Energy transfer processes in Eu3+ doped nanocrystalline La2TeO6 phosphor

La2TeO6 nanocrystals doped with Eu3+ ions have been prepared by the Pechini sol–gel process. A total of seven samples obtained with different Eu3+ concentrations (1–7%). The Eu3+ ions are usually taken as probe ions to test the local structure of the lanthanide in solids. Analyzing the luminescence...

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Veröffentlicht in:Journal of luminescence 2014-01, Vol.145, p.553-556
Hauptverfasser: Llanos, J., Castillo, R., Martín, I.R., Martín, L.L., Haro-González, P., González-Platas, J.
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Sprache:eng
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Zusammenfassung:La2TeO6 nanocrystals doped with Eu3+ ions have been prepared by the Pechini sol–gel process. A total of seven samples obtained with different Eu3+ concentrations (1–7%). The Eu3+ ions are usually taken as probe ions to test the local structure of the lanthanide in solids. Analyzing the luminescence has been shown two different sites for the Eu3+ ions (in good agreement with the crystallographic analysis). Moreover, the luminescence properties have been analyzed as function of the Eu3+ doping concentration in order to study the interaction between these ions. Under direct excitation into the 5D0 level (at 578nm) the corresponding decay curves show a pure exponential character independently of the Eu3+ concentration. However, the decay curves obtained for the 5D1 level becomes non-exponential for the higher doped nanocrystals samples indicating that the energy transfer processes are important. •Study of the energy transfer processes between the Eu3+ ions in Eu3+ doped nanocrystalline La2TeO6 phosphors.•Study of the behavior of the luminescence decay curves.•Study of the occupancy of the Eu3+ ion in the crystallographic sites in the host structure.
ISSN:0022-2313
1872-7883
DOI:10.1016/j.jlumin.2013.08.005