title: Modulated CH3NH3PbI3-xBrxfilm for efficient perovskite solar cells exceeding 18.
abstract: The organic-inorganic lead halide perovskite layer is a crucial factor for the high performance perovskite solar cell (PSC). We introduce CH3NH3Br in the precursor solution to prepare CH3NH3PbI3-xBrxhybrid perovskite, and an uniform perovskite layer with improved crystallinity and apparent grain contour is obtained, resulting in the significant improvement of photovoltaic performance of PSCs. The effects of CH3NH3Br on the perovskite morphology, crystallinity, absorption property, charge carrier dynamics and device characteristics are discussed, and the improvement of open circuit voltage of the device depended on Br doping is confirmed. Based on above, the device based on CH3NH3PbI2.86Br0.14exhibits a champion power conversion efficiency (PCE) of 18.02%. This study represents an efficient method for high-performance perovskite solar cell by modulating CH3NH3PbI3-xBrxfilm.
authors.affiliation: Engineering Research Center of Environment-Friendly Functional Materials for Ministry of Education, Institute of Materials Physical Chemistry, College of Material Science and Engineering, Huaqiao University, Xiamen 361021, China.
authors.forename: Yongguang
authors.initials: Y
authors.lastname: Tu
authors.affiliation: Engineering Research Center of Environment-Friendly Functional Materials for Ministry of Education, Institute of Materials Physical Chemistry, College of Material Science and Engineering, Huaqiao University, Xiamen 361021, China.
authors.forename: Jihuai
authors.initials: J
authors.lastname: Wu
authors.affiliation: Engineering Research Center of Environment-Friendly Functional Materials for Ministry of Education, Institute of Materials Physical Chemistry, College of Material Science and Engineering, Huaqiao University, Xiamen 361021, China.
authors.forename: Zhang
authors.initials: Z
authors.lastname: Lan
authors.affiliation: Engineering Research Center of Environment-Friendly Functional Materials for Ministry of Education, Institute of Materials Physical Chemistry, College of Material Science and Engineering, Huaqiao University, Xiamen 361021, China.
authors.forename: Xin
authors.initials: X
authors.lastname: He
authors.affiliation: Engineering Research Center of Environment-Friendly Functional Materials for Ministry of Education, Institute of Materials Physical Chemistry, College of Material Science and Engineering, Huaqiao University, Xiamen 361021, China.
authors.forename: Jia
authors.initials: J
authors.lastname: Dong
authors.affiliation: Engineering Research Center of Environment-Friendly Functional Materials for Ministry of Education, Institute of Materials Physical Chemistry, College of Material Science and Engineering, Huaqiao University, Xiamen 361021, China.
authors.forename: Jinbiao
authors.initials: J
authors.lastname: Jia
authors.affiliation: Engineering Research Center of Environment-Friendly Functional Materials for Ministry of Education, Institute of Materials Physical Chemistry, College of Material Science and Engineering, Huaqiao University, Xiamen 361021, China.
authors.forename: Panfeng
authors.initials: P
authors.lastname: Guo
authors.affiliation: Engineering Research Center of Environment-Friendly Functional Materials for Ministry of Education, Institute of Materials Physical Chemistry, College of Material Science and Engineering, Huaqiao University, Xiamen 361021, China.
authors.forename: Jianming
authors.initials: J
authors.lastname: Lin
authors.affiliation: Engineering Research Center of Environment-Friendly Functional Materials for Ministry of Education, Institute of Materials Physical Chemistry, College of Material Science and Engineering, Huaqiao University, Xiamen 361021, China.
authors.forename: Miaoliang
authors.initials: M
authors.lastname: Huang
authors.affiliation: Engineering Research Center of Environment-Friendly Functional Materials for Ministry of Education, Institute of Materials Physical Chemistry, College of Material Science and Engineering, Huaqiao University, Xiamen 361021, China.
authors.forename: Yunfang
authors.initials: Y
authors.lastname: Huang