Stabilized Hole-Selective Layer for High-Performance Inverted p-i-n Perovskite Solar Cells

Zhen Li, Xianglang Sun, Xiaopeng Zheng, Bo Li, Danpeng Gao, Shoufeng Zhang, Xin Wu, Shuai Li, Jianqiu Gong, Joseph Luther, Zhong'an Li, Zonglong Zhu

Research output: Contribution to journalArticlepeer-review


P-i-n geometry perovskite solar cells (PSCs) offer simplified fabrication, greater amenability to charge extraction layers, and low-temperature processing over n-i-p counterparts. Self-assembled monolayers (SAMs) can enhance the performance of p-i-n PSCs but ultrathin SAMs can be thermally unstable. We report a thermally robust hole-selective layer comprised of nickel oxide (NiOx) nanoparticle film with a surface-anchored (4-(3,11-dimethoxy-7H-dibenzo[c,g]carbazol-7-yl)butyl)phosphonic acid (MeO-4PADBC) SAM that can improve and stabilize the NiOx/perovskite interface. The energetic alignment and favorable contact and binding between NiOx/MeO-4PADBC and perovskite reduced the voltage deficit of PSCs with various perovskite compositions and led to strong interface toughening effects under thermal stress. The resulting 1.53-electron-volt devices achieved 25.6% certified power conversion efficiency and maintained >90% of their initial efficiency after continuously operating at 65 degrees Celsius for 1200 hours under 1-sun illumination.
Original languageAmerican English
Pages (from-to)284-289
Number of pages6
Issue number6668
StatePublished - 2023

NREL Publication Number

  • NREL/JA-5F00-86170


  • inverted perovskite solar cells
  • p-i-n geometry
  • phosphonic acid
  • self-assembled monolayers


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