Plasmon-enhanced photocurrent in quasi-solid-state dye-sensitized solar cells by the inclusion of gold/silica core-shell nanoparticles in a TiO 2 photoanode

Sanghyuk Wooh, Yong Gun Lee, Muhammad Nawaz Tahir, Donghoon Song, Michael Meister, Frederic Laquai, Wolfgang Tremel, Juan Bisquert, Yong Soo Kang*, Kookheon Char

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

23 Scopus citations

Abstract

Direct evidence of the effects of the localized surface plasmon resonance (LSPR) of gold nanoparticles (Au NPs) in TiO2 photoanodes on the performance enhancement in quasi-solid-state dye-sensitized solar cells (DSCs) is reported by comparing gold/silica core-shell nanoparticles (Au@SiO 2 NPs) and hollow silica nanoparticles with the same shell size of the core-shell nanoparticles. The Au nanoparticles were shelled by a thin SiO2 layer to produce the core-shell structure, and the SiO 2 hollow spheres were made by dissolving the Au cores of the gold/silica core-shell nanoparticles. Therefore, the size and morphology of the SiO2 hollow spheres were the same as the Au@SiO2 NPs. The energy conversion efficiency was improved nearly 36% upon incorporating the Au nanoparticles, mostly due to the increase in Jsc, while V oc and FF were unchanged. The improvement was mostly contributed by the LSPR of the Au@SiO2 NPs, whereas the other parameters, such as the electron lifetime and electron diffusion coefficient, were nearly unchanged. Therefore, LSPR is an effective tool in improving the photocurrent and consequently the performance of DSCs.

Original languageEnglish (US)
Pages (from-to)12627-12634
Number of pages8
JournalJournal of Materials Chemistry A
Volume1
Issue number40
DOIs
StatePublished - Oct 28 2013

ASJC Scopus subject areas

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

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