Comparison of Pure and Doped TiO2 Thin Films Prepared by Sol-Gel Spin-Coating Method

N. Çiçek Bezira, A. Evcinb, R. Kayalic, M.K. Özenc and G. Balyacia aDepartment of Physics, Faculty of Art and Science, Süleyman Demirel University, 32260 Isparta, Turkey bDepartment of Materials Science and Engineering, Faculty of Engineering, Afyon Kocatepe University, 03200 Afyonkarahisar Turkey cDepartment of Physics, Faculty of Art and Science, Ömer Halisdemir University, 51200 Nigde, Turkey

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In this study, using spin-coating sol-gel method we fabricated TiO2 thin films, doped with different concentrations (1, 2, and 3 mole %) of Ce, Dy, and Eu. Characterization of the prepared samples was performed by means of the X-ray diffraction, scanning electron microscopy, ultraviolet visible absorption, and differential thermal and thermo gravimetric analysis. X-ray diffraction measurements have shown that in Eu and Dy-doped samples crystal structure consists of mixed rutile and the dominant anatase phases, however the Ce doped samples consist of anatase phase only. Scanning electron microscopy images have revealed that while average thin film thickness of the Dy-doped samples decreases with increasing concentration of Dy, the average film thicknesses of samples doped with Ce and Eu increases with increasing concentrations of these dopants. Ultraviolet visible absorption spectroscopy measurements have shown that while absorbances of the samples doped by 1 and 2 mole % of the dopants have nearly similar properties, these properties differ from each other for 3 mole % of the dopants. Finally, differential thermal and thermo gravimetric analyses have shown that the chemical reactions and weight losses of the samples have occurred at the expected temperatures.

DOI: 10.12693/APhysPolA.132.620 PACS numbers: 68.37.-d, 68.55-a,68.60-p,78.20.-e, 81.10.Dn, 71.20.Be