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Optical properties of chemical bath deposited nickel oxide (NiO) thin films

F. I. EZEMA1,2,* , A. B. C. EKWEALOR1, R. U. OSUJI1

Affiliation

  1. Dept of Physics & Astronomy, University of Nigeria, Nsukka, Enugu State, Nigeria
  2. School of General Studies, Natural Science Unit, University Of Nigeria, Nsukka, Enugu State, Nigeria

Abstract

Thin film of NiO was deposited on glass slide from aqueous solutions of nickel chloride, and ammonia in which ammonia was employed as complexing agents in the presence of hydroxyl solution. The film was studied using XRD and photomicrograph for the structure and spectrophotometers for its optical properties. The optical characterization shows that the band gap of the film is between 2.10 eV and 3.90 eV, while the indirect band gap is between 0.50eV and 3.20eV and thickness that ranged between 0.061 and 0.346μm. The average transmittance of films was found to be between 50% and 91% in the UV-VIS-NIR regions. The films could be effective as coatings for poultry houses..

Keywords

Chemical bath deposition technique, NiO thin films, Poultry house coating.

Submitted at: March 14, 2007
Accepted at: June 15, 2007

Citation

F. I. EZEMA, A. B. C. EKWEALOR, R. U. OSUJI, Optical properties of chemical bath deposited nickel oxide (NiO) thin films, Journal of Optoelectronics and Advanced Materials Vol. 9, Iss. 6, pp. 1898-1903 (2007)