Localized Electrostatic Interaction Stabilize Perovskite Solar Cells

作者：Kailin Li, Zijian Huang, Huachao Zai, Zhongyang Zhang, Feng Wang, Xiao Zhu, Yicheng Wu, Yu Zhang, Fengtao Pei, Rundong Fan, Xiuxiu Niu, Yanrun Chen, Huifen Liu, Ruiyang Yin, Xinmeng Zhuang, Julian A. Steele, Cheng Zhu, Yihua Chen, Tinglu Song, Qi Chen, Huanping Zhou · 发表于：Advanced Materials · 年份：2025 · DOI：10.1002/adma.202517685 · 被引用次数：8 · 研究领域：Perovskite Materials and Applications、TiO2 Photocatalysis and Solar Cells、Organic Light-Emitting Diodes Research

Abstract Metal halide perovskite solar cells (PSCs) have shown great promise for commercialization, yet the weak bonding nature of perovskites renders them vulnerable to external stimuli, undermining the operational longevity of PSCs. Methods aimed at strengthening bonding within perovskite constituents still failed to realize both “high efficiency” and “high stability” in single device. Herein, a localized electrostatic interaction strategy is proposed by employing an unexplored and well‐designed organic cation, tetramethyldipropylene‐triammonium (IDPA 3+ ). IDPA 3+ features sterically constrained multi‐interaction sites that enable strong localized electrostatic interactions with [PbI 6 ] 4− octahedra, inducing perovskite lattice compression. This compression improves perovskite lattice energy through strengthened chemical bonding within bulk lattice, ultimately reinforcing structural stability while simultaneously suppressing ion migration. Consequently, modified formamidinium lead iodide (FAPbI 3 ) devices displayed state‐of‐the‐art stability, showing negligible performance loss under continuous operation at 85 °C and damp‐heat test. Notably, the p‐i‐n device achieved a certified power conversion efficiency (PCE) of 25.28% for 1.00 cm 2 , among the highest published certified PCEs. Overall, this work presents localized electrostatic interaction engineering as a promising strategy to intrinsically stabilize perovskite microstructure, bridging the gap between electrostatic ...