Europium luminescence enhancement in Al{sub 2}O{sub 3}:Eu{sup 3+} powders prepared by direct combustion synthesis

Journal Article · Thu Feb 01 00:00:00 EST 2007 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.2431400· OSTI ID:20982690

Rakov, Nikifor; Maciel, Glauco S; Lozano B, W; Araujo, Cid B. de ^[1]

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1. Universidade Federal do Vale do Sao Francisco, 56306-410 Petrolina, Pernambuco (Brazil)

The luminescence properties of Eu{sup 3+}:Al{sub 2}O{sub 3} powders prepared via low temperature direct combustion synthesis was investigated. It was observed that the heat treatment of the powders modifies the dynamics of the radiative transition {sup 5}D{sub 0}{yields}{sup 7}F{sub 2} of Eu{sup 3+} (1.0 mol %) and produces an enhancement of the luminescence intensity by nearly one order of magnitude. The luminescence enhancement is attributed to the presence of Eu{sup 3+} in {alpha}-Al{sub 2}O{sub 3} crystalline phase as the heat treatment drastically reduces the amount of amorphous Al{sub 2}O{sub 3} phases present in the powder.

• OSTI ID: 20982690
• Journal Information: Journal of Applied Physics, Vol. 101, Issue 3; Other Information: DOI: 10.1063/1.2431400; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM OXIDES
COMBUSTION
EUROPIUM IONS
HEAT TREATMENTS
LUMINESCENCE
POWDERS
TEMPERATURE DEPENDENCE