Citation: Yu Changshi, Xu Yunhua, Liang Shijie, Jiang Xudong, Feng Guitao, Li Cheng, Li Weiwei. Ethynyl-linked perylene bisimide based electron acceptors for non-fullerene organic solar cells[J]. Chinese Chemical Letters, ;2018, 29(2): 325-327. doi: 10.1016/j.cclet.2017.08.016 shu

Ethynyl-linked perylene bisimide based electron acceptors for non-fullerene organic solar cells

Yu Changshi ^a,b ,
Xu Yunhua ^a,, ,
Liang Shijie ^a,b ,
Jiang Xudong ^a,b ,
Feng Guitao ^a,b ,
Li Cheng ^b,, ,
Li Weiwei ^b,,

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

Corresponding author: Xu Yunhua, yhxu@bjtu.edu.cn Li Cheng, licheng1987@iccas.ac.cn Li Weiwei, liweiwei@iccas.ac.cn
Received Date: 10 June 2017
Revised Date: 10 August 2017
Accepted Date: 13 August 2017
Available Online: 19 February 2017

Figures(6)

In this work, star-shaped perylene bisimide (PBI) derivatives with spiro-aromatic cores linked with ethynyl units were developed as electron acceptors for non-fullerene organic solar cells. The ethynyl linkers were found to enhance the planarity of the conjugated backbone, resulting in high electron mobilities and near-infrared absorption. The ethynyl-linked PBI acceptors showed high power conversion efficiencies (PCEs) up to 4.27% due to the high short-circuit current density (J_sc) of 8.52 mA/cm² and fill factor (FF) of 0.59, while the PBI acceptor without ethynyl units provided a low PCE of 3.57% in nonfullerene solar cells. The results demonstrate that ethynyl units can be applied into designing new PBI electron acceptors with improved charge transport properties and photovoltaic performance.
- Electron acceptor,
- Non-fullerene organic solar cells,
- Perylene bisimide,
- Charge transport,
- Ethynyl
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