Spectroscopic ellipsometry and photoluminescence investigation of Zn1-x-yBexMgySe and Cd1-x-yBexZnySe crystals

Optical and luminescence properties of the Bridgman-grown Cd 1– x – y Be x Zn y Se and Zn 1– x – y Be x Mg y Se crystals are reported. Spectroscopic ellipsometry was employed for determination of spectral dependence of the complex dielectric function ( E ) in the photon energy range 0.75–6.5 eV. Bel...

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Published in:Physica status solidi. A, Applications and materials science Applications and materials science, 2008-04, Vol.205 (4), p.854-858
Main Authors: WRONKOWSKA, A. A, SKOWRONSKI, L, WRONKOWSKI, A, FIRSZT, F, MECZYNSKA, H, LEGOWSKI, S, STRZAŁKOWSKI, K, ARWIN, H
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
NATURAL SCIENCES
NATURVETENSKAP
Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation
Other solid inorganic materials
Photoluminescence
Physics
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Summary:Optical and luminescence properties of the Bridgman-grown Cd 1– x – y Be x Zn y Se and Zn 1– x – y Be x Mg y Se crystals are reported. Spectroscopic ellipsometry was employed for determination of spectral dependence of the complex dielectric function ( E ) in the photon energy range 0.75–6.5 eV. Below the absorption edge the refractive indices n ( E ) of the alloys were modelled using a Sellmeier-type relation. The excitonic band-gap energies were estimated from the ellipsometric and photoluminescence measurements. Compositional effects in the ellipsometric and photoluminescence spectra are discussed.
ISSN:1862-6300
1862-6319
1862-6319
DOI:10.1002/pssa.200777775