Multivalent ligands regulate dimensional engineering for inverted perovskite solar modules

• 成果类型: Article
• 署名作者: Chang, Xiaoming; Liu, Yanping; Ping, Yue; Wu, Nan; Yang, Tinghuan; Tian, Chenqing; Ling, Zhaoheng; Vishal, Badri; Pininti, Anil Reddy; Park, Jong Bin; Jeong, Sang Young; Qin, Yan; Hui, Wing Tung; Yeung, Fion Sze Yan; Yang, Yu-Ying; Liao, Hailiang; Prasetio, Adi; Isikgor, Furkan H.; He, Mingjie; Utomo, Drajad Satrio; Wang, Rongbo; Zhao, Kui; Lanza, Mario; Woo, Han Young; Heeney, Martin; De Wolf, Stefaan; Lin, Yen-Hung; Tsetseris, Leonidas; Azmi, Randi; Anthopoulos, Thomas D.
• 署名单位: King Abdullah University of Science & Technology; The Chinese University of Hong Kong, Shenzhen; Shaanxi Normal University; Korea University; Hong Kong University of Science & Technology; Hong Kong University of Science & Technology; National University of Singapore; Institute for Functional Intelligent Materials (I-FIM); National University of Singapore; National Technical University of Athens; University of Manchester
• 刊物名称: SCIENCE
• ISSN/ISSBN: 0036-8075; 1095-9203
• DOI: 10.1126/science.aea0656
• 发表日期: 2026-01-08
• 页码: 153-159
• 关键词: cells

摘要

Multivalent, resonance-stabilized amidinium ligands enable stronger chemical coordination and reduced deprotonation compared with conventional monovalent ammonium ligands in low-dimensional perovskites. Here, we introduce a controllable one- to two-dimensional (1D-to-2D) structural transition strategy by systematically tuning ligand conformation, thereby modulating hydrogen bonding, pi-pi stacking, and basicity to elucidate the relationship between molecular structure, interfacial interactions, and resulting dimensionality. The 1D-amidinium perovskite structure, with its pronounced geometric anisotropy, impedes uniform surface coverage and defect passivation. In contrast, the 2D-amidinium perovskite forms a continuous, homogeneous interfacial layer, enabling more effective defect passivation and favorable energy-level alignment. With dimensionality control, inverted 3D/2D-amidinium perovskite solar cells deliver 25.4% power conversion efficiency (1.1 square centimeters, steady-state certified) and maintain >95% of their initial efficiency after 1100 hours of continuous 1-sun operation at 85 degrees C.