Rational design of Lewis base molecules for stable and efficient inverted perovskite solar cells
成果类型：
Article
署名作者：
Li, Chongwen; Wang, Xiaoming; Bi, Enbing; Jiang, Fangyuan; Park, So Min; Li, You; Chen, Lei; Wang, Zaiwei; Zeng, Lewei; Chen, Hao; Liu, Yanjiang; Grice, Corey R.; Abudulimu, Abasi; Chung, Jaehoon; Xian, Yeming; Zhu, Tao; Lai, Huagui; Chen, Bin; Ellingson, Randy J.; Fu, Fan; Ginger, David S.; Song, Zhaoning; Sargent, Edward H.; Yan, Yanfa
署名单位：
University System of Ohio; University of Toledo; University System of Ohio; University of Toledo; University of Washington; University of Washington Seattle; University of Toronto; University System of Ohio; University of Toledo; Swiss Federal Institutes of Technology Domain; Swiss Federal Laboratories for Materials Science & Technology (EMPA); Northwestern University; Northwestern University
刊物名称：
SCIENCE
ISSN/ISSBN：
0036-9293
DOI：
10.1126/science.ade3970
发表日期：
2023-02-17
页码：
690-694
关键词：
total-energy calculations
long-term stability
ion migration
IMPACT
degradation
light
photoluminescence
performance
interfaces
operation
摘要：
Lewis base molecules that bind undercoordinated lead atoms at interfaces and grain boundaries (GBs) are known to enhance the durability of metal halide perovskite solar cells (PSCs). Using density functional theory calculations, we found that phosphine-containing molecules have the strongest binding energy among members of a library of Lewis base molecules studied herein. Experimentally, we found that the best inverted PSC treated with 1,3-bis(diphenylphosphino)propane (DPPP), a diphosphine Lewis base that passivates, binds, and bridges interfaces and GBs, retained a power conversion efficiency (PCE) slightly higher than its initial PCE of similar to 23% after continuous operation under simulated AM1.5 illumination at the maximum power point and at similar to 40 degrees C for >3500 hours. DPPP-treated devices showed a similar increase in PCE after being kept under open-circuit conditions at 85 degrees C for >1500 hours.