Donor-Acceptor Oligothiophenes as Low Optical Gap Chromophores for Photovoltaic Applications

Authors

  • Ping Fang Xia,

    1. Department of Chemistry and Centre for Advanced Luminescence Materials, Hong Kong Baptist University, Kowloon Tong, Hong Kong SAR (PR China)
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  • Xin Jiang Feng,

    1. Department of Chemistry and Centre for Advanced Luminescence Materials, Hong Kong Baptist University, Kowloon Tong, Hong Kong SAR (PR China)
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  • Jianping Lu,

    Corresponding author
    1. Institute for Microstructural Sciences (IMS), National Research Council of Canada (NRC) 1200 Montreal Road, Ottawa, ON K1A 0R6 (Canada)
    • Institute for Microstructural Sciences (IMS), National Research Council of Canada (NRC) 1200 Montreal Road, Ottawa, ON K1A 0R6 (Canada).
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  • Sai-Wing Tsang,

    1. Institute for Microstructural Sciences (IMS), National Research Council of Canada (NRC) 1200 Montreal Road, Ottawa, ON K1A 0R6 (Canada)
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  • Raluca Movileanu,

    1. Institute for Microstructural Sciences (IMS), National Research Council of Canada (NRC) 1200 Montreal Road, Ottawa, ON K1A 0R6 (Canada)
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  • Ye Tao,

    Corresponding author
    1. Institute for Microstructural Sciences (IMS), National Research Council of Canada (NRC) 1200 Montreal Road, Ottawa, ON K1A 0R6 (Canada)
    • Institute for Microstructural Sciences (IMS), National Research Council of Canada (NRC) 1200 Montreal Road, Ottawa, ON K1A 0R6 (Canada).
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  • Man Shing Wong

    Corresponding author
    1. Department of Chemistry and Centre for Advanced Luminescence Materials, Hong Kong Baptist University, Kowloon Tong, Hong Kong SAR (PR China)
    • Department of Chemistry and Centre for Advanced Luminescence Materials, Hong Kong Baptist University, Kowloon Tong, Hong Kong SAR (PR China).
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  • We are grateful to the Hong Kong Research Grants Council for financial support of this work (HKBU 2020/06P). We thank Dr. Jean-Marc Baribeau at IMS-NRC for fruitful technical discussion. Supporting Information is available online from Wiley InterScience or from the author.

Abstract

original image

Extended donor-acceptor oligothiophenes exhibit a narrow optical energy gap in combination with strong light absorption and good intermolecular ππ stacking in the solid state for efficient charge transport. Bilayer photovoltaic devices utilizing these oligomers as p-type semiconducting photosensitizers afford high power conversion efficiencies of up to 2.7%.

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