A Narrow‐Bandgap n‐Type Polymer with an Acceptor–Acceptor Backbone Enabling Efficient All‐Polymer Solar Cells

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  • Huiliang Sun
    Department of Materials Science and Engineering Southern University of Science and Technology (SUSTech) No. 1088, Xueyuan Road Shenzhen Guangdong 518055 P. R. China
  • Han Yu
    Department of Chemistry and Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration & Reconstruction Hong Kong University of Science and Technology (HKUST) Clear Water Bay, Kowloon Hong Kong P. R. China
  • Yongqiang Shi
    Department of Materials Science and Engineering Southern University of Science and Technology (SUSTech) No. 1088, Xueyuan Road Shenzhen Guangdong 518055 P. R. China
  • Jianwei Yu
    Department of Physics Chemistry and Biology (IFM) Linköping University Linköping SE‐58183 Sweden
  • Zhongxiang Peng
    School of Materials Science and Engineering Tianjin Key Laboratory of Molecular Optoelectronic Science Tianjin University Tianjin 300350 P. R. China
  • Xianhe Zhang
    Department of Materials Science and Engineering Southern University of Science and Technology (SUSTech) No. 1088, Xueyuan Road Shenzhen Guangdong 518055 P. R. China
  • Bin Liu
    Department of Materials Science and Engineering Southern University of Science and Technology (SUSTech) No. 1088, Xueyuan Road Shenzhen Guangdong 518055 P. R. China
  • Junwei Wang
    Department of Materials Science and Engineering Southern University of Science and Technology (SUSTech) No. 1088, Xueyuan Road Shenzhen Guangdong 518055 P. R. China
  • Ranbir Singh
    Department of Energy & Materials Engineering Dongguk University Seoul 100‐715 Republic of Korea
  • Jaewon Lee
    Department of Chemical Engineering and Applied Chemistry Chungnam National University Daejeon 34134 Republic of Korea
  • Yongchun Li
    Department of Materials Science and Engineering Southern University of Science and Technology (SUSTech) No. 1088, Xueyuan Road Shenzhen Guangdong 518055 P. R. China
  • Zixiang Wei
    Department of Materials Science and Engineering Southern University of Science and Technology (SUSTech) No. 1088, Xueyuan Road Shenzhen Guangdong 518055 P. R. China
  • Qiaogan Liao
    Department of Materials Science and Engineering Southern University of Science and Technology (SUSTech) No. 1088, Xueyuan Road Shenzhen Guangdong 518055 P. R. China
  • Zhipeng Kan
    Chongqing Institute of Green and Intelligent Technology Chongqing School University of Chinese Academy of Sciences (UCAS Chongqing) Chinese Academy of Sciences Chongqing 400714 P. R. China
  • Long Ye
    School of Materials Science and Engineering Tianjin Key Laboratory of Molecular Optoelectronic Science Tianjin University Tianjin 300350 P. R. China
  • He Yan
    Department of Chemistry and Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration & Reconstruction Hong Kong University of Science and Technology (HKUST) Clear Water Bay, Kowloon Hong Kong P. R. China
  • Feng Gao
    Department of Physics Chemistry and Biology (IFM) Linköping University Linköping SE‐58183 Sweden
  • Xugang Guo
    Department of Materials Science and Engineering Southern University of Science and Technology (SUSTech) No. 1088, Xueyuan Road Shenzhen Guangdong 518055 P. R. China

書誌事項

公開日
2020-09-21
権利情報
  • http://onlinelibrary.wiley.com/termsAndConditions#vor
DOI
  • 10.1002/adma.202004183
公開者
Wiley

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説明

<jats:title>Abstract</jats:title><jats:p>Narrow‐bandgap polymer semiconductors are essential for advancing the development of organic solar cells. Here, a new narrow‐bandgap polymer acceptor L14, featuring an acceptor–acceptor (A–A) type backbone, is synthesized by copolymerizing a dibrominated fused‐ring electron acceptor (FREA) with distannylated bithiophene imide. Combining the advantages of both the FREA and the A–A polymer, L14 not only shows a narrow bandgap and high absorption coefficient, but also low‐lying frontier molecular orbital (FMO) levels. Such FMO levels yield improved electron transfer character, but unexpectedly, without sacrificing open‐circuit voltage (<jats:italic>V</jats:italic><jats:sub>oc</jats:sub>), which is attributed to a small nonradiative recombination loss (<jats:italic>E</jats:italic><jats:sub>loss,nr</jats:sub>) of 0.22 eV. Benefiting from the improved photocurrent along with the high fill factor and <jats:italic>V</jats:italic><jats:sub>oc</jats:sub>, an excellent efficiency of 14.3% is achieved, which is among the highest values for all‐polymer solar cells (all‐PSCs). The results demonstrate the superiority of narrow‐bandgap A–A type polymers for improving all‐PSC performance and pave a way toward developing high‐performance polymer acceptors for all‐PSCs.</jats:p>

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