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Cesium‐Containing Perovskite Solar Cell Based on Graphene/TiO 2 Electron Transport Layer
Author(s) -
Yang Pan,
Hu Zijun,
Zhao Xiaochong,
Chen Da,
Lin Hong,
Lai Xinchun,
Yang Lijun
Publication year - 2017
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201701479
Subject(s) - graphene , materials science , perovskite (structure) , perovskite solar cell , electron mobility , electron transport chain , layer (electronics) , electron , photoluminescence , caesium , nanotechnology , optoelectronics , chemical engineering , inorganic chemistry , chemistry , physics , quantum mechanics , engineering , biochemistry
Graphene shows remarkably high mobility, electronic and thermal conductivity, which have been widely incorporated in solar cells as electron transport highway. Herein, graphene is incorporated in TiO 2 compact layer as electron transport layer for cesium‐containing perovskite (Cs 0.1 (CH 3 NH 3 ) 0.9 PbI 3 ) solar cell. Introducing graphene effectively improves mobility of electron transport layer and reduce the quenching of perovskite photoluminescence, which is correlated with improved electron transport and extraction property. A significant improvement of power conversion efficiency from 11.2% to 15.4% is achieved (37% enhancement) through simply introducing graphene in TiO 2 compact layer. The improved efficiency is mainly due to the improved fill factor. This work highlights the roles of graphene in facilitating electron transport and extraction at interface of perovskite and electron transport layer.