Extending Se substitution to the limit: from 5S to 5Se in high-efficiency non-fullerene acceptors
作者
Song, GK (Song, Guangkun) [1] , [2] , [3] ; Feng, WY (Feng, Wanying) [1] , [2] , [3] ; Li, Y (Li, Yu) [1] , [2] , [3] ; Liang, HZ (Liang, Huazhe) [1] , [2] , [3] ; Li, ZX (Li, Zhixiang) [1] , [2] , [3] ; Kan, B (Kan, Bin) [4] ; Wan, XJ (Wan, Xiangjian) [1] , [2] , [3] ; Yao, ZY (Yao, Zhaoyang) [1] , [2] , [3] ; Li, CX (Li, Chenxi) [1] , [2] , [3] ; Chen, YS (Chen, Yongsheng) [1] , [2] , [3]
(由 Clarivate 提供)
出版时间
AUG 22 2023
在线发表
JUL 2023
已索引
2023-08-19
文献类型
Article
跳转至
摘要
Based on the newly synthesized seleno[3,2-b]selenophene unit, two near-infrared non-fullerene acceptors (NFAs) of 4Se and 5Se are constructed by replacing four or all sulfurs with selenium in high-efficiency Y-series NFAs. Consequently, binary devices based on 4Se and 5Se afford PCEs of 15.17% and 15.23%, respectively, with a photoelectric response approaching 1000 nm. More excitingly, the energy loss of the 5Se-based device was as low as 0.477 eV along with almost the smallest non-radiative loss of & SIM;0.15 eV thus far.
