图层(电子)
热稳定性
钙钛矿(结构)
氧化物
热分解
材料科学
聚合物
弹性模量
化学工程
复合材料
化学
工程类
有机化学
冶金
作者
Weitao Yang,Danming Zhong,Minmin Shi,Shaoxing Qu,Hongzheng Chen
出处
期刊:iScience
[Elsevier]
日期:2019-12-01
卷期号:22: 534-543
被引量:38
标识
DOI:10.1016/j.isci.2019.11.007
摘要
Heat is crucial to the long-term stability of perovskite solar cells (PVSCs). Herein, thermal stability of PVSCs based on metal oxide (MO) and polymer (P) was investigated. Firstly, chemical decomposition behavior of perovskite films was characterized and analyzed, revealing that chemically active MO would accelerate the decomposition of methylamine lead iodide (MAPbI3). Secondly, thermal-induced stress, resulting from the mismatched thermal expansion coefficients of different layers of PVSCs, and its effect on the mechanical stability of perovskite films were studied. Combining experiment and simulation, we conclude that “soft” (low modulus) and thick (>20 nm) interfacial layers offer better relaxation of thermal-induced stress. As a result, PVSCs employing thick polymer interfacial layer offer a remarkably improved thermal stability. This work offers not only the degradation insight of perovskite films on different substrates but also the path toward highly thermal stable PVSCs by rational design of interfacial layers.
科研通智能强力驱动
Strongly Powered by AbleSci AI