CADMIUM SULFIDE-SELENIDE DOPED GLASSES - SILICATE AND PHOSPHATE-GLASSMATRICES

Zinc-boron-silicate and zinc-gallium-phosphate glasses doped with cadm ium sulfide-selenide with concentrations less than or equal to 1.2 wt% were synthesised, and the behaviour of Cd-S-Se microcrystals in the g lass matrices under annealing was studied. Phosphate matrix showed bet ter flexibility both for doping procedure and for thermal processing t o grow microcrystals. Quantum confinement in II-VI microcrystalline do ped glass samples was demonstrated, absorption spectra and structure o f the spectra of the phosphate glasses gave evidence of high concentra tion and good crystalline quality of microcrystals grown in the matric es. An explanation for the observed changes of shape, dimensional disp ersion and crystalline structure of the microcrystals is proposed. (C) 1997 Elsevier Science B.V.