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Optical Properties of Zinc Oxide (ZnO) Thin Films Prepared by Spray Pyrolysis Method

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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 concentrated solution at a rate of 0.5ml for 10 min and were deposited at different substrate temperatures ranging from 473K to 673K. A comprehensive study was carried out to realize the effect of substrate temperatures and subsequent annealing on optical properties of the ZnO thin films. It was observed that the band gap energy decreases with increases the substrate temperature and annealing. Optical constants such as the refractive index n and extinction coefficient k were determined from transmittance spectrum in the ultravioletvisible (UVVIS) regions by Swanepoel envelope method and crystallinity was confirmed by Urbach tail and atomic force microscope images.

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Periodical:

Advanced Materials Research (Volume 895)

Pages:

226-230

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.895.226

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Online since:

February 2014

Authors:

B.V. Rajendra, Vinayak Bhat, Dhananjaya Kekuda

Keywords:

Optical Property, Spray Pyrolysis, ZnO Thin Film

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© 2014 Trans Tech Publications Ltd. All Rights Reserved

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