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Vapor-assisted deposition of highly efficient, stable black-phase FAPbI 3 perovskite solar cells
Author(s) -
Haizhou Lu,
Yuhang Liu,
Paramvir Ahlawat,
Aditya Mishra,
Wolfgang Tress,
Felix T. Eickemeyer,
Yingguo Yang,
Fan Fu,
Zaiwei Wang,
Claudia E. Avalos,
Brian Carlsen,
Anand Agarwalla,
Xin Zhang,
Xiaoguo Li,
Yiqiang Zhan,
Shaik M. Zakeeruddin,
Lyndon Emsley,
Ursula Röthlisberger,
LiRong Zheng,
Anders Hagfeldt,
Michaël Grätzel
Publication year - 2020
Publication title -
science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 12.556
H-Index - 1186
eISSN - 1095-9203
pISSN - 0036-8075
DOI - 10.1126/science.abb8985
Subject(s) - formamidinium , energy conversion efficiency , perovskite (structure) , phase (matter) , materials science , deposition (geology) , chemical vapor deposition , vapor phase , chemical engineering , optoelectronics , chemistry , crystallography , physics , organic chemistry , geology , thermodynamics , paleontology , sediment , engineering
Moving a perovskite into the black The bandgap of the black α-phase FAPbI3 (where FA is formamidinium) is nearly ideal for solar cells, but it is unstable with respect to the photoinactive yellow δ-phase. Luet al. found that a film of the yellow phase was converted to a highly crystalline black phase by vapor exposure to methylammonium thiocyanate at 100°C, and it retained this structure after 500 hours at 85°C. Solar cells fabricated with this material had a power conversion efficiency of more than 23%. After 500 hours under maximum power tracking and a period of dark recovery, 94% of the original efficiency was retained.Science , this issue p.eabb8985

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