Strain regulation retards natural operation decay of perovskite solar cells

Abstract Perovskite solar cells (pero-SCs) have undergone rapid development in the past decade. However, there is still a lack of systematic studies investigating whether the empirical rules of working lifetime assessment used for silicon solar cells can be applied to pero-SCs. It is believed that pero-SCs show enhanced stability under day/night cycling owing to the reported self-healing effect in the dark 1,2 . Here we find that the degradation of highly efficient FAPbI 3 pero-SCs is much faster under a natural day/night cycling mode, bringing into question the widely accepted approach to estimate the operational lifetime of pero-SCs based on continuous-mode testing. We reveal the key factor to be the lattice…

• SS
  Salt Science Research Foundation
• NN
  National Natural Science Foundation of China

  Awards: 12104467, 52103227, 52325307, 52273188, 2020YFB1506400, 22075194
• GO
  Government of Jiangsu Province
• LU
  Linköpings Universitet

  Award: 2009-00971
• E
  Energimyndigheten
• SU
  Soochow University
• PA
  Priority Academic Program Development of Jiangsu Higher Education Institutions

  Award: 111 Project
• CI
  Collaborative Innovation Center of Suzhou Nano Science and Technology
• HE
  Higher Education Discipline Innovation Project
• NK
  National Key Research and Development Program of China

  Award: 2020YFB1506400
• OO
  Office of Naval Research

  Awards: N00014-20-1-2573, N00014