Correlation between dispersion properties of TiO2 colloidal sols and photoelectric characteristics of TiO2 films.

  • Jung H
  • Lee S
  • Kim J
 et al. 
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Abstract

TiO2 film for use as dye-sensitized solar cell was prepared using the TiO2 colloidal sols (unpeptized sol and peptized sol). The optical properties and photocurrent-voltage characteristics of the resultant films were investigated. The optical transmittance of TiO2 thin film prepared from the peptized colloidal sol was over 90%, while that of TiO2 film from the unpeptized sol was under 80%. The TiO2 photoelectrode prepared from the peptized colloidal sol showed low photoelectric conversion efficiency (eta), 1.30%, whereas the efficiency of photoelectrode from the unpeptized sol was 2.21%. The high optical transmittance and low conversion efficiency of TiO2 film from the peptized sol are discussed in terms of dense microstructure due to the drying nature of well-dispersed colloidal sol.

Author-supplied keywords

  • Colloids
  • Colloids: chemistry
  • Electrodes
  • Membranes, Artificial
  • Photochemistry
  • Spectrophotometry
  • Spectroscopy, Fourier Transform Infrared
  • Surface Properties
  • Time Factors
  • Titanium
  • Titanium: chemistry
  • X-Ray Diffraction

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Authors

  • Hyun Suk Jung

  • Sang-Wook Lee

  • Jin Young Kim

  • Kug Sun Hong

  • Young Cheol Lee

  • Kyung Hyun Ko

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