title: Solution-Processed Nb:SnO2Electron Transport Layer for Efficient Planar Perovskite Solar Cells.
abstract: Electron transport layer (ETL), facilitating charge carrier separation and electron extraction, is a key component in planar perovskite solar cells (PSCs). We developed an effective ETL using low-temperature solution-processed Nb-doped SnO2(Nb:SnO2). Compared to the pristine SnO2, the power conversion efficiency of PSCs based on Nb:SnO2ETL is raised to 17.57% from 15.13%. The splendid performance is attributed to the excellent optical and electronic properties of the Nb:SnO2material, such as smooth surface, high electron mobility, appropriate electrical conductivity, therefore making a better growth platform for a high quality perovskite absorber layer. Experimental analyses reveal that the Nb:SnO2ETL significantly enhances the electron extraction and effectively suppresses charge recombination, leading to improved solar cell performance.
authors.affiliation: Key Laboratory of Applied Surface and Colloid Chemistry, National Ministry of Education; Shaanxi Key Laboratory for Advanced Energy Devices; Shaanxi Engineering Lab for Advanced Energy Technology; School of Materials Science & Engineering, Shaanxi Normal University , Xi'an 710119, P. R. China.
authors.forename: Xiaodong
authors.initials: X
authors.lastname: Ren
authors.affiliation: Key Laboratory of Applied Surface and Colloid Chemistry, National Ministry of Education; Shaanxi Key Laboratory for Advanced Energy Devices; Shaanxi Engineering Lab for Advanced Energy Technology; School of Materials Science & Engineering, Shaanxi Normal University , Xi'an 710119, P. R. China.
authors.forename: Dong
authors.initials: D
authors.lastname: Yang
authors.affiliation: Key Laboratory of Applied Surface and Colloid Chemistry, National Ministry of Education; Shaanxi Key Laboratory for Advanced Energy Devices; Shaanxi Engineering Lab for Advanced Energy Technology; School of Materials Science & Engineering, Shaanxi Normal University , Xi'an 710119, P. R. China.
authors.forename: Zhou
authors.initials: Z
authors.lastname: Yang
authors.affiliation: Key Laboratory of Applied Surface and Colloid Chemistry, National Ministry of Education; Shaanxi Key Laboratory for Advanced Energy Devices; Shaanxi Engineering Lab for Advanced Energy Technology; School of Materials Science & Engineering, Shaanxi Normal University , Xi'an 710119, P. R. China.
authors.forename: Jiangshan
authors.initials: J
authors.lastname: Feng
authors.affiliation: Key Laboratory of Applied Surface and Colloid Chemistry, National Ministry of Education; Shaanxi Key Laboratory for Advanced Energy Devices; Shaanxi Engineering Lab for Advanced Energy Technology; School of Materials Science & Engineering, Shaanxi Normal University , Xi'an 710119, P. R. China.
authors.forename: Xuejie
authors.initials: X
authors.lastname: Zhu
authors.affiliation: Key Laboratory of Applied Surface and Colloid Chemistry, National Ministry of Education; Shaanxi Key Laboratory for Advanced Energy Devices; Shaanxi Engineering Lab for Advanced Energy Technology; School of Materials Science & Engineering, Shaanxi Normal University , Xi'an 710119, P. R. China.
authors.forename: Jinzhi
authors.initials: J
authors.lastname: Niu
authors.affiliation: Key Laboratory of Applied Surface and Colloid Chemistry, National Ministry of Education; Shaanxi Key Laboratory for Advanced Energy Devices; Shaanxi Engineering Lab for Advanced Energy Technology; School of Materials Science & Engineering, Shaanxi Normal University , Xi'an 710119, P. R. China.
authors.forename: Yucheng
authors.initials: Y
authors.lastname: Liu
authors.affiliation: Key Laboratory of Applied Surface and Colloid Chemistry, National Ministry of Education; Shaanxi Key Laboratory for Advanced Energy Devices; Shaanxi Engineering Lab for Advanced Energy Technology; School of Materials Science & Engineering, Shaanxi Normal University , Xi'an 710119, P. R. China.
authors.forename: Wangen
authors.initials: W
authors.lastname: Zhao
authors.affiliation: Key Laboratory of Applied Surface and Colloid Chemistry, National Ministry of Education; Shaanxi Key Laboratory for Advanced Energy Devices; Shaanxi Engineering Lab for Advanced Energy Technology; School of Materials Science & Engineering, Shaanxi Normal University , Xi'an 710119, P. R. China.|Dalian Institute of Chemical Physics, Dalian National Laboratory for Clean Energy, Chinese Academy of Sciences , Dalian 116023, P. R. China.
authors.forename: Shengzhong Frank
authors.identifier: http://orcid.org/0000-0002-6338-852X
authors.initials: SF
authors.lastname: Liu
keywords: Nb:SnO2; low temperature; perovskite; solar cells; solution processing