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Luminescence properties of Eu2+and Eu3+doped calcium-deficient hydroxyapatite prepared in air

Authors
Journal
Journal of Alloys and Compounds
0925-8388
Publisher
Elsevier
Publication Date
Volume
509
Issue
25
Identifiers
DOI: 10.1016/j.jallcom.2011.04.003
Keywords
  • Calcium-Deficient Hydroxyapatite
  • Precipitation
  • Luminescence
  • Eu2+
  • Eu3+
Disciplines
  • Design

Abstract

Abstract Eu-doped calcium-deficient hydroxyapatite Ca 8.95Eu 0.05HPO 4(PO 4) 5OH (designated CDHA:Eu) was prepared via the coprecipitation method and calcined in air. Phase purity, crystal structure and morphology of the CDHA:Eu were characterized using X-ray diffraction spectrometer and scanning electron microscopy. The photoluminescence excitation and emission spectra of Eu 2+ and Eu 3+ ions were measured using luminescence spectrometer. The emission spectra showed a broad emission band centered at 450 nm corresponded to the typical 4f 65d 1 → 4f 7 transition of Eu 2+ ions, and sharp peaks corresponded to the 5D 0 → 7F J ( J = 0, 1, 2, 3, 4) transitions of Eu 3+ ions. This research was focused on the site-distribution of Eu 3+ ions. The Eu 3+ in different sites had different spectroscopic features and the charge compensation mechanisms were also discussed.

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