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<p>Conventional passivating ligands bind to perovskite surfaces through only a single active site, which not only creates a resistive barrier due to dense ligand packing but also restricts the enhancement of device stability. Here, we identify an antimony chloride-N,N-dimethyl selenourea complex, Sb(SU)<sub>2</sub>Cl<sub>3</sub>, as a multi-anchoring ligand to significantly enhance perovskite crystallinity, suppress defect formation, and dramatically improve moisture resistance and overall stability. As a result, we achieve a power conversion efficiency of 25.03% in fully air-processed perovskite solar cells fabricated using a two-step method—among the highest efficiencies reported for devices prepared under ambient conditions. Remarkably, unencapsulated cells exhibited linear extrapolated <i>T</i><sub>80</sub> lifetimes of 23,325 h during dark shelf storage. Furthermore, these unencapsulated devices demonstrate exceptional thermal and operational stability, with <i>T</i><sub>80</sub> lifetimes of 5,004 (at 85 °C) and 5,209 hours (under 1-sun illumination), respectively, ranking them among the most stable perovskite solar cells to date.</p>

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Enhanced coordination interaction with multi-site binding ligands for efficient and stable perovskite solar cells

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年7月11日

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  • Riming Nie,
  • Peikun Zhang,
  • Jiaxing Gao,
  • Cheng Wang,
  • Weicun Chu,
  • Luyao Li,
  • Kaiyu Wang,
  • Dongmin Qian,
  • Fanrong Lin,
  • Xuefeng Xia,
  • Yong Wu,
  • Lingfeng Chao,
  • Chunyang Miao,
  • Xiaoming Zhao,
  • Wanlin Guo,
  • Zhuhua Zhang

摘要

Conventional passivating ligands bind to perovskite surfaces through only a single active site, which not only creates a resistive barrier due to dense ligand packing but also restricts the enhancement of device stability. Here, we identify an antimony chloride-N,N-dimethyl selenourea complex, Sb(SU)2Cl3, as a multi-anchoring ligand to significantly enhance perovskite crystallinity, suppress defect formation, and dramatically improve moisture resistance and overall stability. As a result, we achieve a power conversion efficiency of 25.03% in fully air-processed perovskite solar cells fabricated using a two-step method—among the highest efficiencies reported for devices prepared under ambient conditions. Remarkably, unencapsulated cells exhibited linear extrapolated T80 lifetimes of 23,325 h during dark shelf storage. Furthermore, these unencapsulated devices demonstrate exceptional thermal and operational stability, with T80 lifetimes of 5,004 (at 85 °C) and 5,209 hours (under 1-sun illumination), respectively, ranking them among the most stable perovskite solar cells to date.