Mn-DOPED ZnS QDs: A STUDY ON OPTICAL AND PHOTOLUMINESCENT PROPERTIES

Abstract

This study focuses on the synthesis, characterization and potential applications of manganese (Mn) doped zinc sulfide (ZnS) quantum dots (QDs) via hot injection method, allowing a precise control over the doping concentration. In this facile and reproducible synthesis, 2- Mercaptoethanol is used as capping agent. The synthesis was conducted at 70 °C in an inert environment of N2 gas. This study's primary goal was to find out how Mn doping affected the structural, optoelectronic, and magnetic characteristics of ZnS QDs, with 1% and 2% doping concentrations in different samples. Synthesis is followed by detailed characterization using several techniques such as X-ray diffractometry (XRD), Transmission electron microscopy (TEM), Photo Luminescence (PL) spectroscopy, and UV-Vis spectroscopy. The ZnS lattice's crystalline structure and the successful integration of Mn ions are verified using XRD examination. TEM images demonstrate the formation of well-dispersed Mn-doped ZnS QDs with controlled particle size. This research provides valuable insights into the synthesis and properties of Mn-doped ZnS quantum dots, giving the ways for their utilization in various technological applications in optoelectronic devices, bioimaging, photocataysts , sensors and various drugs.