Impeded degradation of perovskite solar cells via the dual interfacial modification of siloxane

作     者：Xiao Zhang Changsu Cao Yang Bai Cheng Zhu Huachao Zai Sai Ma Yihua Chen Zhenhua Cui Congbo Shi Chenyue Wang Chenxiao Zhou Guizhou Yuan Ziyan Gao Jiawang Hong Jie Dou Hao Wang Huanping Zhou Hai Xiao Jun Li Qi Chen 

作者机构：Beijing Key Laboratory of Nanophotonics and Ultrafine Optoelectronic SystemsSchool of Materials Science and EngineeringBeijing Institute of TechnologyBeijing100081China Experimental Center of Advanced MaterialsSchool of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081China Department of Chemistry and Key Laboratory of Organic Optoelectronics and Molecular Engineering of Ministry of EducationTsinghua UniversityBeijing 100084China Department of ChemistrySouthern University of Science and TechnologyShenzhen 518055China Department of Materials Science and EngineeringCollege of EngineeringPeking UniversityBeijing 100871China Shanghai Synchrotron Radiation Facility(SSRF)Zhangjiang LabShanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201204China School of Aerospace EngineeringBeijing Institute of TechnologyBeijing 100081China 

出 版 物：《Science China Chemistry》 (中国科学（化学英文版）)

年 卷 期：2022年第65卷第11期

页      面：2299-2306页

核心收录：

学科分类：08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0703[理学-化学] 

基　　金：financially supported by the National Natural Science Foundation of China (21975028, 52172182, 22011540377) the Beijing Municipal Natural Science Foundation (JQ19008) 。 

主　　题：perovskite solar cells stability degradation kinetics 

摘      要：It is challenging to improve the long-term stability of perovskite solar cells(PSCs) without sacrificing efficiency. The perovskite absorbers degrade from the film surface/interfaces, which follows entangled mechanisms that have not been fully revealed yet.Herein, we decouple and elaborate two distinctive pathways regarding film degradation based on FACsPbI3perovskites.Moreover, a dual interfacial modification strategy has been developed for improving the material’s intrinsic stability, thus leading to the film degrading in a more retardant pathway. The corresponding PSCs achieve a stable power output efficiency of 23.75%.More importantly, the unencapsulated PSCs devices retain over 93% of their initial PCE after the maximum power point(MPP)tracking under the continuous 1-sun illumination and show significantly improved stability after aged under the thermal treatment or stored in ambient atmosphere for over 1500 hours without obvious PCE decay. This work shows the importance of modulating the degradation pathway on stability improvement, and at the same time, proposes a strategy for designing perovskite-based optoelectronics with excellent performance and stability.