1. Author's Information
    Xunfan Liao
    State Key Laboratory for Modification of Chemical Fibers and Polymer Materials & College of Materials Science and Engineering, Donghua University, Shanghai 201620, China

    Xueliang Shi
    Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200062, P. R. China

    Ming Zhang
    School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China

    Ke Gao
    Department of Materials Science and Engineering, University of Washington, Seattle, WA, USA

    Lijian Zuo
    Department of Materials Science and Engineering, University of Washington, Seattle, WA, USA

    Feng Liu
    School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China

    Yiwang Chen
    State Key Laboratory for Modification of Chemical Fibers and Polymer Materials & College of Materials Science and Engineering, Donghua University, Shanghai 201620, China

    Alex K.-Y. Jen
    Department of Materials Science and Engineering, University of Washington, Seattle, WA, USA

  2. Abstract
    A novel near-infrared-light-absorbing fused-ring electron acceptor, STIC, was developed for organic solar cells. STIC exhibited a narrow bandgap with an absorption edge reaching 940 nm, which was ascribed to the strong electron-rich selenophene-thieno[3,2-b]thiophene–selenophene (ST) unit and strong intramolecular charge transfer of STIC. Also, STIC-based devices showed low open-circuit voltage (Voc) loss values, attributed to the rigid ST core providing low reorganization energy. The device based on the PBDB-T:STIC blend exhibited a power conversion efficiency (PCE) of 9.68% with a high short-circuit current density (Jsc) of 19.96 mA cm−2 and a low Voc loss of 0.55 eV.
    Keywords
    small voltage loss,electron acceptor,Fused selenophene

    ADLID: 121166-v0
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  1. Keywords
    small voltage loss electron acceptor Fused selenophene
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