New synthesis of quantum dots copper sulfide using the UV-irradiation technique

Abstract

The article describes a new method for synthesizing quantum dots copper sulfide (CuS QDs) based on the UV-irradiation technique (photolysis method). Our process allows producing high-quality, small-size, very low cost and short time. The crystal structure of CuS QDs was characterized using X-ray diffraction (XRD) ,which confirmed the synthesized sample's hexagonal shape. The structure of the manufactured product was examined using energy-dispersive X-ray spectroscopy (EDX), and the result revealed just copper (Cu) and sulfide (S) elements, indicating that the synthetic material was pure. The morphology, optical properties, and particle size were investigated by photoluminescence spectroscopy (PL), scanning electron microscope (SEM), and transmission electron spectroscopy (TEM). The particles sizes of the CuS QDs were found to be range between 5.4 to 9.1 nm. Finally, this method successfully synthesized CuS QDs through the results.