Lead-chelating hole-transport layers for efficient and stable perovskite minimodules

• 成果类型: Article
• 署名作者: Fei, Chengbin; Li, Nengxu; Wang, Mengru; Wang, Xiaoming; Gu, Hangyu; Chen, Bo; Zhang, Zhao; Ni, Zhenyi; Jiao, Haoyang; Xu, Wenzhan; Shi, Zhifang; Yan, Yanfa; Huang, Jinsong
• 署名单位: University of North Carolina; University of North Carolina Chapel Hill; University of North Carolina School of Medicine; University System of Ohio; University of Toledo; University of North Carolina; University of North Carolina Chapel Hill; University of North Carolina School of Medicine
• 刊物名称: SCIENCE
• ISSN/ISSBN: 0036-8612
• DOI: 10.1126/science.ade9463
• 发表日期: 2023-05-26
• 页码: 823-829
• 关键词: solar-cells; bathocuproine; blocking; interfaces; contacts; films

摘要

The defective bottom interfaces of perovskites and hole-transport layers (HTLs) limit the performance of p-i-n structure perovskite solar cells. We report that the addition of lead chelation molecules into HTLs can strongly interact with lead(II) ion (Pb2+), resulting in a reduced amorphous region in perovskites near HTLs and a passivated perovskite bottom surface. The minimodule with an aperture area of 26.9 square centimeters has a power conversion efficiency (PCE) of 21.8% (stabilized at 21.1%) that is certified by the National Renewable Energy Laboratory (NREL), which corresponds to a minimal small-cell efficiency of 24.6% (stabilized 24.1%) throughout the module area. Small-area cells and large-area minimodules with lead chelation molecules in HTLs had a light soaking stability of 3010 and 2130 hours, respectively, at an efficiency loss of 10% from the initial value under 1-sun illumination and open-circuit voltage conditions.