Fabrication of porous TiO2 films using a spongy replica prepared by layer-by-layer self-assembly method

Application to dye-sensitized solar cells

Yosuke Tsuge, Kohei Inokuchi, Katsuhiro Onozuka, Ohno Shingo, Shinichiro Sugi, Masato Yoshikawa, Seimei Shiratori

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

In this study, we report the fabrication of the anatase TiO2 films with high porosity using a new spongy replica which prepared by layer-by-layer self-assembly technique. The scanning electron microscope photographs revealed that the spongy replica has an extremely porous microstructure and high surface area. Moreover, this porous replica was easily fabricated from a very flat film through the action with silver acetate solution. This method facilitated the porous TiO2 films with a high surface area. Additionally, by this method, a necking between the TiO 2 films was strong and the amount of loaded dye was increased, so that the increase of forward electron transfer between the TiO2 films on the surface and the TiO2 films on the substrate. By using the fabricated porous TiO2 films as the photoelectrode for dye-sensitized solar cell, the improvement of the photocurrent-voltage characteristic was achieved, resulting in an energy conversion efficiency of Eff = 2.66% with the thickness of approximately 5 μm.

Original languageEnglish
Pages (from-to)396-401
Number of pages6
JournalThin Solid Films
Volume499
Issue number1-2
DOIs
Publication statusPublished - 2006 Mar 21

Fingerprint

replicas
Self assembly
self assembly
solar cells
dyes
Fabrication
fabrication
energy conversion efficiency
Dye-sensitized solar cells
photographs
Photocurrents
Energy conversion
anatase
Titanium dioxide
Conversion efficiency
photocurrents
acetates
electron transfer
Silver
Coloring Agents

Keywords

  • Dye-sensitized solar cell
  • Layer-by-layer (LBL) self-assembly
  • Spongy replica
  • TiO

ASJC Scopus subject areas

  • Surfaces, Coatings and Films
  • Condensed Matter Physics
  • Surfaces and Interfaces

Cite this

Fabrication of porous TiO2 films using a spongy replica prepared by layer-by-layer self-assembly method : Application to dye-sensitized solar cells. / Tsuge, Yosuke; Inokuchi, Kohei; Onozuka, Katsuhiro; Shingo, Ohno; Sugi, Shinichiro; Yoshikawa, Masato; Shiratori, Seimei.

In: Thin Solid Films, Vol. 499, No. 1-2, 21.03.2006, p. 396-401.

Research output: Contribution to journalArticle

Tsuge, Yosuke ; Inokuchi, Kohei ; Onozuka, Katsuhiro ; Shingo, Ohno ; Sugi, Shinichiro ; Yoshikawa, Masato ; Shiratori, Seimei. / Fabrication of porous TiO2 films using a spongy replica prepared by layer-by-layer self-assembly method : Application to dye-sensitized solar cells. In: Thin Solid Films. 2006 ; Vol. 499, No. 1-2. pp. 396-401.
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