Silver coordination-induced n-doping of PCBM for stable and efficient inverted perovskite solar cells

Abstract The bidirectional migration of halides and silver causes irreversible chemical corrosion to the electrodes and perovskite layer, affecting long-term operation stability of perovskite solar cells. Here we propose a silver coordination-induced n-doping of [6,6]-phenyl-C 61 -butyric acid methyl ester strategy to safeguard Ag electrode against corrosion and impede the migration of iodine within the PSCs. Meanwhile, the coordination between DCBP and silver induces n-doping in the PCBM layer, accelerating electron extraction from the perovskite layer. The resultant PSCs demonstrate an efficiency of 26.03% (certified 25.51%) with a minimal non-radiative voltage loss of 126 mV. The PCE of resulting devices…

• NN
  National Natural Science Foundation of China

  Awards: 62204028, 62204026, 11974063
• CU
  Chongqing University
• CP
  China Postdoctoral Science Foundation

  Awards: 2022M710507, 2022TQ0391
• NS
  Natural Science Foundation of Chongqing

  Awards: CSTB2022NSCQ, CSTB2022NSCQ-MSX1514
• CP
  Chongqing Postdoctoral Science Special Foundation
• CS
  Centre Scientifique et Technique du Bâtiment