Photoluminescence of crystalline ZnTe grown at deviation from thermodynamic equilibrium

Crystalline textured and columnar structures, as well as, ZnTe acicular single crystals were synthesized from the vapor phase and in tellurium melt at deviation of growth conditions from the equilibrium ones. Studies based on low-temperature photoluminescence and X-ray structural analysis have revealed high structural perfection of the obtained specimens, homogeneous distribution of impurities and weak interaction with the crystalline structure defects. It is shown, as well, that occurrence of transitions that are not typical for equilibrium crystals in the spectrum is typical for non-equilibrium growth conditions. Measurements of temperature dependences of luminescence spectra and dependences on excitation level, as well as, different conditions of annealing enabled to make preliminary conclusions about the nature of the mentioned transitions