Electropolymerized polythiophene photoelectrodes with density-controlled gold nanoparticles

Yukina Takahashi, Sakiko Taura, Tsuyoshi Akiyama, Sunao Yamada

Research output: Contribution to journalArticle

31 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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