efficientbrominefreeandpassivationlayerfreeplanarperovskitesolarcells
AT tongshan lowtemperatureagingprovides22efficientbrominefreeandpassivationlayerfreeplanarperovskitesolarcells
AT shibingleng lowtemperatureagingprovides22efficientbrominefreeandpassivationlayerfreeplanarperovskitesolarcells
AT hongliangzhong lowtemperatureagingprovides22efficientbrominefreeandpassivationlayerfreeplanarperovskitesolarcells
AT qinyebao lowtemperatureagingprovides22efficientbrominefreeandpassivationlayerfreeplanarperovskitesolarcells
AT zhenghonglu lowtemperatureagingprovides22efficientbrominefreeandpassivationlayerfreeplanarperovskitesolarcells
AT linlongdeng lowtemperatureagingprovides22efficientbrominefreeandpassivationlayerfreeplanarperovskitesolarcells
AT chunchaochen lowtemperatureagingprovides22efficientbrominefreeandpassivationlayerfreeplanarperovskitesolarcells
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