Fabrication of Porous Lead Bromide Films by Introducing Indium Tribromide for Efficient Inorganic CsPbBr3 Perovskite Solar Cells

被引:7
|
作者
Meng, Xianwei [1 ]
Chi, Kailin [2 ]
Li, Qian [3 ,4 ]
Feng, Bingtao [1 ]
Wang, Haodi [5 ]
Gao, Tianjiao [5 ]
Zhou, Pengyu [2 ]
Yang, Haibin [1 ]
Fu, Wuyou [1 ]
机构
[1] Jilin Univ, Coll Phys, State Key Lab Superhard Mat, Changchun 130012, Peoples R China
[2] Northeast Elect Power Univ, Sch Sci, Jilin 132012, Jilin, Peoples R China
[3] Chinese Acad Sci, Tech Inst Phys & Chem, Beijing Key Lab Cryobiomed Engn, Beijing 100190, Peoples R China
[4] Chinese Acad Sci, Tech Inst Phys & Chem, Key Lab Cryogen, Beijing 100190, Peoples R China
[5] Jilin Univ, Coll Phys, Changchun 130012, Peoples R China
基金
中国国家自然科学基金;
关键词
CsPbBr3; perovskite solar cells; InBr3; PbBr2; incorporation;
D O I
10.3390/nano11051253
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
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.
引用
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页数:11
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