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Thermoluminescence and synchrotron radiation studies on the persistent luminescence of BaAl2O4:Eu,Dy |
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| Authors: | L.C.V. Rodrigues,R. Stefani,M.C.F.C. Felinto,M. Lastusaari,T. Laamanen,M. Malkamä ki |
| Affiliation: | a Universidade de São Paulo, Instituto de Química, Departamento de Química Fundamental, Av. Prof. Lineu Prestes, 748, CEP 05508-900, São Paulo, SP, Brazil b University of Turku, Department of Chemistry, FI-20014 Turku, Finland c Instituto de Pesquisas Energéticas e Nucleares, Centro de Química e Meio Ambiente, Av. Prof. Lineu Prestes, 2242, São Paulo, SP, Brazil d Turku University Centre for Materials and Surfaces (MatSurf), Turku, Finland e Graduate School of Materials Research (GSMR), Turku, Finland |
| Abstract: | 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. |
| Keywords: | Persistent luminescence Barium aluminate Europium Thermoluminescence Synchrotron radiation DFT |
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