Residual Strain Evolution in Perovskite Solar Cells throughout Fabrication to Operation: Mechanisms, Characterization, and Regulation

Perovskite solar cells (PSCs) have achieved a power conversion efficiency (PCE) of over 27%, but further improvements of both PCEs and stability are needed for commercialization. One of the key factors hindering their development is the unpredictable residual strain in perovskites. The unstable octahedral structure of the perovskite cage leads to easy changes in bond lengths, bond angles, and crystal structure. It in turn generates, accumulates, and causes the non-uniform distribution of residual strain, ultimately affecting device performance. Therefore, given the versatility and precise tunability, residual strain engineering provides an effective pathway to optimize the performance of PSCs. This review…

• NN
  National Natural Science Foundation of China

  Award: 52461160298
• CN
  China National Petroleum Corporation

  Award: 2024ZG50
• SU
  Sichuan University

  Award: 2020SCUNG102
• NS
  Natural Science Foundation of Sichuan Province

  Award: 2024NSFSC1011
• FR
  Fundamental Research Funds for the Central Universities

  Award: YJ2021157