Fabrication of Porous Lead Bromide Films by Introducing Indium Tribromide for Efficient Inorganic CsPbBr<sub>3</sub> Perovskite Solar Cells
Xianwei Meng,
Kailin Chi,
Qian Li,
Bingtao Feng,
Haodi Wang,
Tianjiao Gao,
Pengyu Zhou,
Haibin Yang,
Wuyou Fu
Affiliations
Xianwei Meng
State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
Kailin Chi
School of Science, Northeast Electric Power University, Jilin 132012, China
Qian Li
Beijing Key Lab of Cryo-Biomedical Engineering and Key Lab of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
Bingtao Feng
State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
Haodi Wang
College of Physics, Jilin University, Changchun 130012, China
Tianjiao Gao
College of Physics, Jilin University, Changchun 130012, China
Pengyu Zhou
School of Science, Northeast Electric Power University, Jilin 132012, China
Haibin Yang
State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
Wuyou Fu
State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
In the process of preparing CsPbBr3 films by two-step or multi-step methods, due to the low solubility of CsBr in organic solvents, the prepared perovskite films often have a large number of holes, which is definitely not conducive to the performance of CsPbBr3 perovskite solar cells (PSCs). In response to this problem, this article proposed a method of introducing InBr3 into the PbBr2 precursor to prepare a porous PbBr2 film to increase the reaction efficiency between CsBr and PbBr2 and achieve the purpose of In (Ⅲ) incorporation, which not only optimized the morphology of the produced CsPbBr3 film but also enhanced the charge extraction and transport capabilities, which was ascribed to the reduction of the trap state density and impurity phases in the perovskite films, improving the performance of CsPbBr3 PSCs. At the optimal InBr3 concentration of 0.21 M, the InBr3:CsPbBr3 perovskite solar cell exhibited a power conversion efficiency of 6.48%, which was significantly higher than that of the pristine device.
