Low-Cost Solar Cell Based on a Composite of Silicon Nanowires and a Highly Conductive Nonphotoactive Polymer

Authors

  • Zhen Liu,

    1. Nano-organic Photoelectronic Laboratory and Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing (P.R. China)
    2. Center of Super-Diamond and Advanced Film (COSDAF) & Department of Physics and Materials Science, City University of Hong Kong (Hong Kong S.A.R.)
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  • Dr. Hui Wang,

    1. Nano-organic Photoelectronic Laboratory and Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing (P.R. China)
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  • Man-Keung Fung,

    1. Center of Super-Diamond and Advanced Film (COSDAF) & Department of Physics and Materials Science, City University of Hong Kong (Hong Kong S.A.R.)
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  • Prof. Chun-Sing Lee,

    Corresponding author
    1. Center of Super-Diamond and Advanced Film (COSDAF) & Department of Physics and Materials Science, City University of Hong Kong (Hong Kong S.A.R.)
    • Chun-Sing Lee, Center of Super-Diamond and Advanced Film (COSDAF) & Department of Physics and Materials Science, City University of Hong Kong (Hong Kong S.A.R.)===

      Xiao-Hong Zhang, Nano-organic Photoelectronic Laboratory and Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing (P.R. China)===

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  • Prof. Xiao-Hong Zhang

    Corresponding author
    1. Nano-organic Photoelectronic Laboratory and Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing (P.R. China)
    • Chun-Sing Lee, Center of Super-Diamond and Advanced Film (COSDAF) & Department of Physics and Materials Science, City University of Hong Kong (Hong Kong S.A.R.)===

      Xiao-Hong Zhang, Nano-organic Photoelectronic Laboratory and Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing (P.R. China)===

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Abstract

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Hybrid bulk heterojunction solar cells based on inorganic-nanowire (NW)/conjugated-polymer composites have been shown to achieve a power conversion efficiency (PCE) of 1–3 %, which is much lower than theoretically expected. This work addresses the short exciton diffusion lengths in common photoactive polymers with a new solar-cell design that has a PCE of 4.68 % (see scheme; ITO=indium tin oxide, G-PEDOT:PSS=glycerol-doped poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate); E=electropolymerized; a=amorphous).

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