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陈永胜课题组 | CHINESE JOURNAL OF POLYMER SCIENCE

发布人:    发布时间:2022/09/13   浏览次数:

A Low Reorganization Energy and Two-dimensional Acceptor with Four End Units for Organic Solar Cells with Low E-loss

By:

Chen, HB (Chen, Hongbin) [1] , [2] , [3] ; Cao, XJ (Cao, Xiangjian) [1] , [2] , [3] ; Xu, XY (Xu, Xiaoyun) [4] ; Li, CX (Li, Chenxi) [1] , [2] , [3] ; Wan, XJ (Wan, Xiangjian) [1] , [2] , [3] ; Yao, ZY (Yao, Zhaoyang) [1] , [2] , [3] ; Chen, YS (Chen, Yongsheng) [1] , [2] , [3]

CHINESE JOURNAL OF POLYMER SCIENCE, 2022, 40(8): 921-927 

Special Issue


DOI

10.1007/s10118-022-2730-4

Abstract

A novel two-dimensional A-D-A acceptor named as CH8 with four electron-withdrawing end units has been successfully designed and synthesized. The enlarged conjugation in two directions renders CH8 exhibit an extremely low electron reorganization energy of 98 meV, which makes CH8 a potential candidate for outstanding organic semiconductor material. When blended with PM6, a considerate power conversion efficiency of 9.37% along with a high open-circuit voltage (V-oc) 0.889 V and low energy loss (E-loss) below 0.6 eV is achieved. These results indicate that the two-dimensional A-D-A molecule with four electron-withdrawing end units is an effective molecular design strategy to achieve lower voltage loss and also possible high performance for organic photovoltaics if ideal morphology could be achieved.