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

Tokuhisa Kawawaki, Yukina Takahashi, Tetsu Tatsuma

Research output: Contribution to journalArticle

73 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)5901-5907
Number of pages7
JournalJournal of Physical Chemistry C
Volume117
Issue number11
DOIs
Publication statusPublished - Mar 21 2013

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

Fingerprint Dive into the research topics of 'Enhancement of dye-sensitized photocurrents by gold nanoparticles: Effects of plasmon coupling'. Together they form a unique fingerprint.

  • Cite this