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

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 0.346 mu m. 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.