Studies on Characterization, Optical Absorption, and Photoluminescence of Yttrium Doped ZnS Nanoparticles

Abstract

Pure ZnS and ZnS:Y nanoparticles were synthesized by a chemical coprecipitation route using EDTA-ethylenediamine as a stabilizing agent. X-ray diffraction (XRD), high resolution transmission electron microscopy (HRTEM), field emission scanning electron microscopy (FE-SEM), Fourier transform infrared spectrometry (FTIR), thermogravimetric-differential scanning calorimetry (TG-DSC), and UV-visible and photoluminescence (PL) spectroscopy were employed to characterize the assynthesized ZnS and ZnS:Y nanoparticles, respectively. XRD and TEM studies show the formation of cubic ZnS:Y particles with an average size of ∼4.5 nm. The doping did not alter the phase of the zinc sulphide, as a result the sample showed cubic zincblende structure. The UV-visible spectra of ZnS and ZnS:Y nanoparticles showed a band gap energy value, 3.85 eV and 3.73 eV, which corresponds to a semiconductor material. A luminescence characteristics such as strong and stable visible-light emissions in the orange region alone with the blue emission peaks were observed for doped ZnS nanoparticles at room temperature. The PL intensity of orange emission peak was found to be increased with an increase in yttrium ions concentration by suppressing blue emission peaks. These results strongly propose that yttrium doped zinc sulphide nanoparticles form a new class of luminescent material.

Structural, optical and antibacterial properties of yttriumdoped ZnO nanoparticles

“…2. Similar trend for was reported for Y-doped ZnS nanoparticles [17]. The unit cell volume is also following similar trend.…”

Structural and optical properties of ZnS/MgNb2O6 heterostructures

“…Other researchers [30][31] relate the PL emission in ZnS nanocrystals to the presence of sulfur vacancy and point defects.…”

Gamma induced changes in the structure and optical properties of ZnS/PVA nanocomposite

“…ZnS nanoparticles were synthesized, as previously reported , by chemical coprecipitation method in air atmosphere using EDTA as stabilizing agent. In a typical procedure, 0.5 M zinc nitrate (of purity 99.999%) were dissolved in 50 mL of distilled water‐ethanol (equal volume) and stirred for 10 min at 80°C.…”

“…PVA is a distinguished base material that has natural properties providing a good host matrix for the embedding of nanoparticles. Besides, the investigation has been focused on the preparation and characterization of II–VI semiconductor nanoparticles for various applications . Among these families, a nontoxic semiconductor zinc sulfide (ZnS) is one of the most important materials for both applications and basic research.…”