Indian Journal of Public Health Research & Development
Year : 2018, Volume : 9, Issue : 12
First page : ( 937) Last page : ( 942)
Print ISSN : 0976-0245. Online ISSN : 0976-5506.
Article DOI : 10.5958/0976-5506.2018.01969.1

Seed Layer Thickness Effect on the Structural and Optical Characterization of TiO₂ Nanostructure Thin Film

Alkhayatt Adel H. Omran^1,*, Hussein Hussein Ahmed¹

¹Faculty of sciences, University of kufa, Iraq

*Corresponding author: Adel H. Omran Alkhayatt. University of kufa Faculty of sciences, Iraq

Online published on 2 February, 2019.

Abstract

In this research Titanium dioxide (TiO₂) nanostructure thin flms have been prepared by chemical bath deposition method on a deferent thickness of seed layer (1, 2 and 3)layers which deposited by sol-gel spin coating technique. Structural and optical characteristics were investigated as a function of the seed layer thickness using x-ray diffraction and UV-Vis spectrophotometer. The results showed that the TiO₂ thin flms have a polycrystalline structure in nature with anatase phase and tetragonal crystal structure. The dislocation density, the number of crystallite and the strain of the prepared flms were also investigated. The optical properties results showed that the thin flm transmittance decrease with increasing the thickness of the seed layers, where the transmittance highest value was in the visible region about 53% at wave length 531 nm. The increasing of number of seed layers that lead to increase the thickness of the seed layer and the thin flm which leads to increase the flms absorbance. The energy band gap of allowed direct transition was decreased with the increase of the number of seed layers (thickness) from 3.378 eV to 3.067 eV with increase the thickness from 105.7nm to 156.6 nm for one layer and three layers respectively.

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Keywords

Nanostructure TiO₂, Thin ilms, CBD, Sol-Gel spin coating, band gap.

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