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Thermoluminescence and synchrotron radiation studies on the persistent luminescence of BaAl2O4:Eu2+,Dy3+

2010; Elsevier BV; Volume: 183; Issue: 10 Linguagem: Inglês

10.1016/j.jssc.2010.07.044

1095-726X

Lucas Carvalho Veloso Rodrigues, R. Stefani, Hermi F. Brito, M.C.F.C. Felinto, Jorma Hölsä, Mika Lastusaari, Taneli Laamanen, Marja Malkamäki,

Luminescence and Fluorescent Materials

The persistent luminescence materials, 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 mol% 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 synchrotron radiation (SR) spectroscopies: UV–VUV excitation and emission, as well as with X-ray absorption near-edge structure (XANES) methods. Theoretical calculations using the density functional theory (DFT) were carried out in order to compare with the experimental data.