Photovoltaic properties of TiO2-ZnO composite electrodes for dye-sensitized solar cells

Junichi Hojo, Hui Tong, Shunsuke Shintani, Miki Inada, Yumi Tanaka, Naoya Enomoto

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Photovoltaic properties of wet-type dye-sensitized solar cells were investigated with emphasis on the structures of two types of TiO2-ZnO composites as photoelectrodes. One was the mixed electrode of TiO2 and ZnO powders. Another was the TiO2-coated ZnO nanorod array prepared by a sol-gel process. The composite films were loaded on a transparent electrode and clacined at 450-500°C, on which dye molecules were adsorbed. The currentvoltage characteristics were measured in iodide electrolyte solution under a simulated solar light. The mixed electrode exhibited a significant decrease in current density and photovoltaic efficiency compared to TiO 2 electrode. Although the photovoltaic efficiency of ZnO was lower than that of TiO2, TiO2coating of ZnO nanorod array improved the photovoltaic properties. The addition of triblockcopolymer as pore former in TiO2 coating was effective to increase the photovoltaic efficiency. The control of the concentration of TiO2 slurry was also important for homogeneous penetration into ZnO nanorod array.

Original languageEnglish
Pages (from-to)621-625
Number of pages5
JournalFuntai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
Volume59
Issue number11
DOIs
Publication statusPublished - Nov 1 2012

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering
  • Industrial and Manufacturing Engineering
  • Metals and Alloys
  • Materials Chemistry

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