Composition Dependence of Structural and Optical Properties of Cd1-xZnxTe Thick Films Obtained by the Close-Spaced Sublimation

Journal of Alloys and Compounds 2016
Volodymyr Kosyak, Y. V. Znamenshchykov, Aurimas Čerškus, Yu Gnatenko, Līga Orlova, Jana Vecstaudža, Artūrs Medvids, Anatoliy Opanasyuk, Gundars Mežinskis

This paper reports the results of structural, photoluminescence and Raman characterization of thick Cd1-xZnxTe films with different zinc concentration obtained by the close spaced vacuum sublimation method. The analysis of the X-rays patterns allows us to determine the effect of the zinc concentration on crystal quality of the films. It was found that samples with x > 0.10 and x > 0.32 have high crystal quality. However, with increasing of zinc concentration the crystal quality decreases. This result was confirmed by the photoluminescence study. Namely, the significant degradation of optical properties for the samples with high zinc concentration (x > 0.32) was observed. Raman spectroscopy reveals the relation between zinc concentration and vibrational properties of the films. Also, the micro-Raman method shows that obtained films are uniform and free of tellurium inclusions.

Keywords
Crystal structure | Lattice defects | Photoluminescence | Raman spectroscopy | Semiconducting ternary compounds | X-ray diffraction
DOI
10.1016/j.jallcom.2016.05.065
Hyperlink
http://www.sciencedirect.com/science/article/pii/S0925838816313913

Kosyak, V., Znamenshchykov, Y., Čerškus, A., Gnatenko, Y., Grase, L., Vecstaudža, J., Medvids, A., Opanasyuk, A., Mežinskis, G. Composition Dependence of Structural and Optical Properties of Cd1-xZnxTe Thick Films Obtained by the Close-Spaced Sublimation. Journal of Alloys and Compounds, 2016, Vol.682, pp.543-551. ISSN 0925-8388. Available from: doi:10.1016/j.jallcom.2016.05.065

Publication language
English (en)