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Spectroscopic ellipsometry and photoluminescence investigation of Zn 1– x – y Be x Mg y Se and Cd 1– x – y Be x Zn y Se crystals
Author(s) -
Wronkowska A. A.,
Skowroński Ł.,
Wronkowski A.,
Firszt F.,
Me¸czyńska H.,
Łe¸gowski S.,
Strzałkowski K.,
Arwin H.
Publication year - 2008
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200777775
Subject(s) - photoluminescence , ellipsometry , absorption edge , luminescence , analytical chemistry (journal) , photon energy , materials science , band gap , absorption (acoustics) , dielectric function , dielectric , refractive index , spectral line , optics , chemistry , thin film , optoelectronics , photon , physics , nanotechnology , chromatography , astronomy , composite material
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 $ \tilde \epsilon $ ( 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. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)