Electrophoretically deposited TiO2 nanotube light-scattering layers of dye-sensitized solar cells

Keisuke Nakayama, Takaya Kubo, Yoshinori Nishikitani

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

We report herein the enhanced light-to-electricity conversion efficiency of a dye-sensitized solar cell using a new bilayer structure of the TiO 2 electrode. The bilayer structure consists of a light-absorbing TiO2 nanoparticle layer together with a light-scattering TiO 2 nanotube layer formed upon. High aspect-ratio TiO2 nanotubes (α-TNTs) with a diameter of 20 nm were prepared via anodization of a Ti sheet in a perchloric acid solution, and the α-TNT layer was electrophoretically deposited onto the sintered TiO2 nanoparticle layer. The light-scattering property of the α-TNT layer was comparable to that of the commonly used TiO2 sub-micron nanoparticle layer. The α-TNT layer provided a large surface area for dye-adsorption as well as an efficient transport pathway for photo-generated carriers. These effects allowed a higher incident photon-to-current efficiency of the bilayer TiO2 structure with the nanotube light-scattering layer over the whole spectral range relative to that with a sub-micron nanoparticle layer.

Original languageEnglish
Pages (from-to)6610-6614
Number of pages5
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume47
Issue number8 PART 1
DOIs
Publication statusPublished - 2008 Aug 8
Externally publishedYes

Keywords

  • α-TNT
  • Anodization
  • Dye-sensitized solar cell
  • Electrophoretic deposition
  • High aspect-ratio
  • Light-scattering layer
  • Perchloric acid
  • TiO nanotube

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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