激子
轨道能级差
电子受体
化学
离域电子
有机太阳能电池
电子
接受者
电子传输链
分子振动
离解(化学)
电子供体
化学物理
光化学
材料科学
物理
聚合物
分子
物理化学
有机化学
凝聚态物理
生物化学
量子力学
催化作用
作者
Yuan Guo,Guangchao Han,Yuanping Yi
标识
DOI:10.1002/anie.202205975
摘要
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.
科研通智能强力驱动
Strongly Powered by AbleSci AI