The Effect of Zinc Acetate Concentration on Optical Properties of ZnS Thin Films by Spectroscopic Ellipsometry Analysis Method
Control Science and Engineering
Volume 3, Issue 1, June 2019, Pages: 6-11
Received: Dec. 3, 2018; Accepted: Dec. 14, 2018; Published: Mar. 28, 2019
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Batool Ahmadi Khanegahi, Department of Physics, Faculty of Science, Urmia, Iran
Hassan Sedghi, Department of Physics, Faculty of Science, Urmia, Iran
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In the present work ZnS thin films with different concentration (0.25, 0.5, 0.75 and 1 M) have been deposited on glass substrates by sol–gel spin coating method using an acidic solution, containing zinc acetate (Zn(CHC3COO) 2.2H2O) and thiourea (CH4N2S) as precursors. The optical properties of ZnS thin films such as refractive index, extinction coefficient, dielectric function and band gap energy of the films were obtained by spectroscopic ellipsometry analyzes method in the wavelength of 300 to 800 nm. Considering the data obtained, it can be deduced that the optical properties of ZnS films is highly influenced by Zn concentration. The extinction coefficients (k) of the films were increase with increasing concentration of zinc acetate. From these results it is found that the energy gap of the ZnS films decreases with increasing concentration of zinc acetate in the range of 3.65-2.75eV.
Spectroscopic Ellipsometry, Zn Concentration, Thin Film, Zinc Sulfide, Optical Properties
To cite this article
Batool Ahmadi Khanegahi, Hassan Sedghi, The Effect of Zinc Acetate Concentration on Optical Properties of ZnS Thin Films by Spectroscopic Ellipsometry Analysis Method, Control Science and Engineering. Vol. 3, No. 1, 2019, pp. 6-11. doi: 10.11648/j.cse.20190301.12
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