Grain-Boundary "Patches" by In Situ Conversion to Enhance Perovskite Solar Cells Stability

被引：267

作者：

Liu, Lang ^{[1
]}

Huang, Sheng ^{[1
]}

Lu, Yue ^{[2
]}

Liu, Pengfei ^{[1
]}

Zhao, Yizhou ^{[1
]}

Shi, Congbo ^{[1
]}

Zhang, Siyu ^{[1
]}

Wu, Jiafeng ^{[1
]}

Zhong, Haizheng ^{[1
]}

Sui, Manling ^{[2
]}

Zhou, Huanping ^{[3
]}

Jin, Haibo ^{[1
]}

Li, Yujing ^{[1
]}

Chen, Qi ^{[1
,4
]}

机构：

[1] Beijing Inst Technol, Beijing Key Lab Nanophoton & Ultrafine Optoelect, Sch Mat Sci & Engn, Beijing 100081, Peoples R China

[2] Beijing Univ Technol, Inst Microstruct & Properties Adv Mat, Beijing 100124, Peoples R China

[3] Peking Univ, Dept Mat Sci & Engn, Coll Engn, Beijing 100871, Peoples R China

[4] Beijing Inst Technol, Adv Res Inst Multidisciplinary Sci, Beijing 100081, Peoples R China

来源：

ADVANCED MATERIALS | 2018年 / 30卷 / 29期

基金：

中国国家自然科学基金;

关键词：

grain-boundary engineering; methimazole; patch; perovskite solar cells; stability; ORGANOMETAL TRIHALIDE PEROVSKITE; HIGHLY EFFICIENT; LEAD IODIDE; PERFORMANCE; DEGRADATION; MIGRATION; PASSIVATION; HYSTERESIS; LIGHT; GOLD;

D O I：

10.1002/adma.201800544

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The power conversion efficiency of organic-inorganic hybrid perovskite solar cells has increased rapidly, but the device stability remains a big challenge. Previous studies show the grain boundary (GB) can facilitate ion migration and initiate device degradation. Herein, methimazole (MMI) is employed for the first time to construct a surface patch by in situ converting residual PbI2 at GBs. The resultant MMI-PbI2 complex can effectively suppress ion migration and inhibit diffusion of the metal electrodes. The origin of the surface patch effect and their working mechanisms are investigated experimentally and theoretically at the microscopic level. It hence demonstrates a simple and effective method to prolong the device stability in the context of GB engineering, which could be extensively applied to perovskite-based optoelectronics.

引用

页数：8

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