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Synthesis, Structural and Optical Characterization of Copper and Rare Earth doped CdS Nanoparticles.

Cadmium sulphide (CdS) nanoparticles doped with Cu(2+) and co-doped with rare earth metallic ions (RE3(+)) have been synthesized by co-precipitation method. The synthesized nanoparticles were been characterized by powder X-ray diffraction studies (PXRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), particle size by dynamic light scattering (DLS), UV-visible spectroscopy (UV), and photoluminescence (PL) studies. It is observed that CdS nanoparticles can be co-doped with copper and rare earth metallic ions without altering XRD pattern as indicated by X-ray diffraction results. SEM results show that synthesized particles show spherical aggregation and TEM results show that these particles assembled to give a flower-like morphology. Absorption spectra of all the samples show strong blue shift from bulk CdS. Interesting luminescence pattern with enhanced intensity has been observed for co-doped CdS nanoparticles at room temperature.