THE INVESTIGATION ON SYNTHESIS AND OPTICAL PROPERTIES OF Ag-DOPED ZnS NANOCRYSTALS BY HYDROTHERMAL METHOD
نویسندگان
چکیده
Ag-doped ZnS nanocrystals were synthesized by hydrothermal method in propanetriol solutions. X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDX), transmission electron microscopy (TEM) and high-resolution transmission electron microscopy (HRTEM) characterizations were used to determine the structure and morphology of ZnS: Ag nanocrystals. The as-prepared nanoparticles are approximately spherical with average size around 20~30nm and have a cubic zinc blended structure. The quantum-confined effect of the Ag-doped ZnS nanocrystals is confirmed by the ultraviolet-visible (UV-vis) spectra. The optical properties of ZnS: Ag nanocrystals were investigated by using photoluminescence (PL) spectra, which showed that the products exhibited good optical properties with maximum emission peak at about 460nm, and the intensity of luminescence increased with the increase of concentration of Ag ions.
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