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Simple thiazole-centered oligothiophene donor enables 15.4% efficiency all small molecule organic solar cells
Duan, Tainan1; Chen, Qianqian1; Yang, Qianguang1; Hu, Dingqin1; Cai, Guilong2; Lu, Xinhui2; Lv, Jie1; Song, Hang1; Zhong, Cheng3; Liu, Feng4
2021-12-21
摘要Attributed to the rapid development of benzodithiophene (BDT) centered small molecule donors, all small molecule organic solar cells (ASM-OSCs) have achieved comparable power conversion efficiencies (PCEs) (>15%) along with high reproducibility, in contrast to polymer-based OSCs. However, the difficulty and complexity of synthesizing BDT-derived donors limit their cost performance and commercial application. Distinct from the relatively high synthetic complexity that exhibited by most BDT-derived small molecule donors, oligothiophene donors are much more accessible. However, the performance of oligothiophene donors has been unsatisfactory (PCE < 12%). Here, by employing an A-pi-A'-pi-A structure, a novel thiazole-centered cost-effective oligothiophene donor Tz6T is developed. By incorporating a nonfullerene acceptor eC9-4F, Tz6T based binary ASM-OSCs achieve a milestone efficiency of 15.4% (the certified PCE is 14.8%). This PCE record not only pushes oligothiophene to the forefront of small molecule donors, but also represented one of the crest values achieved by oligothiophene donors.
DOI10.1039/d1ta09058e
发表期刊JOURNAL OF MATERIALS CHEMISTRY A
ISSN2050-7488
页码9
通讯作者Hu, Dingqin(hudingqin@cigit.ac.cn) ; Lu, Xinhui(xhlu@phy.cuhk.edu.hk) ; Zhong, Cheng(zhongcheng@whu.edu.cn) ; Lu, Shirong(lushirong@cigit.ac.cn)
收录类别SCI
WOS记录号WOS:000739322800001
语种英语