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Properties of TiO2 thin film coated on SnO2 thin films by sol-gel method

  • Journal of the Korean Crystal Growth and Crystal Technology
  • Abbr : J. Korean Cryst. Growth Cryst. Technol.
  • 2009, 19(5), pp.256-261
  • Publisher : The Korea Association Of Crystal Growth, Inc.
  • Research Area : Engineering > Materials Science and Engineering

Tae-Young Lim 1 Jinho Kim 1 Jonghee Hwang 1 조혜미 2 황혜진 2

1한국세라믹기술원
2인하대학교

Accredited

ABSTRACT

Hydrophilic and transparent TiO2 thin film was fabricated by sol-gel method and the properties of contact angle, surface morphology, and transmittance were measured. In addition, surfactant Tween 80 was used for increasing the hydrophilic property of thin film. When the contents of Tween 80 in TiO2 solution was 0, 10, 30, 50 wt%, the contact angles of TiO2 thin film were 41.4 o , 18.2 o , 16.0 o , 13.2 o , respectively. Fabricated TiO2 thin film showed the photocatalytic property that decomposed methylene blue and decreased the absorbance of solution after UV irradiation. TiO2 thin films fabricated with the solution of 30 wt% Tween 80 were deposited on glass (bare), antimony tin oxide (ATO), fluorine tin oxide (FTO), indium tin oxide (ITO) coated glass substrates, and the contact angle and transmittance of thin film was measured. The contact angles of thin films deposited on four substrates were 16.2~27.1 o and was decreased to the range of 13.2~17.6 o after UV irradiation. Especially, the thin films coated on ATO and FTO glass substrate showed high transmittance of 74.6 % and 76.8 % in visible range, respectively, and low transmittance of 54.2 % and 40.4 % in infrared range, respectively.

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