Features of the Phase Composition and Structure of Eu Doped Y2O3 Submicrospheres

Bezkrovnyi, O.S.; Yermolayeva, Yu.V.; Matveevskaya, N.A.; Vovk, O.M.; Tolmachev, A.V.

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Title	Features of the Phase Composition and Structure of Eu Doped Y2O3 Submicrospheres
Authors	Bezkrovnyi, O.S. Yermolayeva, Yu.V. Matveevskaya, N.A. Vovk, O.M. Tolmachev, A.V.
ORCID
Keywords	Solid Solution Structure Yttrium Oxide Sphere Luminescence Segregation
Type	Conference Papers
Date of Issue	2013
URI	http://essuir.sumdu.edu.ua/handle/123456789/35217
Publisher	Sumy State University
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Citation	Features of the Phase Composition and Structure of Eu Doped Y2O3 Submicrospheres [Текст] / O.S. Bezkrovnyi, Y.V. Yermolayeva, N.A. Matveevskaya et al. // Nanomaterials: Applications & Properties (NAP-2013) : 3-rd International conference, Alushta, the Crimea, Ukraine, September 16-21, 2013 / Edited by: A. Pogrebnjak. - Sumy : Sumy State University, 2013. - V.2, No2. - 02PCN30
Abstract	Polycrystalline, non-agglomerated nanopowders based on monosized (Y1-xEux)2O3 submicrospheres were prepared. It was shown that the annealing temperature strongly influences on the structure, mor-phology and composition of the spherical (Y1-xEux)2O3 phosphors obtained. It was found that the concentra-tion quenching effects of Eu3+ luminescence in the (Y1-xEux)2O3 spheres with 70-280 nm diameter is shifted to lower Eu3+ concentrations (x =0,02; 0,05 for 70 and 280 nm spheres respectively) compared with the mi-crocrystalline powders with similar composition (x = 0,09). The reason of this phenomenon probably is for-mation of inhomogeneous phase of (Y1-xEux)2O3 solid solution in the nanopowders with the primary location of bigger Eu3+ ions in the surface area due to active diffusion processes. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/35217
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