Synthesis and characterization of Cd1-xZnxS ternary nanocrystals

II-VI wide band gap semiconductors and their properties are of great interest for various optoelectronic and solid-state lighting applications. We have synthesized a series of high quality mono-dispersed Cd1-xZnxS (0≤x≤1.0) quantum dots by co-precipitation method at 6°C temperature. X-ray diffraction (XRD), Small angle X-ray scattering (SAXS) and UV-Visible spectrophotometer was used to characterize the sample. X-ray diffractometer confirm the formation of Cd1-xZnxS alloy. All the composition have an average grain size of the order of 4 nm and show a shifting in diffraction peaks towards higher 2θ values by increase in Zn content. The composition dependence of the band gap energy in the ternary system was determined by optical transmission, which shows that the band gap varies linearly with x from 4.1ev (Eg for ZnS) to 2.6ev (Eg for CdS).