Original Paper
Characterisation of Cd1–x–yZnxBeySe crystals by spectroscopic ellipsometry and luminescence
Abstract
Optical and luminescence properties of Cd1–x–yZnxBeySe solid solutions grown in the composition range 0 < x < 0.15 and 0 < y < 0.30 by the high pressure Bridgman method are reported. Spectroscopic ellipsometry was employed for determination of spectral dependence of the complex dielectric function ε(E), refractive index n(E) and absorption coefficient α(E) in the photon energy range 0.75–6.0 eV. The dispersion of the refractive index of the alloys was modelled using a Sellmeier-type relation. The excitonic band-gap energies were estimated from the ellipsometric and photoluminescence measurements. (© 2006 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
