Journal
JOURNAL OF LUMINESCENCE
Volume 158, Issue -, Pages 469-474Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jlumin.2014.10.024
Keywords
YVO4; Eu3+; Nanocrystalline powder; Luminescence; Concentration quenching; Lifetime
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Funding
- Ministry of Education And Science of the Russian Federation [14.604.21.0078]
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Eu3+-doped YVO4 nanopowders were prepared by the modified Pechini method. The structural properties were studied with XRD, SEM and Raman spectroscopy. XRD pattern indicates that nanocrystalline YVO4:Eu3+ powders form only pure tetragonal phase. SEM images show that synthesized samples are mixture of large, well-faceted particles and weakly agglomerated nanoparticles. The symmetry of luminescent centers local surrounding was discussed in terms of asymmetry coefficient. Dependence of luminescent intensity on Eu3+ doping concentration was studied at different excitation wavelengths. Lifetimes of D-5(0) level were measured for all the synthesized nanopowders. Also the probabilities of radiative, nonradiative processes, and the radiative lifetimes were calculated. (C) 2014 Elsevier B.V. All rights reserved.
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