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arXiv · 2103.03521

Preparation and characterization of Fe-incorporated TiO$_2$ thin films: A study of optical constants and dispersion energy parameters

Tapash Chandra Paul·Jiban Podder·Lincoln Paik
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Abstract

In this study, we have delineated the preparation and influence of Fe doping on microstructural and optical properties of the pristine and Fe incorporated TiO$_2$ thin film with different Fe concentrations (0, 2, 4, 6, and 8 at.% ). The samples are prepared by easier and cost-saving way of spray pyrolysis technique (SPT) using Ti(OCH$_2$CH$_2$CH$_2$CH$_3$)$_4$ as a precursor of mother material. The effect of Fe in the microstructure and phase formation of TiO$_2$ thin films is investigated by XRD analysis. XRD investigation depicts that the pristine product corresponds to anatase phase of TiO$_2$ and remains uncontaminated with addition of 2 at.% Fe impurity. It is also observed that Fe introduces a phase transition from anatase to rutile after adulterating more Fe contents (4, 6 and 8 at.%). In order to study optical characteristics, UVvis spectroscopy has been employed which revels that UV absorption for the Fe incorporated TiO$_2$ products are noticed to move to a longer wavelength (red shift) and Fe contents lessen bandgap energy from 3.81eV (0 at.% Fe) to 3.70 eV (8 at.% Fe) of the TiO$_2$ thin films. The impact of Fe on the optical constants such as refractive index, complex dielectric constants, $\tan\delta$, VELF and SELF, dispersion parameters of obtained titanium dioxide samples has been studied. The results display that Fe influences the structural and optical characteristics significantly.

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Tapash Chandra Paul, Jiban Podder, Lincoln Paik. 2021-03-05. Preparation and characterization of Fe-incorporated TiO$_2$ thin films: A study of optical constants and dispersion energy parameters. https://arxiv.org/abs/2103.03521

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