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p ‐Type Charge Transfer Doping of Graphene Oxide with (NiCo) 1− y Fe y O x for Air‐Stable, All‐Inorganic CsPbIBr 2 Perovskite Solar Cells
Author(s) -
Du Jian,
Duan Jialong,
Yang Xiya,
Duan Yanyan,
Zhou Quanzhu,
Tang Qunwei
Publication year - 2021
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.202016703
Subject(s) - graphene , oxide , doping , materials science , energy conversion efficiency , electrode , ion , nanotechnology , electron transfer , metal , analytical chemistry (journal) , chemical engineering , chemistry , optoelectronics , organic chemistry , chromatography , metallurgy , engineering
The precise regulation of interfacial charge distribution highly determines the power conversion efficiency of perovskite solar cells (PSCs). Herein, inorganic (NiCo) 1− y Fe y O x nanoparticle decorated graphene oxide (GO) is successfully demonstrated as a hole booster for all‐inorganic CsPbIBr 2 PSC free of precious metal electrode. Arising from the spontaneous electron transfer induced p ‐type doping of GO from edged oxygen‐containing functional groups to (NiCo) 1− y Fe y O x , the best all‐inorganic CsPbIBr 2 PSC achieves an efficiency of 10.95 % under one standard sun owing to the eliminated paradox between charge extraction and charge localization in GO surface. Furthermore, the champion device exhibits an excellent long‐term stability at 10 % relative humidity without encapsulation over 70 days because of the suppressed ions migration.