Dye-sensitized TiO2 nanotube solar cells: Fabrication and electronic characterization

Yoshinori Ohsaki, Naruhiko Masaki, Takayuki Kitamura, Yuji Wada, Takumi Okamoto, Toru Sekino, Kohichi Niihara, Shozo Yanagida

Research output: Contribution to journalArticlepeer-review

289 Citations (Scopus)


TiO2 nanotubes (TNTs) with large aspect ratio and large specific surface area were prepared from P25 (Nippon Aerosil) and applied to dye-sensitized titanium dioxide solar cells (DSSCs). Optimization of fabrication conditions, i.e., pH of the starting paste, sintering temperature for the TiO2 electrodes, electrolyte compositions of DSSCs gave the high conversion efficiency with improved open circuit voltage (Voc) and fill factor (FF) when compared to DSSCs made of P25. The evaluation of dye adsorption and the photo-injected electron transport such as electron diffusion coefficient (D) and electron lifetime (τ) in TNTs electrodes revealed that the higher efficiency resulted from increase of electron density with keeping much longer τ in TNTs electrodes than in P25 electrodes.

Original languageEnglish
Pages (from-to)4157-4163
Number of pages7
JournalPhysical Chemistry Chemical Physics
Issue number24
Publication statusPublished - 2005 Dec 21
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry


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