Interfacial Residual Stress Relaxation in Perovskite Solar Cells with Improved Stability

被引：398

作者：

Wang, Hao ^{[1
]}

Zhu, Cheng ^{[1
]}

Liu, Lang ^{[1
]}

Ma, Sai ^{[1
]}

Liu, Pengfei ^{[1
]}

Wu, Jiafeng ^{[1
]}

Shi, Congbo ^{[1
]}

Du, Qin ^{[1
]}

Hao, Yanmin ^{[2
]}

Xiang, Sisi ^{[3
]}

Chen, Haining ^{[3
]}

Chen, Pengwan ^{[4
]}

Bai, Yang ^{[1
]}

Zhou, Huanping ^{[5
]}

Li, Yujing ^{[1
]}

Chen, Qi ^{[1
]}

机构：

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

[2] Tsinghua Univ, Sch Mat Sci & Engn, Ctr Testing & Analyzing Mat, Beijing 100084, Peoples R China

[3] Beihang Univ, Sch Mat Sci & Engn, 37 Xueyuan Rd, Beijing 100191, Peoples R China

[4] Beijing Inst Technol, State Key Lab Explos Sci & Technol, Beijing 100081, Peoples R China

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

来源：

ADVANCED MATERIALS | 2019年 / 31卷 / 48期

基金：

中国国家自然科学基金;

关键词：

bionics; depth resolved grazing incident X-ray diffraction; perovskite solar cells; HALIDE PEROVSKITES; HIGHLY EFFICIENT; DIMENSIONALITY; TRANSITION; CARTILAGE; BEHAVIOR; MODULUS; GIXRD;

D O I：

10.1002/adma.201904408

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

To improve the photovoltaic performance (both efficiency and stability) in hybrid organic-inorganic halide perovskite solar cells, perovskite lattice distortion is investigated with regards to residual stress (and strain) in the polycrystalline thin films. It is revealed that residual stress is concentrated at the surface of the as-prepared film, and an efficient method is further developed to release this interfacial stress by A site cation alloying. This results in lattice reconstruction at the surface of polycrystalline thin films, which in turn results in low elastic modulus. Thus, a "bone-joint" configuration is constructed within the interface between the absorber and the carrier transport layer, which improves device performance substantially. The resultant photovoltaic devices exhibit an efficiency of 21.48% with good humidity stability and improved resistance against thermal cycling.

引用

页数：10

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