Improving Photovoltaic Performance and Stability of Perovskite Solar Cells via Molecular Bridge Strategy

• DOI: 10.1002/adom.202300684
• Publication Date: 2023-06-19T03:26:24Z
• Authors: Yinrun Yang; Tingting Wei; Xuxia Shai; Qinghe Song; Chunhua Zeng; Dongmei He; Hong Zhang; Jiangzhao Chen
• Keywords: Thermal Stability

Abstract Although perovskite solar cells (PSCs) are regarded as one of the most promising photovoltaic technologies, interfacial defects and energy barrier main bottlenecks for further improving their performance stability. Herein, an effective, facile “molecular bridge” strategy to improve stability PSCs simultaneously is reported. This realized by introducing a self‐assembly molecule, namely, 5‐fluoro‐pyridine carboxylic acid (5‐FPA), modify SnO 2 /perovskite buried interface. The functional groups (F CO) 5‐FPA form strong chemical interactions with layers, which carrier extraction film quality better crystallization less strain. As result, substantially improved power conversion efficiencies exceeding 23%, accompanied enhanced under thermal ambient conditions. study opens new avenue photovoltaics through strategy.