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http://dx.doi.org/10.5012/jkcs.2022.66.5.341

Surface Characterization of Zinc Selenide Thin Films Obtained by RF co-sputtering  

Lee, Seokhee (Department of Chemistry, Pukyong National University)
Kang, Jisoo (Department of Chemistry, Brown University)
Park, Juyun (Department of Chemistry, Pukyong National University)
Kang, Yong-Cheol (Department of Chemistry, Pukyong National University)
Publication Information
Journal of the Korean Chemical Society / v.66, no.5, 2022 , pp. 341-348 More about this Journal
Abstract
In this work, radio frequency magnetron sputtering was used to deposit zinc selenide thin films on p-type silicon (100) wafers and glass substrates in a high vacuum chamber. Several surface characterization instruments were implemented to study the thin films. X-ray photoelectron spectroscopy results revealed that oxidized Zn bound to Se (Zn-Se) at 1022.7 ± 0.1 eV becomes the dominant oxidized species when Se concentration exceeds 70%. Scanning electron microscopy coupled with energy dispersive spectroscopy showed that incorporating Se in Zn thin films will lead to formation of ZnSe grains on the surface. Contact angle measurements indicated that ZnSe-60 exhibited the lowest total surface free energy value of 24.94 mN/m. Lastly, ultraviolet-visible spectrophotometry and ultraviolet photoelectron spectroscopy data evinced that the energy band gap gradually increases with increasing Se concentration with ZnSe-70 having the highest work function value of 4.91 eV.
Keywords
Zinc Selenide; Thin films; RF co-sputtering; XPS;
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