2021 Nat. Mater. (IF 43.84) : Toward Higher Efficiency Perovskite Photovoltaics Strain Analysis and Engineering

　　Nature Materials (IF 43.84) recently published the results of strain analysis of halide perovskite solar devices jointly researched by the University of Cambridge, the University of Surrey, and the University of Toronto in Canada.

　　Current evidence indicates that strain analysis in halide perovskite devices is a key factor in determining device efficiency and stability. The author thoroughly studied the stress and strain of perovskite device performance and found that it is very important to suppress non-radiative recombination under low carrier flux. Stress detection and analysis should be given full attention. For example, film wrinkles, migration defects, mechanical fractures, etc. are directly related to stress. In addition, the strain adjustment at the interface can further improve the growth, phase stability and integrity of the perovskite. Scientists should pay more attention to the local detection of strain to ensure the accuracy and breadth of the strain detection.

　　The author believes that a broad understanding of the strain in halide perovskites will further improve the efficiency and stability of perovskite solar devices, which is of great significance to the large-scale and commercialization of perovskite solar devices.