Synthesis of CdS Nanoparticles: Surface Morphology and Optical Study

Abstract

In the present study, high-quality cadmium sulfide (CdS) nanoparticles were synthesized using a simple and low-cost chemical precipitation method. Particle size control was achieved through the use of thioglycerol as a capping agent. The optical properties of the synthesized CdS nanoparticles were investigated using UV–visible spectroscopy, which revealed strong absorption in the visible region with a noticeable blue shift of the absorption edge toward shorter wavelengths, confirming the nanoscale nature of the CdS particles. To explore their applicability in optoelectronic devices, CdS nanoparticle thin films were fabricated using the spin-coating technique. The surface morphology of the deposited films was examined using field-emission scanning electron microscopy (FE-SEM), which confirmed the formation and uniform distribution of nanoparticles. The results demonstrate that the chemical precipitation approach provides an effective and scalable route for producing CdS nanoparticles suitable for low-cost optoelectronic applications, including solar cells and light-emitting diodes