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Abstract For the past few years, the prepration and characterization of nanocrystals of materials have become an interesting area in the research activity. CdS (Cadmium Sulphide) is a well known semi conducting material which finds applications in optical devices. In the present study, we have made an attempt to investigate the effect of Pb2+ as impurity on the properties of CdS nanocrystals. The samples were prepared by using simple domestic microwave assisted solvothermal method with ethylene glycol as solvant. The samples prepared were annealed to have good ordering. X-ray diffraction measurements were carried out for all the smples. The grain size, lattice parameter and yield were determined. The colour before and after annealing was noted. EDX and SEM analyses were also done. The prepared samples were electrically characterized by making dielectric measurements on the prepared pellets. The present study indicates that the polarization mechanism in the nano crystals considered is mainly contributed by the space charge polarization. Keywords: Semiconducting II –IV materieals, Cadmium sulphide, XRD patterns, solvothermal method, electrical measurements

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