Costa, Francine Bettio [UNESP]Souza, Ana Kely RufinoSilva, Junior ReisMoraes, João Carlos Silos [UNESP]de Oliveira Nunes, Luiz Antonioda Cunha Andrade, Luis HumbertoEl-Mallawany, RaoufLima, Sandro Marcio2019-10-062019-10-062019-11-15Journal of Non-Crystalline Solids, v. 524.0022-3093http://hdl.handle.net/11449/190620Lithium tellurite glasses with xTeO2 + (100 − x)Li2O nominal composition, where x = 95, 90, 85, 80, 75 and 70 mol%, have been prepared to investigate the dependence of the Te4+ emission as a function of the lithium modifier. Optical and structural properties of the glasses were explored by using UV–Vis absorption, photoluminescence and photoluminescence excitation spectroscopies, photoluminescence lifetime and Raman spectroscopy. Besides, the influence of Li2O in the glass structure was verified by density, glass transition temperature, thermal stability, glass-forming tendency, optical band edge and the number of non-bridging oxygen. The results support there is a good correlation between the glass structure and the Te4+ center concentration: the Li2O content contributes to increase the Te4+ in the glass structure.engLithium as modifierPhotoluminescenceTe4+ centersTellurite glassesArtigo10.1016/j.jnoncrysol.2019.119609Acesso aberto2-s2.0-85071619602