Volume 3, Issue 2, June 2018, Page: 12-22
Effect of Precursor Solvents on the Optical Properties of Copper Oxide Thin Films Deposited Using Spray Pyrolysis for Optoelectronic Applications
Adeniyi Yisau Fasasi, Centre for Energy Research & Development, Obafemi Awolowo University, Ile-Ife, Nigeria; Department of Physics and Applied Mathematics, Osun State University, Osogbo, Nigeria
Edward Osagie, Centre for Energy Research & Development, Obafemi Awolowo University, Ile-Ife, Nigeria; Department of Physics and Engineering Physics, Obafemi Awolowo University, Ile-Ife, Nigeria
David Pelemo, Centre for Energy Research & Development, Obafemi Awolowo University, Ile-Ife, Nigeria
Eusebius Obiajunwa, Centre for Energy Research & Development, Obafemi Awolowo University, Ile-Ife, Nigeria
Emmanuel Ajenifuja, Centre for Energy Research & Development, Obafemi Awolowo University, Ile-Ife, Nigeria; Department of Chemical, Metallurgical and Materials Engineering, Tshwane University of Technology, Pretoria, South Africa
John Ajao, Centre for Energy Research & Development, Obafemi Awolowo University, Ile-Ife, Nigeria
Gabriel Osinkolu, Centre for Energy Research & Development, Obafemi Awolowo University, Ile-Ife, Nigeria
Wasiu Oladotun Makinde, Centre for Energy Research & Development, Obafemi Awolowo University, Ile-Ife, Nigeria
Abiodun Eyitayo Adeoye, Department of Physical Sciences, Technical University, Ibadan, Nigeria
Received: Jun. 12, 2018;       Accepted: Jun. 26, 2018;       Published: Jul. 25, 2018
DOI: 10.11648/j.ajmsp.20180302.12      View  587      Downloads  33
Abstract
Copper oxide thin films were deposited on Pyrex glass substrates by spray pyrolysis using ethanol and distilled water (DW) respectively as solvents. Rutherford backscattering spectroscopy results indicated that films from aqueous are thicker than those of alcoholic solutions. Rutherford backscattering spectroscopic compositional results showed the films to be mainly CuO. Optical transmittance measurement of the films was analyzed to obtain the band gap, Urbach energy, optical conductivity, refractive index and the extinction coefficient which were found to be dependent on the solvent used and strongly influenced by the photon energy. The use of Tauc’s equation for calculating the bandgap indicated possible direct and indirect optical transitions. The refractive index of the films which showed normal dispersion behavior were also analyzed using single oscillator model to determine the dispersion parameters such as the dispersion energy, average oscillator strength and wavelength, zero and high frequency dielectric constant, zero frequency refractive index, optical charge carrier density, mobility and resistivity. All the determined values are higher for ethanol than aqueous samples.
Keywords
Copper Oxide, Bandgap, Refractive Index Dispersion, Dielectric Constants, Carrier Density
To cite this article
Adeniyi Yisau Fasasi, Edward Osagie, David Pelemo, Eusebius Obiajunwa, Emmanuel Ajenifuja, John Ajao, Gabriel Osinkolu, Wasiu Oladotun Makinde, Abiodun Eyitayo Adeoye, Effect of Precursor Solvents on the Optical Properties of Copper Oxide Thin Films Deposited Using Spray Pyrolysis for Optoelectronic Applications, American Journal of Materials Synthesis and Processing. Vol. 3, No. 2, 2018, pp. 12-22. doi: 10.11648/j.ajmsp.20180302.12
Copyright
Copyright © 2018 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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