Electropolymerized polythiophene photoelectrodes with density-controlled gold nanoparticles

Yukina Takahashi, Sakiko Taura, Tsuyoshi Akiyama, Sunao Yamada

    Research output: Contribution to journalArticlepeer-review

    32 Citations (Scopus)

    Abstract

    A polythiophene thin film was fabricated on gold nanoparticle (AuNP)-deposited indium-tin-oxide (ITO) electrodes with electropolymerization, whereas AuNPs were predeposited on the ITO surface. A photocurrent via photoexcited polythiophene increased with AuNPs which was attributed to the localized surface plasmon resonance. Investigation of the AuNP-density dependence on the relative enhancement of photocurrent revealed the maximum effect at 14% of AuNP-density, while 68% of AuNP-density exhibited smaller photocurrent than the polythiophene electrode without AuNPs. We have revealed that the effects of AuNPs saturate in the fairly low density region, and that the excess AuNPs even in the range of submonolayer resulted in the decrement of photocurrents.

    Original languageEnglish
    Pages (from-to)9155-9160
    Number of pages6
    JournalLangmuir
    Volume28
    Issue number24
    DOIs
    Publication statusPublished - Jun 19 2012

    All Science Journal Classification (ASJC) codes

    • Materials Science(all)
    • Condensed Matter Physics
    • Surfaces and Interfaces
    • Spectroscopy
    • Electrochemistry

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