Abstract
ZnSe1-xSxcrystals with a higher content of selenium or sulfur ions adopt, respectively, a wurtzite or sphalerite structure. Luminescent properties of ZnSe1-xSxcrystals are determined by ternary VZnZniOSecomplexes for crystals with a cubic (sphalerite) lattice, and by sulfur vacancies VSfor crystals with a hexagonal (wurtzite) lattice. Light output of ZnSe1-xSxcrystals increases with increasing the sulfur content up tox= 0.3 and reaches the value of light output observed for ‘classic scintillator’ ZnSe(Te). At the same time, the ZnSe1-xSxbulk crystals possess better thermal stability at the same energy of emitted photons (hν~ 2 eV) as compared to that of the ZnSe(Te) crystals.
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