Luminescence properties of multilayer coated single structure ZnS/CdS/ZnS nanocomposites

Water soluble ZnS, CdS and multilayer coated ZnS/CdS/ZnS nanocomposites were successfully synthesized by chemical method in an air atmosphere. Structural, morphology and optical properties were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), UV–visible absorption (UV–vis) and photoluminescence (PL) spectrometer. The obtained particles are highly crystalline and monodisperse with an average particle size of 4.3–5.6 nm range. A significant red shift was observed by increasing the CdS thickness in ZnS/CdS/ZnS nanocomposites. The PL position of ZnS and CdS compound is tuned in the visible region by the way of alteration layer thickness.

High quality and single phased ZnS/CdS/ZnS nanocomposites were successfully synthesized by a simple chemical method in an air atmosphere at 80 °C.Figure optionsDownload as PowerPoint slideHighlights
► High quality and single phased ZnS/CdS/ZnS nanocomposites were successfully synthesized in an air atmosphere at 80 °C.
► A strong blue shift was observed in UV absorption.
► PL spectrum of the multiple coated nanocomposites was tuned in the visible region by varying a particular layer thickness.