Journal
THIN SOLID FILMS
Volume 519, Issue 9, Pages 2843-2846Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.tsf.2010.12.172
Keywords
ZnTe nanocrystals; ZnS nanocrystals; Ellipsometry; Dielectric function; Critical Points; Tauc-Lorentz
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The optical properties of ZnTe and ZnS nanocrystals (ZnTe-NC and ZnS-NC) were determined by Spectroscopic Ellipsometry. The nanocrystals were embedded in a SiO2 matrix by ion implantation technique. Their sizes were characterized by transmission electron microscopy. The ZnTe-NC and ZnS-NC were modelled using Critical Points (CPs) dispersion formulas developed by Adachi. Besides the CPs model, the Tauc-Lorentz model was found to be another choice to get a good spectral fitting. Here we demonstrated that these models yield reasonable values of optical constants of II-VI nanocrystals. The best agreement was found with the experimental data over the entire range of 0.6 to 6.5 eV. (C) 2010 Elsevier B.V. All rights reserved.
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