Ellipsometric study of optical properties of GaS<sub>x</sub>Se<sub>1-x</sub> layered mixed crystals
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Date
2016
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Elsevier Science Bv
Abstract
Spectroscopic ellipsometry measurements were performed on GaSxSe1-x mixed crystals (0 <= x <= 1) in the 1.2-6.2 eV range. Spectral dependence of optical parameters; real and imaginary components of pseudodielectric function, pseudorefractive index and pseudoextinction coefficient were reported in the present work. Critical point (CP) analyses on second-energy derivative spectra of the pseudodielectric function were accomplished to find the interband transition energies. The revealed energy values were associated with each other taking into account the fact that band gap energy of mixed crystals rises with increase in sulfur content. The variation of CP energies with composition (x) was also plotted. Peaks in the spectra of studied optical parameters and CP energy values were observed to be shifted to higher energy values as sulfur concentration is increased in the mixed crystals. (C) 2016 Elsevier B.V. All rights reserved.
Description
Gasanly, Nizami/0000-0002-3199-6686; Gasanly, Nizami/0000-0002-3199-6686
Keywords
Semiconductors, Ellipsometry, Optical parameters
Turkish CoHE Thesis Center URL
Citation
10
WoS Q
Q2
Scopus Q
Source
Volume
54
Issue
Start Page
155
End Page
159