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

Tokuhisa Kawawaki, Yukina Takahashi, Tetsu Tatsuma

Research output: Contribution to journalArticle

72 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

Fingerprint

Photocurrents
Gold
photocurrents
Coloring Agents
Dyes
dyes
gold
Nanoparticles
nanoparticles
augmentation
Photovoltaic cells
Metal nanoparticles
Photocatalysts
Energy conversion
energy conversion efficiency
Conversion efficiency
Reaction rates
photovoltaic cells
Particle size
Antennas

All Science Journal Classification (ASJC) codes

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

Cite this

Enhancement of dye-sensitized photocurrents by gold nanoparticles : Effects of plasmon coupling. / Kawawaki, Tokuhisa; Takahashi, Yukina; Tatsuma, Tetsu.

In: Journal of Physical Chemistry C, Vol. 117, No. 11, 21.03.2013, p. 5901-5907.

Research output: Contribution to journalArticle

@article{9ff3668a44904a5b8af634b0ffcc97df,
title = "Enhancement of dye-sensitized photocurrents by gold nanoparticles: Effects of plasmon coupling",
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.",
author = "Tokuhisa Kawawaki and Yukina Takahashi and Tetsu Tatsuma",
year = "2013",
month = "3",
day = "21",
doi = "10.1021/jp3120836",
language = "English",
volume = "117",
pages = "5901--5907",
journal = "Journal of Physical Chemistry C",
issn = "1932-7447",
publisher = "American Chemical Society",
number = "11",

}

TY - JOUR

T1 - Enhancement of dye-sensitized photocurrents by gold nanoparticles

T2 - Effects of plasmon coupling

AU - Kawawaki, Tokuhisa

AU - Takahashi, Yukina

AU - Tatsuma, Tetsu

PY - 2013/3/21

Y1 - 2013/3/21

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=84875408912&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84875408912&partnerID=8YFLogxK

U2 - 10.1021/jp3120836

DO - 10.1021/jp3120836

M3 - Article

AN - SCOPUS:84875408912

VL - 117

SP - 5901

EP - 5907

JO - Journal of Physical Chemistry C

JF - Journal of Physical Chemistry C

SN - 1932-7447

IS - 11

ER -