Speaker
Description
The enhancement of luminescence properties of Sm3+ in tellurite glasses containing silver nanoparticles (AgNPs) have been investigated. The glass samples with chemical composition of (53.5-x(TeO2 : 10ZnO : 35BaO : 1.5Sm2O3 : xAgNPs (where x= 0.00, 0.01, 0.02, 0.03, 0.04, and 0.05 % by mol) were prepare by the conventional melt quenching technique. The results show that the density and molar volume of glass are not depend on AgNPs concentration. The absorption bands in NIR region are observed and located at 946, 1082, 1235, 1382, 1488, 1540, 1593 and 1959 nm. The luminescence spectra of the Sm3+ doped in glasses are observed at 563 (green), 600 (orange), 645 (red) and 707 (red) nm which are attributed to 4G5/2 6H5/2, 4G5/2 6H7/2, 4G5/2 6H9/2 and 4G5/2 6H11/2 transitions, respectively. Moreover, the luminescence intensity of all the emission bands is increased with AgNPs concentration up to 0.01 % mol. The effect of AgNPs concentration on luminescence intensity and decay time of glasses are also discussed.
