Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5400216 | Journal of Luminescence | 2014 | 4 Pages |
Abstract
La2TeO6 nanocrystals doped with Eu3+ ions have been prepared by the Pechini sol-gel process. A total of seven samples obtained with different Eu3+ concentrations (1-7%). The Eu3+ ions are usually taken as probe ions to test the local structure of the lanthanide in solids. Analyzing the luminescence has been shown two different sites for the Eu3+ ions (in good agreement with the crystallographic analysis). Moreover, the luminescence properties have been analyzed as function of the Eu3+ doping concentration in order to study the interaction between these ions. Under direct excitation into the 5D0 level (at 578Â nm) the corresponding decay curves show a pure exponential character independently of the Eu3+ concentration. However, the decay curves obtained for the 5D1 level becomes non-exponential for the higher doped nanocrystals samples indicating that the energy transfer processes are important.
Related Topics
Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
Authors
J. Llanos, R. Castillo, I.R. MartÃn, L.L. MartÃn, P. Haro-González, J. González-Platas,