Electrochemically induced iodine migration in mixed halide perovskites: suppression through chloride insertion

被引：10
作者：
Cho, Junsang [1 ]
DuBose, Jeffrey T. [1 ,2 ]
Mathew, Preethi S. [1 ,2 ]
Kamat, Prashant V. [1 ,2 ,3 ]
机构：
[1] Univ Notre Dame, Radiat Lab, Notre Dame, IN 46556 USA
[2] Univ Notre Dame, Dept Chem & Biochem, Notre Dame, IN 46556 USA
[3] Univ Notre Dame, Dept Chem & Biomol Engn, Notre Dame, IN 46556 USA
来源：
CHEMICAL COMMUNICATIONS | 2021年 / 57卷 / 02期
关键词：
PHASE SEGREGATION; TRANSPORT; IMPROVE;
D O I：
10.1039/d0cc06217k
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The role of chloride in improving the stability of mixed halide perovskites (MAPbCl(x)Br(0.5(1-x))I(0.5(1-x)))(3) is probed using spectroelectrochemistry. The injection of holes into mixed halide perovskite films through applied anodic bias results in the selective migration of iodine with ultimate expulsion into the electrolyte. Increasing the Cl content (x = 0 to 0.1) in the mixed halide perovskite suppresses the iodine mobility and thus decreases the rate of its expulsion into the solution. Implications of iodine mobility induced by hole accumulation and its impact on overall stability is discussed.
引用
收藏
页码：235 / 238
页数：4
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