Citation: Li Yao, Xu Yunhua, Yang Fan, Jiang Xudong, Li Cheng, You Shengyong, Li Weiwei. Simple non-fullerene electron acceptors with unfused core for organic solar cells[J]. Chinese Chemical Letters, ;2019, 30(1): 222-224. doi: 10.1016/j.cclet.2018.09.014 shu

Simple non-fullerene electron acceptors with unfused core for organic solar cells

Li Yao ^a,b ,
Xu Yunhua ^a,, ,
Yang Fan ^b ,
Jiang Xudong ^b ,
Li Cheng ^b ,
You Shengyong ^c,, ,
Li Weiwei ^b,c,*,,

a.
Department of Chemistry, School of Science, Beijing Jiaotong University, Beijing 100044, China
b.
Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
c.
Institute of Applied Chemistry, Jiangxi Academy of Sciences, Nanchang 330096, China

Corresponding author: Xu Yunhua, yhxu@bjtu.edu.cn You Shengyong, ysygood1981@163.com Li Weiwei, liweiwei@iccas.ac.cn

Received Date: 4 September 2018
Revised Date: 13 September 2018
Accepted Date: 18 September 2018
Available Online: 21 January 2018

Figures(4)

Two simple electron acceptors based on unfused bithiophene core and 1, 1-dicyanomethylene-3-indanone end group were easily prepared via three synthetic steps. These acceptors exhibited broad absorption in the range of 300 nm to 800 nm, aligned energy levels and high crystallinity. When combined with a wide band gap donor polymer in non-fullerene solar cells, an initial power conversion efficiency of 2.4% was achieved. The relatively low efficiencies were due to the large phase separation in blended thin films, which is originated from their high aggregation tendency in thin films. Our results suggest that these electron acceptors with unfused core are promising candidates for commercial application of solar cells due to the low cost starting materials and facile synthesis.
- Organic solar cells,
- Non-fullerene electron acceptors,
- Unfused core,
- High crystallinity,
- Low cost materials
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