Effect of substrate temperature on polycrystalline Cd0.9Zn0.1Te thin films studied by Raman scattering spectroscopy

Abstract

Cd0.9Zn0.1Te thin films were prepared by vacuum evaporation onto well-cleaned glass substrates maintained at 300, 373 and 473 K. X-ray diffraction studies revealed that the films have zinc blende structure with preferential (I 11) orientation. Raman peak of the room temperature deposited film appeared at 140.30 cm(-1) and 159.65 cm(-1) were for the transverse optic (TO) and longitudinal optic (LO) phonons respectively. The XRD patterns of the higher substrate temperature deposited films exhibited an improvement in the crystallinity of the films. The Raman peak intensity increases and the FWHM decreases for the films deposited at higher substrate temperature. (C) 2004 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim