Optical and luminescence properties of Cd0.925Be0.075Se crystal grown by the modified Bridgman method are reported. Ellipsometric spectra were measured in the photon energy range 0.75–6.5 eV for a high symmetry orientation of the optic axis (c axis) being perpendicular to the air–substrate interface. The structure in the complex dielectric function was identified as E0(A), E0(C), E1(A), E1(B), E1(C), and E2 threshold energies. A large bowing of the main energy gap was estimated. Luminescence spectra were measured in the temperature range from 38 K to room temperature. Exciton emission at room temperature has a maximum at 1.873 eV. (© 2004 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
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Wronkowska et al. (2004) studied this question.