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Graphdiyne‐Based Bulk Heterojunction for Efficient and Moisture‐Stable Planar Perovskite Solar Cells
Author(s) -
Li Hongshi,
Zhang Rui,
Li Yusheng,
Li Yiming,
Liu Huibiao,
Shi Jiangjian,
Zhang Huiyin,
Wu Huijue,
Luo Yanhong,
Li Dongmei,
Li Yuliang,
Meng Qingbo
Publication year - 2018
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.201802012
Subject(s) - heterojunction , materials science , perovskite (structure) , passivation , exciton , optoelectronics , energy conversion efficiency , planar , grain boundary , work function , chemical engineering , nanotechnology , composite material , condensed matter physics , microstructure , layer (electronics) , computer science , physics , computer graphics (images) , engineering
Graphdiyne (GDY) is introduced into the FA 0.85 MA 0.15 Pb(I 0.85 Br 0.15 ) 3 perovskite film to construct a perovskite/graphdiyne (PVSK/GDY) bulk heterojunction for planar perovskite solar cells (PSCs). This PVSK/GDY bulk heterojunction is suggested to provide an extra channel to favor exciton separation and facilitate the photogenerated electron extraction ability. The electron transportation ability has been improved for higher J sc , and the introduction of GDY can passivate grain boundaries and interfaces to effectively suppress photogenerated carrier recombination, leading to relatively higher fill factor. Up to 20.54% power conversion efficiency is achieved. In addition, the ability of this perovskite film with PVSK/GDY bulk heterojunctions to function in humid conditions is also improved, leading to good stability of PSCs toward moisture. This work provides a new way to fabricate highly efficient, stable PSCs by constructing bulk heterojunctions simultaneously for accelerating the exciton separation and photogenerated electron transportation and improving the device stability.