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High performance organic solar cells enabled by an iodinated additive
Yu, Qingqing1,2; Fu, Jiehao1; Chen, Haiyan1; Chen, Shanshan3; Hu, Dingqin1; Yang, Ke1; Kan, Zhipeng1; Sun, Kuan3; Lu, Shirong1,2; Xiao, Zeyun1,2
2021-06-01
摘要Additive engineering is a simple and effective strategy to enhance the efficiency of organic solar cells (OSCs). However, traditional additives such as 1,8-diiodooctane (DIO) or 1-chloronaphthalene (CN), suffer from inferior stability, concentration sensitivity, and need additional thermal treatments, which are not desirable for industrial application. Here we introduce a simple, effective and versatile solid additive 1,3-diiodobenzene (1,3-DIB) into the OSCs. In comparison to the control devices, the 1,3-DIB treated OSCs exhibit significantly improved performance with a power conversion efficiency (PCE) of 16.90% for polymer OSCs and a PCE of 14.35% for binary all-small-molecule OSCs. Mechanism studies reveal that 1,3-DIB can improve charge transport and extraction, decrease charge recombination, enhance crystallinity and improve the phase separation. Furthermore, no thermal annealing is needed in PM6:Y6 based OSCs and the 1,3-DIB treated devices show excellent stability and reproducibility in both polymer and small molecule OSCs. Our results demonstrated that additive engineering is a powerful method to enhance the OSC performance.
关键词Organic solar cells Additive engineering Morphology
DOI10.1016/j.orgel.2021.106161
发表期刊ORGANIC ELECTRONICS
ISSN1566-1199
卷号93页码:7
通讯作者Lu, Shirong(lushirong@cigit.ac.cn) ; Xiao, Zeyun(xiao.z@cigit.ac.cn)
收录类别SCI
WOS记录号WOS:000674507800007
语种英语