Unusual defect physics in CH3NH3PbI3 perovskite solar cell absorber

被引：2338

作者：

Yin, Wan-Jian ^{[1
]}

Shi, Tingting

Yan, Yanfa

机构：

[1] Univ Toledo, Dept Phys & Astron, Toledo, OH 43606 USA

来源：

APPLIED PHYSICS LETTERS | 2014年 / 104卷 / 06期

关键词：

ORGANOMETAL HALIDE PEROVSKITES; EFFICIENT; PERFORMANCE; DEPOSITION; TRANSPORT; LENGTHS;

D O I：

10.1063/1.4864778

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Thin-film solar cells based on Methylammonium triiodideplumbate (CH3NH3PbI3) halide perovskites have recently shown remarkable performance. First-principle calculations show that CH3NH3PbI3 has unusual defect physics: (i) Different from common p-type thin-film solar cell absorbers, it exhibits flexible conductivity from good p-type, intrinsic to good n-type depending on the growth conditions; (ii) Dominant intrinsic defects create only shallow levels, which partially explain the long electron-hole diffusion length and high open-circuit voltage in solar cell. The unusual defect properties can be attributed to the strong Pb lone-pair s orbital and I p orbital antibonding coupling and the high ionicity of CH3NH3PbI3. (C) 2014 AIP Publishing LLC.

引用

页数：4

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