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Article Information:
Effects of Thermal Annealing on the Optical Properties of Titanium Oxide Thin Films Prepared by Chemical Bath Deposition Technique
H.U. Igwe, O.E. Ekpe and E.I. Ugwu
Corresponding Author: H.U. Igwe
Submitted: 2009 December, 15
Accepted: 2010 January, 02
Published: 2010 August, 01 |
Abstract:
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A titanium oxide thin film was prepared by chemical bath deposition technique, deposited on glass
substrates using TiO2 and NaOH solution with triethanolamine (TEA) as the complexing agent. The films w ere
subjected to post deposition annealing under various temperatures, 100, 150, 200, 300 and 399ºC. The thermal
treatment streamlined the properties of the oxide films. The films are transparent in the entire regions of the
electromagnetic spectrum, firmly adhered to the substrate and resistant to chemicals. The transmittance is
between 20 and 95% while the reflectance is between 0.95 and 1%. The band gaps obtained under various
thermal treatments are between 2.50 and 3.0 ev. The refractive index is between 1.52 and 2.55. The thickness
achieved is in the range of 0.12-0.14 :m.These properties of the oxide film make it suitable for application in
solar cells: Liquid and solid dye-sensitized photoelectrochemical solar cells, photo induced water splitting, dye
synthesized solar cells, environmental purifications, gas sensors, display devices, batteries, as well as, solar
cells with an organic or inorganic extremely thin absorber. These thin films are also of interest for the photooxidation
of water, photocatalysis, electro chromic devices and other uses.
Key words: Complexing agent, chemical bath deposition, optical properties, thermal annealing, thin film, titanium oxide,
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Cite this Reference:
H.U. Igwe, O.E. Ekpe and E.I. Ugwu, . Effects of Thermal Annealing on the Optical Properties of Titanium Oxide Thin Films Prepared by Chemical Bath Deposition Technique. Research Journal of Applied Sciences, Engineering and Technology, (5): Page No: 447-451.
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ISSN (Online): 2040-7467
ISSN (Print): 2040-7459 |
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