Photovoltaics Based on Hybridization of Effective Dye-Sensitized Titanium Oxide and Hole-Conductive Polymer P3HT

Authors

  • Ke-Jian Jiang,

    1. Laboratory of New Materials Institute of Chemistry Chinese Academy of Sciences Beijing, 100080 (China)
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  • Kazuhiro Manseki,

    1. Center for Advanced Science and Innovation (CASI) Osaka University/Suita Campus 2-1 Yamada-oka, Suita, Osaka 565-0871 (Japan)
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  • You-Hai Yu,

    1. Center for Advanced Science and Innovation (CASI) Osaka University/Suita Campus 2-1 Yamada-oka, Suita, Osaka 565-0871 (Japan)
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  • Naruhiko Masaki,

    1. Center for Advanced Science and Innovation (CASI) Osaka University/Suita Campus 2-1 Yamada-oka, Suita, Osaka 565-0871 (Japan)
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  • Kazuharu Suzuki,

    1. Center for Advanced Science and Innovation (CASI) Osaka University/Suita Campus 2-1 Yamada-oka, Suita, Osaka 565-0871 (Japan)
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  • Yan-lin Song,

    Corresponding author
    1. Laboratory of New Materials Institute of Chemistry Chinese Academy of Sciences Beijing, 100080 (China)
    • Laboratory of New Materials Institute of Chemistry Chinese Academy of Sciences Beijing, 100080 (China).
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  • Shozo Yanagida

    Corresponding author
    1. Center for Advanced Science and Innovation (CASI) Osaka University/Suita Campus 2-1 Yamada-oka, Suita, Osaka 565-0871 (Japan)
    • Center for Advanced Science and Innovation (CASI) Osaka University/Suita Campus 2-1 Yamada-oka, Suita, Osaka 565-0871 (Japan).
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Abstract

Here, the fabrication of quasi-solid-state TiO2/dye/poly(3-hexylthiophene) (P3HT) solar cells is reported, in which the dyes with oleophilic thienyl groups were employed and ionic liquid (IL), 1-ethyl-3-methylimidazolium (EMIm) containing lithium bis(trifluromethanesulfone)amide (Li-TFSI) and 4-tert-butylpyridine (t-BP) are assembled with dyed TiO2 surfaces. One of the devices gave a high conversion efficiency of up to 2.70% under 1 sun illumination. The excellent performance is ascribed to successful molecular self-organization at interface of the dye molecules and P3HT, and to the efficient charge separation and diffusion acquired by introduction of the IL coupled with Li-TFSI and t-BP.

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