Physical and optical properties of zinc tellurite Glass embedded Silver Nanoparticles co-dopedwith Nd3+/Er3+ ions

Abstract

A series of Silver Nanoparticles embedded in the system of zinc-tellurite glass co-doped Neodymium/Erbium ions with the composition of (69.5-2.5x)TeO2–30ZnCl2–xNd2O3–xEr2O3–(0.5+0.5x)AgCl concentration from 0.0 to 3.0 mol% (x=0, 1, 2 and 3) have successfully been synthesized by melt-quenching techniques. The amorphous nature of the glass was confirmed from x-ray diffraction technique. The decrease of refractive index from 2.446 to 2.429 is attributed to the generation of bridging oxygen atoms via the conversion of TeO3 into TeO4 units. Conversely the increase in refractive index to 2.436 is attributed to the generation of non-bridging oxygen atoms via the conversion of TeO4 into TeO3 units. From the absorption edge studies, the value of the optical band gap EIopt.. and Urbach energy (DE) have been evaluated. The value of EIopt. lies between 2.34 and 2.83eV for the indirect transition while the Urbach energy values lies between 0.005 to 1.33eV. The experimental results indicate that Nd3+/Er3+ rare earth ions co-doped in the system of zinc-tellurite glasses embaded silver nanoparticles are a good candidates for solid state laser as active medium.

Effects of Dy2O3 doping on physical and mechanical characteristics of B2O3-TeO2-BaO glass

“…2 shows the locations and functions of the band in the glasses. The 464-471 cm-1 band (q 1 ) was caused by the vibration of the Te-O-Te bond between TeO4 and BO [14,20]. There are three-dimensional networks of TeO2 rich glasses that contain oxygen at two equatorial and axial sites, where only one equatorial site is connected to a lone pair electron ofTeO4 polyhedron having 1 short and 3 extended Te-O bonds.…”

A Review on Physical and Optical Properties of Zinc Tellurite Glasses Co-doped with different rare earth ions

“…The glass forming mechanism is being understood by this. It is interesting to investigate the photoluminescence behaviour and the structural properties by using Differential thermal analysis (DTA), Fourier transform infrared spectroscopy (FTIR) and Raman spectroscopy in these glass systems as a function of co-dopant concentration 25 .…”