Resumo de eventos cient??ficos
Thermoluminescence and synchrotron radiation studies on the persistent luminescence of BaAlsub(2)Osub(4):Eusup(2+), Dysup(3+)
Autor
RODRIGUES, L.C.V.
STEFANI, R.
BRITO, H.F.
FELINTO, M.C.F.C.
INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS, 11th
Resumen
Barium aluminates doped with Eu2+ and Dy3+ (BaAl2O4:Eu2+,Dy3+) were prepared with the combustion synthesis at
temperatures between 400 and 600 ??C as well as with the solid state reaction at 1500 ??C. The concentrations of Eu2+/Dy3+ (in mole% of
the Ba amount) ranged from 0.1/0.1 to 1.0/3.0. The electronic and defect energy level structures were studied with thermoluminescence
(TL) and different synchrotron radiation spectroscopies: UV-VUV excitation and emission, XANES and EXAFS. Theoretical calculations
using the Density Functional Theory (DFT) were carried out in order to compare with the experimental data.