Amorphous Zinc Stannate (Zn2SnO4) Nanofibers Networks as Photoelectrodes for Organic Dye-Sensitized Solar Cells

Authors

  • Seung-Hoon Choi,

    1. Department of Chemical Engineering, Hanyang University, Seoul 133-791, Republic of Korea
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  • Daesub Hwang,

    1. Polymer Hybrid Center, Korea Institute of Science and Technology, P. O. Box 131, Cheongryang, Seoul 130-650, Republic of Korea
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  • Dong-Young Kim,

    1. Polymer Hybrid Center, Korea Institute of Science and Technology, P. O. Box 131, Cheongryang, Seoul 130-650, Republic of Korea
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  • Yann Kervella,

    1. INAC/SPrAM UMR 5819 CEA-CNRS-Univ.J.Fourier-Grenoble 1, LEMOH, 17 Rue des Martyrs, 38054 Grenoble Cedex 9, France
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  • Pascale Maldivi,

    1. INAC/SCIB UMR E3 CEA- Univ.J.Fourier-Grenoble 1, 17 Rue des Martyrs, 38054 Grenoble Cedex 9, France.
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  • Sung-Yeon Jang,

    Corresponding author
    1. Department of Chemistry, Kookmin University, Seoul 136-702, Republic of Korea
    • Department of Chemistry, Kookmin University, Seoul 136-702, Republic of Korea
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  • Renaud Demadrille,

    Corresponding author
    1. INAC/SPrAM UMR 5819 CEA-CNRS-Univ.J.Fourier-Grenoble 1, LEMOH, 17 Rue des Martyrs, 38054 Grenoble Cedex 9, France
    • INAC/SPrAM UMR 5819 CEA-CNRS-Univ.J.Fourier-Grenoble 1, LEMOH, 17 Rue des Martyrs, 38054 Grenoble Cedex 9, France
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  • Il-Doo Kim

    Corresponding author
    1. Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Republic of Korea
    • Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Republic of Korea.
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Abstract

A new strategy for developing dye-sensitised solar cells (DSSCs) by combining thin porous zinc tin oxide (Zn2SnO4) fiber-based photoelectrodes with purely organic sensitizers is presented. The preparation of highly porous Zn2SnO4 electrodes, which show high specific surface area up to 124 m2/g using electrospinning techniques, is reported. The synthesis of a new organic donor-conjugate-acceptor (D-π-A) structured orange organic dye with molar extinction coefficient of 44 600 M−1 cm−1 is also presented. This dye and two other reference dyes, one organic and a ruthenium complex, are employed for the fabrication of Zn2SnO4 fiber-based DSSCs. Remarkably, organic dye-sensitized DSSCs displayed significantly improved performance compared to the ruthenium complex sensitized DSSCs. The devices based on a 3 μm-thick Zn2SnO4 electrode using the new sensitizer in conjunction with a liquid electrolyte show promising photovoltaic conversion up to 3.7% under standard AM 1.5G sunlight (100 mW cm−2). This result ranks among the highest reported for devices using ternary metal oxide electrodes.

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