Multiple-Trapping Model for the Charge Recombination Dynamics in Mesoporous-Structured Perovskite Solar Cells

被引:11
作者
Wang, Hao-Yi [1 ]
Wang, Yi [2 ]
Hao, Ming-Yang [1 ]
Qin, Yujun [1 ]
Fu, Li-Min [1 ]
Guo, Zhi-Xin [1 ]
Ai, Xi-Cheng [1 ]
Zhang, Jian-Ping [1 ]
机构
[1] Renmin Univ China, Dept Chem, Beijing 100872, Peoples R China
[2] Natl Univ Singapore, Dept Chem, Singapore 119077, Singapore
基金
中国国家自然科学基金;
关键词
charge recombination; dynamics; mesoporous structure; perovskite; solar cells; ORGANOMETAL HALIDE PEROVSKITE; NANOSTRUCTURED SEMICONDUCTOR ELECTRODES; SINGLE-CRYSTALS; DIFFUSION-COEFFICIENT; CARRIER MOBILITY; RATE CONSTANTS; MU-S; PERFORMANCE; LIFETIMES; STATES;
D O I
10.1002/cssc.201701780
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The photovoltaic performance of organic-inorganic hybrid perovskite solar cells has reached a bottleneck after rapid development in last few years. Further breakthrough in this field requires deeper understanding of the underlying mechanism of the photoelectric conversion process in the device, especially the dynamics of charge-carrier recombination. Originating from dye-sensitized solar cells (DSSCs), mesoporous-structured perovskite solar cells (MPSCs) have shown many similarities to DSSCs with respect to their photoelectric dynamics. Herein, by applying the multiple-trapping model of the charge-recombination dynamic process for DSSCs in MPSCs, with rational modification, a novel physical model is proposed to describe the dynamics of charge recombination in MPSCs that exhibits good agreement with experimental data. Accordingly, the perovskite- and TiO2-dominating charge-recombination processes are assigned and their relationships with the trap-state distribution are also discussed. An optimal balance between these two dynamic processes is required to improve the performance of mesoporous-structured perovskite devices.
引用
收藏
页码:4872 / 4878
页数:7
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