Thermochemical Synthesis of CdS Nanoparticles and Investigation on Luminescence Properties

CdS nanoparticles were synthesized by a thermochemical method by using Na₂S₂O₃ and CdSO₄ as the precursors and thioglycerol as the capping agent. We have investigated the effect of different temperatures on the size and crystalline phase of the CdS nanoparticles. The results of the optical spectroscopy and XRD analyses clarified that increasing the synthesis temperature increased the final nanoparticles size and also changed the crystalline phase of the particles from hexagonal to cubic phase. The size of the synthesized particles was less than 4 nm. TEOS was also used in cooperation with thioglycerol for better surface passivation. The results of the PL analysis showed that using this material causes a decrease in surface trap dependent luminescence of the CdS nanoparticles.

Keywords:

• CdS nanoparticles
• capping agent
• XRD
• photoluminescence