N‐Heterocycle‐Activated π‐Cooperative Coordination for Enhancing Structural Stability of Perovskite Solar Cells
Abstract
ABSTRACT The chemistry of buried interfaces critically dictates the crystallization behavior of perovskite semiconductors in inverted perovskite solar cells, yet remains poorly controlled, giving rise to interfacial coordination disorder that disrupts the organization of self‐assembled monolayers (SAMs) during crystallization. Here, we report an N‐heterocycle‐activated coordination strategy that stabilizes SAM organization while enabling precise regulation of precursor chemistry and crystallization at SAM‐perovskite interfaces. Imidazolium‐derived molecules integrated into SAMs establish cooperative coordination interactions with neighbouring lead polyhalide species, thereby reshaping the local precursor environment and directing nucleation and crystal growth. This process gives rise to a π‐cooperative coordination interaction at the buried interface, which suppresses interfacial grooves and voids, reduces residual solvent–complex intermediates, and promotes the direct formation of phase‐pure α‐perovskite films. Devices based on this molecularly regulated interface achieve a power conversion efficiency of 26.83% and retain 93.8% of their initial efficiency after 936 h of continuous maximum power point operation. These results establish coordination‐mediated interfacial design as a molecular route to couple interfacial order with crystallization control in perovskite semiconductors.
Article Details
Authors (14)
Yuanshan Xiao
Centre for Advanced Optoelectronics School of Intelligent Manufacturing and Future Energy Gannan Normal University Ganzhou China
Jie Chen
Haixia Lu
Xu Li
Xinyu Cheng
The MOE Basic Research and Innovation Center for the Targeted Therapeutics of Solid Tumors, School of Basic Medical Sciences, The Second Affiliated Hospital, Jiangxi Medical College, Nanchang University, Nanchang, Jiangxi, China.
Shaoyu Liu
Centre for Advanced Optoelectronics School of Intelligent Manufacturing and Future Energy Gannan Normal University Ganzhou China
Yuxin Zhou
Zhonggao Zhou
College of Chemistry and Materials Science Analysis and Testing Center Key Laboratory of Jiangxi University for Functional Materials Chemistry Jiangxi Provincial Key Laboratory of Bamboo Fiber Composite Gannan Normal University Ganzhou China
Junlei Zhou
State Key Laboratory of Precision Spectroscopy, School of Physics, East China Normal University 1 , Shanghai 200241,
Zhengchi Yang
Centre for Advanced Optoelectronics School of Intelligent Manufacturing and Future Energy Gannan Normal University Ganzhou China
Gengling Liu
College of Chemistry and Chemical Engineering Gannan Normal University Ganzhou Jiangxi China
Zhi Xing
School of Chemistry and Chemical Engineering Gannan Normal University Ganzhou Jiangxi P. R. China
Jinwei Gao
Yiwang Chen
College of Chemistry and Chemical Engineering/Film Energy Chemistry for Jiangxi Provincial Key Laboratory (FEC), Nanchang University, Nanchang, China.