International Journal of
Physical Sciences

  • Abbreviation: Int. J. Phys. Sci.
  • Language: English
  • ISSN: 1992-1950
  • DOI: 10.5897/IJPS
  • Start Year: 2006
  • Published Articles: 2533

Full Length Research Paper

Synthesis, structural and optical characterizations of cadmium oxide (CdO) thin films by chemical bath deposition (CBD) technique

B. A. Ezekoye1*, V. A. Ezekoye1, P. O. Offor2 and S. C. Utazi1
1Crystal Growth and Characterization Laboratory, Department of Physics and Astronomy, University of Nigeria, Nsukka, Enugu State, Nigeria. 2Department of Metallurgical and Materials Engineering, University of Nigeria, Nsukka, Enugu State, Nigeria.
Email: [email protected]

  •  Accepted: 15 August 2013
  •  Published: 23 August 2013

Abstract

Thin films of cadmium oxide (CdO) were synthesized and characterized using chemical bath deposition (CBD) technique. The XRD studies revealed amorphous CdO thin films which upon annealing at 623K transformed to polycrystalline structure. The optical studies showed that the CdO films have high average transmittance over 60% in the visible region and direct optical bandgaps of 2.02 ± 0.05 eV, 2.03 ± 0.05eV and 2.05 ± 0.05eV for samples X, Y, Z respectively. These characteristics make them good candidates for applications in photodiodes, phototransistors, photovoltaics, transparent electrodes, liquid crystal displays, IR detectors and anti-reflection coatings.

 

Key words: Thin films, chemical bath method, cadmium oxide, characterizations, bandgap.