Evaluating the link between blue-green luminescence and cross-relaxation processes in Tb3+-doped glasses.
SANTOS, Jéssica Fabiana Mariano dos; ZANUTO, Vitor Santaella; SOARES, Ana Carolina Costa; SAVI, E.; NUNES, Luiz Antônio de Oliveira; BAESSO, Mauro Luciano; CATUNDA, Tomaz.
SANTOS, Jéssica Fabiana Mariano dos; ZANUTO, Vitor Santaella; SOARES, Ana Carolina Costa; SAVI, E.; NUNES, Luiz Antônio de Oliveira; BAESSO, Mauro Luciano; CATUNDA, Tomaz.
Abstract: In this study, luminescence properties of Tb3+-doped low silica calcium aluminosilicate glasses are analyzed as a function of Tb3+concentration (0.04-15.0 wt%). Decay curves for the 5D3 level are found to be non-exponential for all Tb3+concentrations due to ion-ion energy transfer through cross-relaxation process. To identify the origin of the energy transfer mechanism, the decay curves were well fitted by Inokuti?Hirayama model (s =6), which indicates that the energy transfer process is related to dipole?dipole interaction. Trivalent Tb-doped materials normally exhibit stronger green emission compared to blue emission, a feature that increases with Tb3+con- centration and is attributed to the cross-relaxation process. In this paper, we show a remarkable blue emission in comparison to other Tb3+-doped glasses. A theoretical model for the blue and green emissions, from 5D3 and 5D4 levels respectively, was proposed to establishing a link between the color emission and the 5D3 lifetime quenching due to a cross-relaxation process. This model was successfully applied to the experimental results of this paper as well as previous data in the literature.
@article={003042608,author = {SANTOS, Jéssica Fabiana Mariano dos; ZANUTO, Vitor Santaella; SOARES, Ana Carolina Costa; SAVI, E.; NUNES, Luiz Antônio de Oliveira; BAESSO, Mauro Luciano; CATUNDA, Tomaz.},title={Evaluating the link between blue-green luminescence and cross-relaxation processes in Tb3+-doped glasses},journal={Journal of Luminescence},note={v. 240 p. 118430-1-118430-9},year={2021}}