EFFECT OF METALLIC NANOPARTICLES ON THE EMISSION OF ZINC TELLURITE GLASS

Abstract

The optical emission properties of a series of metallic nanoparticles doped zinc tellurite glasses are investigated using photoluminescence spectroscopy measurement. The melt quenching method was used to synthesize the metallic (Ag, Au, Fe3O4 and NiO) nanoparticles doped zinc tellurite glass. Series of Gold (Au) nanoparticles doped zinc tellurite glass at room temperature have been up conversion emission spectra under 779 nm. Excitation shows three peaks centered at 520, 550 and 660 nm corresponding to the transitions from 2H11/2, 4S3/2 and 4F9/2 excited states to 4I15/2 ground state. The series of silver (Ag) nanoparticles and Er3+ ion doped zinc tellurite glass have been the up conversion luminescence spectra revealed three major emission peaks at 520, 550 and 650 nm originating from 2H11/2, 4S3/2 and 4F9/2 levels, respectively. An efficient enhancement in visible region is observed for samples containing metallic nanoparticles (Ag and Au NPs). Meanwhile, The series tellurite glass embedded with magnetic (Fe3O4 and NiO) NPs are displayed tend to quenched as concentration of the Fe3O4 and NiO NPs is increased. The increasing NPs (Fe3O4 and NiO) concentration dependent luminescence quenching is attributed to the energy transfer from the rare earth ion to NPs.