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Defect‐Engineering‐Enabled High‐Efficiency All‐Inorganic Perovskite Solar Cells
Author(s) -
Liang Jia,
Han Xiao,
Yang JiHui,
Zhang Boyu,
Fang Qiyi,
Zhang Jing,
Ai Qing,
Ogle Meredith M.,
Terlier Tanguy,
Martí Angel A.,
Lou Jun
Publication year - 2019
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201903448
Subject(s) - perovskite (structure) , glovebox , materials science , photovoltaic system , iodide , energy conversion efficiency , band gap , caesium , nanotechnology , open circuit voltage , chemical engineering , optoelectronics , voltage , inorganic chemistry , chemistry , organic chemistry , electrical engineering , engineering
Abstract The emergence of cesium lead iodide (CsPbI 3 ) perovskite solar cells (PSCs) has generated enormous interest in the photovoltaic research community. However, in general they exhibit low power conversion efficiencies (PCEs) because of the existence of defects. A new all‐inorganic perovskite material, CsPbI 3 :Br:InI 3 , is prepared by defect engineering of CsPbI 3 . This new perovskite retains the same bandgap as CsPbI 3 , while the intrinsic defect concentration is largely suppressed. Moreover, it can be prepared in an extremely high humidity atmosphere and thus a glovebox is not required. By completely eliminating the labile and expensive components in traditional PSCs, the all‐inorganic PSCs based on CsPbI 3 :Br:InI 3 and carbon electrode exhibit PCE and open‐circuit voltage as high as 12.04% and 1.20 V, respectively. More importantly, they demonstrate excellent stability in air for more than two months, while those based on CsPbI 3 can survive only a few days in air. The progress reported represents a major leap for all‐inorganic PSCs and paves the way for their further exploration in order to achieve higher performance.