Influence of Annealed Temperature on Optical Properties of Nanostructured CdO Thin Films
American Journal of Optics and Photonics
Volume 5, Issue 2, April 2017, Pages: 19-23
Received: Nov. 19, 2016; Accepted: Jan. 12, 2017; Published: Oct. 13, 2017
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Author
Pradip Kumar Ghosh, Department of Physics, Abhedananda Mahavidyalaya, Sainthia, Birbhum, West Bengal, India
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Abstract
Nanostructures of cadmium oxide (CdO) thin films were deposited by sol-gel dip coating technique on glass and Si substrates. X-ray diffraction patterns and selected area electron diffraction patterns confirmed the nanocrystalline cubic CdO phase formation. Transmission Electron Micrograph (TEM) of the film revealed the manifestation of nano CdO phase with average particle size lies in the range 1.6 nm to 9.3 nm. From the measurements of transmittance spectra of the films the direct allowed bandgap values have been calculated and they lie in the range 2.85 eV to 3.69 eV with high transparency (~ 75% in the wavelength range 500 - 800 nm) of the film. Particle size have also been calculated from the shift of bandgap from that of bulk value for those films for which the particles are compearable to Bohr exitonic radius.
Keywords
CdO Thin Films, Sol-gel, TEM, XRD, Optical Properties
To cite this article
Pradip Kumar Ghosh, Influence of Annealed Temperature on Optical Properties of Nanostructured CdO Thin Films, American Journal of Optics and Photonics. Vol. 5, No. 2, 2017, pp. 19-23. doi: 10.11648/j.ajop.20170502.12
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Copyright © 2017 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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