EFFECTS OF HEAT TREATMENT ON MORPHOLOGICAL AND OPTICAL PROPERTIES OF ZnS NANOCRYSTALS EMBEDDED IN KBr MATRIX.

Abstract

ZnS nanocrystals were embedded in KBr single crystal matrix using Czochralski growth technique. The X-ray diffraction and optical spectroscopy revealed the incorporation of ZnS nanocrystals. A blue shift of the absorption edge of the obtained samples has been observed indicating the quantum confinement effect. Annealing led to a shift in the absorption edge towards longer wavelengths and an increasing of the emissions intensity. This results shows that KBr is a good matrix-host of ZnS nanocrystals and that the elaborated samples can be used for important technological applications.