Micro-strain regulation strategy to stabilize perovskite lattice based on the categories and impact of strain on perovskite solar cells  

作　　者：Caixia Li Wenwu Liu Shiji Da Lingbin Kong Fen Ran 

机构地区：[1]State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals,Lanzhou University of Technology,Lanzhou 730050,Gansu,China [2]School of Materials Science and Engineering,Lanzhou University of Technology,Lanzhou 730050,Gansu,China

出　　处：《Journal of Energy Chemistry》2025年第1期578-604,共27页能源化学(英文版)

基　　金：Project of National Natural Science Foundation (52262035);Key Research Program of Education Department of Gansu Province (GSSYLXM-03);Hong Liu excellent youth project of Lanzhou University of technology;Major Science and Technology Project of Gansu Province(22ZD6GA008);Jin chang Technology Program(2022GY003)。

摘　　要：Photovoltaic metal halide perovskite solar cells(PSCs) convert light to electricity more efficiently than crystalline silicon cells, and the cost of materials used to make them is lower than that of silicon cells.Conversion efficiency is not a core issue affecting the application of perovskite solar cells in special scenarios.At present, stability is the major technical encounters that hinders its further commercial development. Microstrain in PSCs is currently a significant factor responsible for the device's instability. Strain-induced ion migration is widely believed to accelerate perovskite degradation even when external stimuli are excluded.Undoubtedly, it is imperative to study strain to enhance the stability of PSCs. This paper reviews recent developments to understand strain's origin and effect mechanisms on performance of PSCs, including ion migration,failure behavior, defect formation, and its effect on photoelectric properties, stability, and reliability.Additionally, several well-known strain management strategies are systematically introduced based on the strain effect mechanism and strain engineering on the film, providing more clues for further preparation with increased stability. The manipulation of external physical strain applied from films to entire devices has been extensively studied. Furthermore, recommendations for future research directions and chemical approaches have been provided. It is emphasized that strain engineering plays a crucial role in improving the efficiency and longevity of PSCs. Tensile strain causes rapid degradation, while moderate compressive strain and external strain control could improve properties and stability. Efforts should focus on controlling compressive strain to mitigate residual tensile strain and introducing it in a controlled manner. Future research endeavors may focus on exploring these pathways to improve the efficiency and lifespan of PSCs.

关 键 词：Halide perovskite solar cells Strain origins Strain effects Strain management 

分 类 号：TG1[金属学及工艺—金属学]