Science China Chemistry

, Volume 61, Issue 11, pp 1405–1412 | Cite as

Short-axis substitution approach on ladder-type benzodithiophene-based electron acceptor toward highly efficient organic solar cells

  • Jiu-Dong Lin
  • Lian Zhong
  • Fu-Peng Wu
  • Yongxi LiEmail author
  • Yi Yuan
  • Haijun Bin
  • Zhanjun ZhangEmail author
  • Feng LiuEmail author
  • Jian Fan
  • Zhi-Guo Zhang
  • Liang-Sheng Liao
  • Zuo-Quan JiangEmail author
  • Yongfang Li


Short-axis substitution, as an effective way to change the optical and electronic properties of the organic semiconductors for organic photovoltaics (OPVs), is a readily approach to modify non-fullerene acceptors, especially for the linear fused rings system. Here, two new fused-ring electron acceptors (CBT-IC and SBT-IC) were designed and developed by short-axis modification based on the dithienyl[1,2-b:4,5-b′]benzodithiophene (BDCPDT) system. Combined with a medium bandgap polymer donor J71, both of the OPV devices exhibit high power conversion efficiency (PCE) over 11%, and ~70% external quantum efficiencies. To better understand how this kind of substitution affects the BDCPDT based acceptors, a comparative analysis is also made with the the plain acceptor BDT-IC without this modification. We believe this work could disclose the great potential and the versatility of BDCPDT block and also enlighten other ladder-type series for further optimization.


organic photovoltaics electron acceptors ladder-type unit benzo[1,2-b:4,5-b′]dithiophene short-axis 


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This work was supported by the National Natural Science Foundation of China (61575136, 21504062, 91633301, 91433117, 21572152), the National Key R&D Program of China (2016YFB0400700), the Collaborative Innovation Center of Suzhou Nano Science and Technology (Nano-CIC), the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD), the “111” Project of the State Administration of Foreign Experts Affairs of China, and the Yunnan Provincial Research Funds on College-Enterprise Collaboration (2015IB016). We thank Yun Li for MALDI-TOF test and Zhuo Xu for TEM test. Jiu-Dong Lin and Lian Zhong contributed equally to this work.

Supplementary material

11426_2018_9275_MOESM1_ESM.docx (4.3 mb)
Short-Axis Substitution Approach on Ladder-Type Benzodithiophene-Based Electron Acceptor toward Highly Efficient Organic Solar Cells


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Copyright information

© Science China Press and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM)Soochow UniversitySuzhouChina
  2. 2.University of Chinese Academy of SciencesBeijingChina
  3. 3.Beijing National Laboratory for Molecular Sciences, Institute of ChemistryChinese Academy of SciencesBeijingChina
  4. 4.Department of Physics and Astronomy, and Collaborative Innovation Center of IFSA (CICIFSA)Shanghai Jiaotong UniversityShanghaiChina

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