Physical, absorption and photoluminescence performance of Eu3+ doped lithium chloride tellurite glass

Abstract

A series of (74.4-x) TeO2 – (4.3) LiO2 – (21.3) LiCl – (x) Eu2O3 with 0.0 ≤ x ≤ 2.0 mol % has been made using melt-quenching technique and their optical characteristic has been studied. The present works cover the preparation of the glass sample and the effects of Eu3+ on the physical properties, absorption and photoluminescence behaviour of the lithium chloride tellurite glass. The physical properties such as density and molar volume are determined. It is found that the density and molar volume presents fluctuation trends. As the samples are excited at 393 nm, six emission peaks have been observed at 532, 552, 586, 613, 649, and 697 nm indicating the transitions of5D1 →7F1,5D0 →7F0,5D0 →7F1,5D0 →7F2,5D0 →7F3 and5D0 →7F4 respectively. It is observed that transition5D0 →7F2 shows the highest intensity. The emission intensity increases with the increment of Eu2O3 concentration. The high-intensity ratios of 1.88 observed for glass sample contain 2.0 mol % Eu2O3 concentrations indicate a greater degree of Eu-O-covalency and possess the better quality of host matrix.