Engineering ligand reactivity enables high-temperature operation of stable perovskite solar cells

• 成果类型: Article
• 署名作者: Park, So Min; Wei, Mingyang; Xu, Jian; Atapattu, Harindi R.; Eickemeyer, Felix T.; Darabi, Kasra; Grater, Luke; Yang, Yi; Liu, Cheng; Teale, Sam; Chen, Bin; Chen, Hao; Wang, Tonghui; Zeng, Lewei; Maxwell, Aidan; Wang, Zaiwei; Rao, Keerthan R.; Cai, Zhuoyun; Zakeeruddin, Shaik M.; Pham, Jonathan T.; Risko, Chad M.; Amassian, Aram; Kanatzidis, Mercouri G.; Graham, Kenneth R.; Gratzel, Michael; Sargent, Edward H.
• 署名单位: University of Toronto; Swiss Federal Institutes of Technology Domain; Ecole Polytechnique Federale de Lausanne; University of Kentucky; North Carolina State University; North Carolina State University; Northwestern University; University of Kentucky; Northwestern University
• 刊物名称: SCIENCE
• ISSN/ISSBN: 0036-8832
• DOI: 10.1126/science.adi4107
• 发表日期: 2023-07-14
• 页码: 209-215
• 关键词: efficient; photovoltaics; iodide; SURFACES; layers

摘要

Perovskite solar cells (PSCs) consisting of interfacial two- and three-dimensional heterostructures that incorporate ammonium ligand intercalation have enabled rapid progress toward the goal of uniting performance with stability. However, as the field continues to seek ever-higher durability, additional tools that avoid progressive ligand intercalation are needed to minimize degradation at high temperatures. We used ammonium ligands that are nonreactive with the bulk of perovskites and investigated a library that varies ligand molecular structure systematically. We found that fluorinated aniliniums offer interfacial passivation and simultaneously minimize reactivity with perovskites. Using this approach, we report a certified quasi-steady-state power-conversion efficiency of 24.09% for inverted-structure PSCs. In an encapsulated device operating at 85 degrees C and 50% relative humidity, we document a 1560-hour T-85 at maximum power point under 1-sun illumination.