Influence of Film Thickness and Annealing Temperature on Optical Properties of Nanostructured-TiO2 Thin Films Prepared by Sol-Gel Spin Coating Technique

被引：3
|
作者：
Darwish A.A.A. [1 ,2 ]
Abu-Samaha F.S. [3 ,4 ]
Mohamed Z. [5 ]
El-Nahass M.M. [6 ]
机构：
[1] Nanotechnology Research Laboratory, Faculty of Science, University of Tabuk, Tabuk
[2] Department of Physics, Faculty of Education at Al-Mahweet, Sana'a University, Al-Mahweet
[3] Department of Physics, Faculty of Science and Arts, Bisha University, Bisha
[4] Department of Physics and Mathematical Engineering, Faculty of Engineering, Port-Said University, Port-Said
[5] Department of Physics, Faculty of Science, Port-Said University, Port-Said
[6] Department of Physics, Faculty of Education, Ain Shams University, Rorxy, Cairo
来源：
International Journal of Nanoscience | 2017年 / 16卷 / 02期
关键词：
crystal structure; Oxides; sol-gel chemistry; surface properties; thin films; transmission electron microscopy;
D O I：
10.1142/S0219581X16500289
中图分类号：
学科分类号：
摘要：
TiO2 powder was found to be polycrystalline with rutile system. TiO2 films were deposited on quartz substrates by a sol-gel spin coating technique. X-ray diffraction and transmission electron microscope results have confirmed that the TiO2 films have nanostructure nature. It is found the crystallite size increased with annealing temperature. The optical constants of nanostructured TiO2 films were found to be independent of film thickness in the range from 100nm to 500nm. It is found that the optical constants and the dielectric constant of the thin films were all affected by annealing temperature. The existing allowed optical transitions in the as-deposited and annealed films were found to be direct and indirect transitions. Finally, the bandgaps of the as-deposited film were found to decrease with the annealing temperature. © 2017 World Scientific Publishing Company.
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