轨道能级差
离域电子
电子受体
激子
有机太阳能电池
化学
接受者
电子
电子传输链
电子供体
分子振动
光化学
离解(化学)
材料科学
化学物理
聚合物
分子
物理
物理化学
有机化学
凝聚态物理
量子力学
生物化学
催化作用
作者
Yuan Guo,Guangchao Han,Yuanping Yi
标识
DOI:10.1002/ange.202205975
摘要
Abstract The A‐DA′D‐A fused‐ring electron acceptors with an angular fusion mode and electron‐deficient core has significantly boosted organic photovoltaic efficiency. Here, the intrinsic role of the peculiar structure is revealed by comparing representative A‐DA′D‐A acceptor Y6 with its A‐D‐A counterparts having different fusion modes. Owing to the more delocalized HOMO and deeper LUMO level, Y6 exhibits stronger and red‐shifted absorption relative to the linear and angular fused A‐D‐A acceptors, respectively. Moreover, the change from linear to angular fusion substantially reduces the electron‐vibration couplings, which is responsible for the faster exciton diffusion, exciton dissociation, and electron transport for Y6 than the linear fused A‐D‐A acceptor. Notably, the electron‐vibration coupling for exciton dissociation is further decreased by introducing the electron‐deficient core, thus contributing to the efficient charge generation under low driving forces in the Y6‐based devices.
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