Terminally Chlorinated and Thiophene-linked Acceptor-Donor-Acceptor Structured 3D Acceptors with Versatile Processability for High-efficiency Organic Solar Cells
作者
Chen, HB (Chen, Hongbin) [1] , [2] , [3] , [4] ; Kan, B (Kan, Bin) [1] ; Wang, PR (Wang, Peiran) [2] , [3] , [4] ; Feng, WY (Feng, Wanying) [2] , [3] , [4] ; Li, LY (Li, Longyu) [2] , [3] , [4] ; Zhang, SC (Zhang, Shuchao) [2] , [3] , [4] ; Chen, TQ (Chen, Tianqi) [1] ; Yang, Y (Yang, Yang) [5] ; Duan, TA (Duan, Tainan) [6] ; Yao, ZY (Yao, Zhaoyang) [2] , [3] , [4] ; Li, CX (Li, Chenxi) [2] , [3] , [4] ; Wan, XJ (Wan, Xiangjian) [2] , [3] , [4] ; Chen, YS (Chen, Yongsheng) [2] , [3] , [4]
在线发表
AUG 2023
已索引
2023-08-25
文献类型
Article; Early Access
摘要
To exploit the potential of our newly developed three-dimensional (3D) dimerized acceptors, a series of chlorinated 3D acceptors (namely CH8-3/4/5) were reported by precisely tuning the position of chlorine (Cl) atom. The introduction of Cl atom in central unit affects the molecular conformation. Whereas, by replacing fluorinated terminal groups (CH8-3) with chlorinated terminal groups (CH8-4 and CH8-5), the red-shift absorption and enhanced crystallization are achieved. Benefiting from these, all devices received promising power conversion efficiencies (PCEs) over 16 % as well as decent thermal/photo-stabilities. Among them, PM6:CH8-4 based device yielded a best PCE of 17.58 %. Besides, the 3D merits with multi alkyl chains enable their versatile processability during the device preparation. Impressive PCEs of 17.27 % and 16.23 % could be achieved for non-halogen solvent processable devices prepared in glovebox and ambient, respectively. 2.88 cm(2) modules also obtained PCEs over 13 % via spin-coating and blade-coating methods, respectively. These results are among the best performance of dimerized acceptors. The decent performance of CH8-4 on small-area devices, modules and non-halogen solvent-processed devices highlights the versatile processing capability of our 3D acceptors, as well as their potential applications in the future.