RAMAN SPECTROSCOPY AND LOW TEMPERATURE PHOTOLUMINESCENCE ZnSe_xTe_(1-x) TERNARY ALLOYS

摘要

We investigated Low-Temperature Photoluminescence (PL) spectra of ZnSexTe1-x were grown from the melt where 0≤x≤0.202, the spectra of ZnSe_xTe_(1-x) showing a broad band which may be attributed to self activated emission. The broad self activated (SA) emission band have been assigned to various crystalline defects, such as dislocations and vacancies or their combination with impurities, The phonon properties of ZnSe_xTe_(1-x) alloys grown from the melt have been studied by Raman scattering. ZnSeTe like longitudinal optical phonon modes and ZnSeTe like transverse optical phonon mode were observed in the room temperature Raman Spectra. The Raman scattering in ZnSe_xTe_(1-x) ternary alloys exhibit one mode behavior.