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A Scalable Methylamine Gas Healing Strategy for High‐Efficiency Inorganic Perovskite Solar Cells
Author(s) -
Shao Zhipeng,
Wang Zaiwei,
Li Zhipeng,
Fan Yingping,
Meng Hongguang,
Liu Ranran,
Wang Yan,
Hagfeldt Anders,
Cui Guanglei,
Pang Shuping
Publication year - 2019
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201814024
Subject(s) - methylamine , perovskite (structure) , halide , gas phase , absorption (acoustics) , photovoltaic system , materials science , caesium , chemical engineering , molecule , scalability , phase (matter) , chemistry , inorganic chemistry , computer science , organic chemistry , composite material , ecology , database , engineering , biology
An easy and scalable methylamine (MA) gas healing method was realized for inorganic cesium‐based perovskite (CsPbX 3 ) layers by incorporating a certain amount of MAX (X=I or Br) initiators into the raw film. It was found that the excess MAX accelerated the absorption of the MA gas into the CsPbX 3 film and quickly turned it into a liquid intermediate phase. Through the healing process, a highly uniform and highly crystalline CsPbX 3 film with enhanced photovoltaic performance was obtained. Moreover, the chemical interactions between a series of halides and MA gas molecules were studied, and the results could offer guidance in further optimizations of the healing strategy.