Thermoluminescence and synchrotron radiation studies on the persistent luminescence of BaAl{sub 2}O{sub 4}:Eu{sup 2+},Dy{sup 3+}

Journal Article · Fri Oct 15 04:00:00 EDT 2010 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2010.07.044· OSTI ID:21483655

Rodrigues, L C.V. ^[1]; Stefani, R ^[1]; Felinto, M C.F.C. ^[2]; Hoelsae, J; Lastusaari, M ^[3]; Laamanen, T; Malkamaeki, M ^[3]

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1. Universidade de Sao Paulo, Instituto de Quimica, Departamento de Quimica Fundamental, Av. Prof. Lineu Prestes, 748, CEP 05508-900, Sao Paulo, SP (Brazil)
2. Instituto de Pesquisas Energeticas e Nucleares, Centro de Quimica e Meio Ambiente, Av. Prof. Lineu Prestes, 2242, Sao Paulo, SP (Brazil)
3. University of Turku, Department of Chemistry, FI-20014 Turku (Finland)

The persistent luminescence materials, barium aluminates doped with Eu{sup 2+} and Dy{sup 3+} (BaAl{sub 2}O{sub 4}:Eu{sup 2+},Dy{sup 3+}), were prepared with the combustion synthesis at temperatures between 400 and 600 {sup o}C as well as with the solid state reaction at 1500 {sup o}C. The concentrations of Eu{sup 2+}/Dy{sup 3+} (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. - Graphical abstract: BaAl{sub 2}O{sub 4}:Eu{sup 2+},Dy{sup 3+} phosphors: Thermoluminescence glow curve and synchrotron radiation spectra. Persistent luminescence photographs obtained after ceased UV irradiation.

• OSTI ID: 21483655
• Journal Information: Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 10 Vol. 183; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ABSORPTION SPECTROSCOPY
ALKALINE EARTH METAL COMPOUNDS
ALUMINATES
ALUMINIUM COMPOUNDS
BARIUM COMPOUNDS
BREMSSTRAHLUNG
CALCULATION METHODS
CHARGED PARTICLES
CHEMICAL REACTIONS
COMBUSTION
DENSITY FUNCTIONAL METHOD
DOPED MATERIALS
DYSPROSIUM IONS
ELECTROMAGNETIC RADIATION
EMISSION
ENERGY-LEVEL TRANSITIONS
EUROPIUM IONS
EXCITATION
FAR ULTRAVIOLET RADIATION
GLOW CURVE
IONS
LUMINESCENCE
MATERIALS
OXIDATION
OXYGEN COMPOUNDS
PHOSPHORS
PHOTON EMISSION
RADIATIONS
SPECTRA
SPECTROSCOPY
SYNCHROTRON RADIATION
THERMOCHEMICAL PROCESSES
THERMOLUMINESCENCE
ULTRAVIOLET RADIATION
ULTRAVIOLET SPECTRA
VARIATIONAL METHODS
X-RAY SPECTROSCOPY