Synthesis and Characterization of CdS Nanostructures

Abstract

We have successfully synthesized CdS nanoparticles by Cadmium sulphate, Thiourea and Ammonia solution as the complexing agent by chemical route method.  The formation of CdS was confirmed with the help of infrared (IR) spectroscopy by observing bands corresponding to the multi phonon absorption. The diffraction pattern of the material was obtained using X-ray diffractometer, which revealed the crystallinity of CdS_. The average grain size was determined as 42.49 nm using Debye-Scherrer’s formula. The absorption spectrum of the material was obtained using UV–Visible spectrophotometer and shows a high absorption in the visible region. The direct optical band gap is obtained as 2.0 eV from the Tauc’s extrapolation. The structural morphology was also investigated using Scanning Electron Microscope (SEM) and the images shows agglomeration of grains in form of islands. Cadmium sulfide is one of the most promising materials for solar cells and of great interest for their practical applications in electronics and photonics.