Structural and Optical Characterization of TiO_2 Thin Films Prepared by Sol-Gel Process

• Authors: I. Karabay , S. Aydın Yüksel , F. Ongül , S. Öztürk , M. Aslı
• Languages of publication: EN

Abstracts

EN

Titanium dioxide (TiO_2) thin films were prepared by spin coating technique of sol precursor on Corning 7059 glass substrates. Spectral transmittances of as deposited and annealed samples were measured in the range of 250 to 1100 nm. Optical band gaps were calculated from the Tauc plots and was found to be about 3.78 eV for the annealed samples at 500°C. X-ray diffraction patterns were performed with as deposited and annealed samples. By annealing the samples at 500C in various annealing times, the structure has changed from amorphous to the anatase crystalline state. Variations of the band gap energy values of TiO_2 films with cobalt doping were also investigated. Cobalt doping decreased the band gap value of TiO_2 films down to 3.25 eV. X-ray diffraction patterns were also given for the doped samples.

Keywords

EN

78.20.-e; 81.20.Fw; 61.05.cp

Discipline

• 61.05.cp: X-ray diffraction
• 81.20.Fw: Sol-gel processing, precipitation(for reactions in sol-gels, see 82.33.Ln; for sol-gels as disperse system, see 82.70.Gg)
• 78.20.-e: Optical properties of bulk materials and thin films(for optical properties related to materials treatment, see 81.40.Tv; for optical materials, see 42.70-a; for optical properties of superconductors, see 74.25.Gz; for optical properties of rocks and minerals, see 91.60.Mk; for optical properties of specific thin films, see 78.66.-w)

• Journal: Acta Physica Polonica A
• Year: 2012
• Volume: 121
• Issue: 1
• Pages: 265-267

Dates

published

2012-01

Contributors

author

I. Karabay

• Department of Physics, Yıldız Technical University, İstanbul, Turkey

author

S. Aydın Yüksel

• Department of Physics, Yıldız Technical University, İstanbul, Turkey

author

F. Ongül

• Department of Physics, Yıldız Technical University, İstanbul, Turkey

author

S. Öztürk

• Department of Physics, Yıldız Technical University, İstanbul, Turkey

author

M. Aslı

• Department of Physics, Yıldız Technical University, İstanbul, Turkey

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Identifiers

DOI

10.12693/APhysPolA.121.265