Volume 5, Issue 4, August 2016, Page: 23-30
Effect of Fluorine Doping on Structural and Optical Properties of SnO2 Thin Films Prepared by Chemical Spray Pyrolysis Method
Nabeel A. Bakr, Department of Physics, College of Science, University of Diyala, Diyala, Iraq
Sabah A. Salman, Department of Physics, College of Science, University of Diyala, Diyala, Iraq
Mohammed N. Ali, Department of Physics, College of Science, University of Diyala, Diyala, Iraq
Received: Jul. 3, 2016;       Accepted: Jul. 13, 2016;       Published: Aug. 17, 2016
DOI: 10.11648/j.am.20160504.12      View  3872      Downloads  164
Abstract
In this study, (SnO2-xFx) thin films where (x = 0, 0.02, 0.04, 0.06 and 0.08) have been deposited by chemical spray pyrolysis method on glass substrates at temperature of (400°C), using Tin Chloride Pentahydrate (SnCl4.5H2O) and Ammonium Fluoride (NH4F) solutions. The structural properties and morphology of these films have been studied using XRD and AFM respectively. XRD analysis showed that these films are polycrystalline in nature with tetragonal Rutile structure with preferred orientation of (110). Doping with Fluorine causes a decrease in the crystallite size. The optical properties for all the films were studied by recording the transmittance and absorbance spectra in the range of (300-900) nm. The results showed that the absorbance increases with increasing the doping percentage. The optical energy gap for allowed direct electronic transition was calculated and it was found that the thin film with 0.08 doping percentage has the least value of 3.72 eV. Urbach energy decreases with increasing doping percentage. The optical constants (absorption coefficient, refractive index, extinction coefficient, real and imaginary parts of dielectric constant) as a function of photon energy for all prepared films were calculated.
Keywords
(SnO2) Thin Films, Fluorine Doping, Chemical Spray Pyrolysis, XRD, Optical Properties
To cite this article
Nabeel A. Bakr, Sabah A. Salman, Mohammed N. Ali, Effect of Fluorine Doping on Structural and Optical Properties of SnO2 Thin Films Prepared by Chemical Spray Pyrolysis Method, Advances in Materials. Vol. 5, No. 4, 2016, pp. 23-30. doi: 10.11648/j.am.20160504.12
Copyright
Copyright © 2016 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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