Influence of Processing Parameters on the Optical Properties of Zinc Oxide Thin Films Grown by Spray Pyrolysis

Rajendra, B V and Bhat, Vinayak and Kekuda, Dhananjaya (2013) Influence of Processing Parameters on the Optical Properties of Zinc Oxide Thin Films Grown by Spray Pyrolysis. International Journal of Emerging Technology and Advanced Engineering, 3 (8). pp. 82-85. ISSN 2250-2459

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Abstract

Zinc Oxide (ZnO) thin films were deposited on the glass substrates using Zinc acetate dehydrate solution through spray pyrolysis method. The films were obtained by spraying 0.05M to 0.2M concentrated solutions by maintaining a constant nozzle to substrate distance and thickness. These films were prepared at different substrate temperatures ranging from 473K to 673K. A comprehensive study was carried out to realize the effect of concentration of precursor solution, substrate temperatures and subsequent annealing on optical properties of the ZnO thin films. It was observed that the optical band gap decreases with increase in the substrate temperature. Decreased band gap energy was also found with increased molarity of the solution. An optical constant such as refractive index and absorption coefficient were determined from transmittance spectrum in the ultraviolet–visible (UV–VIS) regions by Swanepoel envelope method. The enhancement in the crystallinity with increased substrate temperature and solution concentration was confirmed by Urbach energy calculations

Item Type: Article
Subjects: Engineering > MIT Manipal > Physics
Depositing User: MIT Library
Date Deposited: 16 Oct 2013 06:50
Last Modified: 16 Oct 2013 06:50
URI: http://eprints.manipal.edu/id/eprint/137493

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