Synergistic Regulation of High Dielectric Constant and H‐Aggregation for Efficient and Thickness‐Tolerant Organic Solar Cells
Abstract
ABSTRACT While the power conversion efficiency (PCE) of organic solar cells (OSCs) has advanced rapidly, their sensitivity with respect to active layer thickness hinders industrial fabrication. Herein, a novel acceptor BMD‐6F was synthesized via molecular engineering of L8‐BO, which realizes synergistic optimization of dielectric constant (6.20, 1.5 × that of L8‐BO) and H‐aggregation and thus enriches charge transport pathways, facilitates exciton dissociation, and suppresses recombination. As a result, the PM6:L8‐BO:BMD‐6F ternary OSC delivered a champion PCE of 20.34% at 100 nm, and exhibited excellent thickness tolerance with PCEs of 18.23% (300 nm) and 16.18% (500 nm). This work establishes a design principle for high‐efficiency, thickness‐tolerant OSCs, promising industrial applications.
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Authors: Peng Zhang, Yunhan Gao, Linsen Li, Shuai Xu, Shuhan Yang, Youdi Zhang, Meifang Zhang, Nan Ye, Lixue Zhu, Tao Jia, Sha Liu, Zicheng Ding, Hongxiang Li, Lei Zhu, Qing Jiang, Tonghui Wang, Changduk Yang, Yiwang Chen
Institutions: Jilin University, South China Normal University, Shaanxi Normal University, Ulsan National Institute of Science and Technology, Nanchang University, Changchun Normal University, Great Bay University, Yuzhang Normal University