Photovoltaic Properties of Glutathione-Protected Gold Clusters Adsorbed on TiO2 Electrodes

Authors

  • Nobuyuki Sakai,

    1. Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505 (Japan)
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  • Tetsu Tatsuma

    Corresponding author
    1. Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505 (Japan)
    2. PRESTO, Japan Science and Technology Agency (JST), 4-1-8 Honcho, Kawaguchi, Saitama 332-0012 (Japan)
    • Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505 (Japan).
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Abstract

original image

Glutathione-protected Au25 as well as Aun (n = 15, 18, 22, 29, 33, 39) clusters adsorbed on TiO2 electrodes exhibit anodic photocurrents and negative shifts of photopotential in response to visible and/or near-infrared light (400 < λ < 900 nm) on the basis of HOMO−LUMO and similar transitions, indicating that the electrodes are applicable to the conversion of light to electricity (see figure).

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