Halogenation‐Regulated Electron‐Phonon Coupling Stabilizes Delocalized Excitation Toward High‐Performance Organic Solar Cells
Zhihao Chen·Jianhui Hou·Chenyujie Zhu·Wenye Xu·Enhui Zhai·Zhen Fu·Xiangqian Lu·Wei Qin·Xiaotao Hao·Shaoqing Zhang
Non-radiative energy loss remains a critical limitation to further improving the efficiency of organic solar cells (OSCs), as charge generation is typically governed by charge-transfer (CT) states that intrinsically suffer from non-radiative recombination. Intra-moiety excitation (i-EX), a delocalized excitation capable of dissociating within acceptor domains, provides an alternative pathway that can reduce CT-mediated loss. However, its molecular regulation and intrinsic photophysical character