Noncovalently fused-ring electron acceptors with near-infrared absorption for high-performance organic solar cells

Hao Huang, Qingxin Guo, Shiyu Feng, Cai’e Zhang, Zhaozhao Bi, Wenyue Xue, Jinjin Yang, Jinsheng Song, Cuihong Li, Xinjun Xu (), Zheng Tang (), Wei Ma () and Zhishan Bo ()
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Hao Huang: College of Chemistry, Beijing Normal University
Qingxin Guo: College of Chemistry, Beijing Normal University
Shiyu Feng: College of Chemistry, Beijing Normal University
Cai’e Zhang: College of Chemistry, Beijing Normal University
Zhaozhao Bi: Xi’an Jiaotong University
Wenyue Xue: Xi’an Jiaotong University
Jinjin Yang: Donghua University
Jinsheng Song: Henan University
Cuihong Li: College of Chemistry, Beijing Normal University
Xinjun Xu: College of Chemistry, Beijing Normal University
Zheng Tang: Donghua University
Wei Ma: Xi’an Jiaotong University
Zhishan Bo: College of Chemistry, Beijing Normal University

Nature Communications, 2019, vol. 10, issue 1, 1-10

Abstract: Abstract Non-fullerene fused-ring electron acceptors boost the power conversion efficiency of organic solar cells, but they suffer from high synthetic cost and low yield. Here, we show a series of low-cost noncovalently fused-ring electron acceptors, which consist of a ladder-like core locked by noncovalent sulfur–oxygen interactions and flanked by two dicyanoindanone electron-withdrawing groups. Compared with that of similar but unfused acceptor, the presence of ladder-like structure markedly broadens the absorption to the near-infrared region. In addition, the use of intramolecular noncovalent interactions avoids the tedious synthesis of covalently fused-ring structures and markedly lowers the synthetic cost. The optimized solar cells displayed an outstanding efficiency of 13.24%. More importantly, solar cells based on these acceptors demonstrate very low non-radiative energy losses. This research demonstrates that low-cost noncovalently fused-ring electron acceptors are promising to achieve high-efficiency organic solar cells.

Date: 2019
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DOI: 10.1038/s41467-019-11001-6

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