Electric properties and surface structure of TiO 2 for solar cells

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15 Citations (Scopus)


In this paper the electric properties of Titanium dioxide (TiO 2) thin film, which is one of most basic functional materials, were studied for the purpose of solar cell applications. As an initial step, it describes the preparation of thin films of TiO 2 by the sol-gel dip-coating technique on ITO conducting glass substrates. It then discusses the fabrication of the Al/TiO 2/ITO device and the characterization of direct current (DC) electrical properties of TiO 2 thin films. The current-voltage I (V) properties of TiO 2 were measured under different temperatures from 80 to 400 K, using a digital Keithley 6571A electrometer. The I (V) characteristics appeared to be ohmic at low voltage and the space charge was limited (SCL) at higher voltage. The activation energy (E a) of TiO 2 was also calculated to yield two values, depending on the temperature regime. As the particle increased in size, the conductivity increased while the grain boundary effect was reduced. The results show that the film was the conductor. The surface structure of TiO 2 was studied to reveal the film's uniformity and nanoparticles.

Original languageEnglish
Pages (from-to)6-10
Number of pages5
Issue number1
Publication statusPublished - Mar 2012
Externally publishedYes



  • Electric and surface properties
  • Sol-gel
  • TiO

ASJC Scopus subject areas

  • Energy(all)
  • Pollution

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