离子
卤化物
钙钛矿(结构)
磁滞
材料科学
光电效应
化学物理
Crystal(编程语言)
光电子学
化学
无机化学
结晶学
凝聚态物理
物理
计算机科学
有机化学
程序设计语言
作者
Binbin Zhang,Fangbao Wang,Hongjian Zhang,Bao Xiao,Qihao Sun,Jun Guo,Ahmed Ben Hafsia,Aihui Shao,Yadong Xu,Jian Zhou
摘要
Ion migration in halide perovskite materials usually brings an intractable problem in the working stability of solar cells and photoelectrical detectors. The mechanism of ion migration and its impact on physical properties are still open questions. In this work, the ion migration behavior in solution-grown CsPbBr3 crystals was observed by the hysteresis in current–voltage curves and the temperature dependent reversed current–time measurements. Defect proliferation phenomena (new defects of [VCs]− and [PbBr]2+) originating from ion migration were verified by thermally stimulated current spectroscopy. Our results also give evidence that Cs+ ions also participate in the process of ion migration except the widely considered Br− ions. Furthermore, the photoelectric properties of the CsPbBr3 device were found to be seriously deteriorated after the ion migration. Our work demonstrates the strong correlation between the ion migration and physical properties in halide perovskites.
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