Preparation and Photoluminescence Properties of Eu2+-Doped Oxyapatite-Type SrxLa10−x(SiO4)6O3−x/2
Résumé
Eu2+-doped oxyapatite SrxLa10−x(SiO4)6O3−x/2 phosphors are prepared by solid-state reaction at high temperatures under reducing atmosphere. Their crystal structures and photoluminescence are investigated by x-ray diffraction (XRD) and fluorescence spectroscopy, respectively. The XRD results indicate that the samples are pure oxyapatite phase (P63/m space group). The fluorescence spectra show two peaks corresponding to two sites (4f and 6h sites) for Eu2+ in the host lattice. As the Eu2+ content influences the intensity ratio of the two observed emission peaks, the photoluminescence mechanism is discussed.
Domaines
MatériauxOrigine | Fichiers produits par l'(les) auteur(s) |
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