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Photophysical properties of Eu3+ and Tb3+-doped ZnAl2O4 phosphors obtained by combustion reaction |
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| Authors: | B. S. Barros P. S. Melo R. H. G. A. Kiminami A. C. F. M. Costa G. F. de Sá S. Alves Jr |
| Affiliation: | 1. Department of Materials Engineering, Federal University of Campina Grande, Campina Grande, PB, Brazil 3. Department of Materials Engineering, Federal University of S?o Carlos, S?o Carlos, SP, Brazil 2. Rare Earth Laboratory – BSTR, Department of Fundamental Chemistry, Federal University of Pernambuco, Recife, PE, Brazil |
| Abstract: | Europium- and terbium-doped zinc aluminate oxide nanocrystals with a spinel structure were successfully prepared by a combustion method, using urea as fuel. The samples thus obtained were characterized by X-ray diffraction, scanning electron microscopy and luminescence spectroscopy. X-ray diffraction results confirmed the formation of ZnAl2O4 spinel phase and a minor amount of ZnO. Our SEM results revealed agglomerates in the shape of irregular plates composed of nanoparticles with dispersed points of second phase in the surface. Powders containing Eu3+ and Tb3+ ions displayed red and green photoluminescence, respectively. |
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