Investigation on synthesis, structural and optical properties of CdS nanoparticles

Abstract

Hexagonal wurtzite structured CdS nanoparticles were synthesized by using a chemical precipitation method. Various spectroscopic technics were used for the characterization of the prepared sample. The X-ray diffraction pattern shows the high intense crystalline peaks and the average crystallite size is found to be 19 nm. FT-IR spectrum exhibited a metal sulfide band at 615 cm−1 and other functional groups. SEM micrographs reveal the non-uniformly distributed spherical shaped structures. EDS analysis confirms the stoichiometric composition and presence of target elements. The optical absorption spectrum exhibited a broad peak at 510 nm, which indicates the shifting of the absorption rage of CdS nanoparticles into the visible region. PL spectrum exhibited the characteristic emission bands in visible region.