25% - Efficiency flexible perovskite solar cells via controllable growth of SnO 2

High power conversion efficiency (PCE) flexible perovskite solar cells (FPSCs) are highly desired power sources for aerospace crafts and flexible electronics. However, their PCEs still lag far behind their rigid counterparts. Herein, we report a high PCE FPSC by controllable growth of a SnO 2 electron transport layer through constant pH chemical bath deposition (CBD). The application of SnSO 4 as tin source enables us to perform CBD without strong acid, which in turn makes it applicable to acid-sensitive flexible indium tin oxide. Furthermore, a mild and controllable growth environment leads to uniform particle growth and dense SnO 2 deposition with full coverage and reproducibility, resulting in a record PCE…

• NN
  National Natural Science Foundation of China

  Awards: U23A20138, SKLD20M03, SKLD21Z03, U23B20153,U23A20138, U23B20153
• CP
  China Postdoctoral Science Foundation

  Award: 2023M741888
• TU
  Tsinghua University

  Award: 20221080065
• RP
  Recruitment Program of Global Experts
• SG
  State Grid Corporation of China
• NK
  National Key Research and Development Program of China

  Award: 2022YFB3803304