Please use this identifier to cite or link to this item: http://www.repositorio.ufop.br/handle/123456789/1218
Title: Persistent luminescence of Eu2+ and Dy3+ doped barium aluminate (BaAl2O4:Eu2+,Dy3+) materials.
Authors: Stefani, Roberval
Rodrigues, Lucas Carvalho Veloso
Carvalho, Carlos Alberto Alves de
Felinto, Maria Claudia França da Cunha
Brito, Hermi Felinto de
Lastusaari, Mika
Hölsä, Jorma
Keywords: Barium aluminate
Dysprosium
Europium
Persistent luminescence
Issue Date: 2009
Publisher: Optical Materials
Citation: STEFANI, R. et al. Persistent luminescence of Eu2+ and Dy3+ doped barium aluminate (BaAl2O4:Eu2+,Dy3+) materials. Optical Materials, v. 31, n.12, p.1815-1818, out. 2009. Disponível em: <http://www.ipen.br/biblioteca/2009/14530.pdf>. Acesso em: 01 ago. 2012.
Abstract: Polycrystalline Eu2+ and Dy3+ doped barium aluminate materials, BaAl2O4:Eu2+,Dy3+, were prepared with solid state reactions at temperatures between 700 and 1500 _C. The influence of the thermal treatments on the stability, homogeneity and structure as well as to the UV-excited and persistent luminescence of the materials was investigated by X-ray powder diffraction, SEM imaging and infrared spectroscopies as well as by steady state luminescence spectroscopy and persistent luminescence decay curves, respectively. The IR spectra of the materials prepared at 250, 700, and 1500 _C follow the formation of BaAl2O4 composition whereas the X-ray powder diffraction of compounds revealed how the hexagonal structure was obtained. The morphology of the materials at high temperatures indicated important aggregation due to sintering. The luminescence decay of the quite narrow Eu2+ band at ca. 500 nm shows the presence of persistent luminescence after UV irradiation. The dopant (Eu2+) and co-dopant (Dy3+) concentrations affect the crystallinity and luminescence properties of the materials.
URI: http://www.repositorio.ufop.br/handle/123456789/1218
ISSN: 09253467
metadata.dc.rights.license: O periódico Optical Materials concede permissão para depósito deste artigo no Repositório Institucional da UFOP. Número da licença 3333160408518.
Appears in Collections:DEQUI - Artigos publicados em periódicos

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