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Amidination of ligands for chemical and field-effect passivation stabilizes perovskite solar cells

  • Yi Yang
  • , Hao Chen
  • , Cheng Liu
  • , Jian Xu
  • , Chuying Huang
  • , Christos D. Malliakas
  • , Haoyue Wan
  • , Abdulaziz S.R. Bati
  • , Zaiwei Wang
  • , Robert P. Reynolds
  • , Isaiah W. Gilley
  • , Shuta Kitade
  • , Taylor E. Wiggins
  • , Stefan Zeiske
  • , Selengesuren Suragtkhuu
  • , Munkhbayar Batmunkh
  • , Lin X. Chen
  • , Bin Chen*
  • , Mercouri G. Kanatzidis*
  • , Edward H. Sargent*
  • *此作品的通讯作者
  • Northwestern University
  • University of Toronto
  • Griffith University Queensland
  • Argonne National Laboratory

科研成果: 期刊稿件文章同行评审

摘要

Surface passivation has driven the rapid increase in the power conversion efficiency (PCE) of perovskite solar cells (PSCs). However, state-of-the-art surface passivation techniques rely on ammonium ligands that suffer deprotonation under light and thermal stress. We developed a library of amidinium ligands, of interest for their resonance effect–enhanced N–H bonds that may resist deprotonation, to increase the thermal stability of passivation layers on perovskite surfaces. This strategy resulted in a >10-fold reduction in the ligand deprotonation equilibrium constant and a twofold increase in the maintenance of photoluminescence quantum yield after aging at 85°C under illumination in air. Implementing this approach, we achieved a certified quasi–steady-state PCE of 26.3% for inverted PSCs; and we report retention of ≥90% PCE after 1100 hours of continuous 1-sun maximum power point operation at 85°C.

源语言英语
页(从-至)898-902
页数5
期刊Science
386
6724
DOI
出版状态已出版 - 22 11月 2024
已对外发布

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