Limiting phosphonic acid interlayer-perovskite reactivity to stabilize perovskite solar modules

• 成果类型: Article
• 署名作者: Fei, Chengbin; Zhang, Yadong; Wang, Mengru; Yang, Yuqian; Shi, Xiaoqiang; Wang, Shaojie; Guo, Huanxin; Guo, Chuanhang; Liu, He; Li, Mingze; Gu, Hangyu; Barlow, Stephen; You, Wei; Wang, Mengen; Marder, Seth R.; Huang, Jinsong
• 署名单位: University of North Carolina; University of North Carolina Chapel Hill; University of North Carolina School of Medicine; University of Colorado System; University of Colorado Boulder; University of North Carolina; University of North Carolina Chapel Hill; University of North Carolina School of Medicine; University of North Carolina; University of North Carolina Chapel Hill; University of North Carolina School of Medicine; University of Colorado System; University of Colorado Boulder; University of Colorado System; University of Colorado Boulder
• 刊物名称: SCIENCE
• ISSN/ISSBN: 0036-8075; 1095-9203
• DOI: 10.1126/science.adz7969
• 发表日期: 2026-01-01
• 页码: eadz7969
• 关键词: HOLE-TRANSPORT LAYERS; degradation; surface; cells

摘要

Phosphonic acid (PA)-based interlayers used in metal-halide perovskite solar cells (PSCs) can suffer from instability at elevated temperatures. We report that the acidic protons of PAs weakly bound to indium tin oxide (ITO) can accelerate the oxidation of iodide, decomposition of formamidinium, and reduction of lead ions and that these reactions accelerate at high temperature and on exposure to ultraviolet light. Also, some common PA molecules weakly bonded to ITO can desorb and react with perovskites. We synthesized a bis(diarylamino)biphenyl-based PA that binds more strongly to ITO and show that its use in PSCs led to an operational lifetime of nearly 3000 hours with 10% efficiency loss (T-90) at 85 degrees C under a metal halide lamp (including ultraviolet light) with maximum power point tracking. Minimodules had power conversion efficiencies >22% with an aperture area of >20 square centimeters and exhibited a T-90 lifetime of similar to 2200 hours under similar testing conditions.