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Small molecule donor based on alkoxylated benzothiadiazole unit: Synthesis and photovoltaics properties
Meng, Wei1,2; Lv, Jie2; Duan, Tainan2; Kan, Zhipeng2; Lu, Shirong2; Dai, Xuexin2,3; Li, Zhefeng1
2020-06-01
摘要Two small molecule donors (namely BTRO and BTCN) based on the benzothiadiazole unit were synthesized in this study. In comparison to BTRO, BTCN has a narrower absorption spectrum, however, BTCN has better crystallinity, higher carrier mobility, and better light absorption that is complementary to IDIC-4F. Non-fullerene all small molecule organic solar cells (SM-OSCs) based on BTCN: IDIC-4F exhibited a power conversion efficiency (PCE) of 4.62% with short circuit current density (J(sc)) of 11.46 mA/cm(2), open-circuit voltage (V-oc) of 0.89 V, and fill factor (FF) of 0.45. In contrast, non-fullerene SM-OSCs based on BTRO: IDIC-4F showed PCE, J(sc), V-oc, and FF values of 4.08%, 11.04 mA/cm(2), 0.91 V, and 0.41, respectively. Our results show that benzothiadiazole is a very good acceptor unit for regulating the absorption and energy levels of non-fullerene SM-OSCs.
关键词Benzothiadiazole Non-fullerene Small molecule donor All small molecule organic solar cells
DOI10.1016/j.matchemphys.2020.122874
发表期刊MATERIALS CHEMISTRY AND PHYSICS
ISSN0254-0584
卷号247页码:9
通讯作者Duan, Tainan(tnduan@cigit.ac.cn) ; Kan, Zhipeng(kanzhipeng@cigit.ac.cn) ; Li, Zhefeng(zhefeng@cqu.edu.cn)
收录类别SCI
WOS记录号WOS:000530647200028
语种英语