Enhancement of dye-sensitized photocurrents by gold nanoparticles: Effects of plasmon coupling

Tokuhisa Kawawaki, Yukina Takahashi, Tetsu Tatsuma

    研究成果: Contribution to journalArticle査読

    79 被引用数 (Scopus)

    抄録

    Plasmonic metal nanoparticles are known to work as light-harvesting antennae and to enhance photocurrents of photovoltaic cells and reaction rates of photocatalysts. The effects are expected to increase the energy conversion efficiency and to reduce the thickness of a light-absorbing layer and costs for materials. In this work, we examined the plasmonic enhancement of dye-sensitized photocurrents by Au nanoparticle ensembles with different particle densities to study the effects of interparticle plasmon coupling on the photocurrent enhancement. The coupling effects allow enhancement in a longer wavelength region. The optimum particle size for the enhancement by coupled nanoparticles is 100 nm, whereas that for isolated nanoparticles is 40 nm because the plasmon coupling effect is more significant for larger nanoparticles. Theoretical calculations reproduce those results.

    本文言語英語
    ページ(範囲)5901-5907
    ページ数7
    ジャーナルJournal of Physical Chemistry C
    117
    11
    DOI
    出版ステータス出版済み - 3 21 2013

    All Science Journal Classification (ASJC) codes

    • 電子材料、光学材料、および磁性材料
    • エネルギー(全般)
    • 物理化学および理論化学
    • 表面、皮膜および薄膜

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