Preparation and Photoluminescence Properties of Eu²⁺-Doped Oxyapatite-Type Sr_xLa_10−x(SiO₄)₆O_3−x/2

Cui Zhao-Feng , Yuan Shuang-Long , Yang Yun-Xia , François Cheviré (1) , Franck Tessier (1) , Chen Guo-Rong

1 ISCR - Institut des Sciences Chimiques de Rennes

Eu²⁺-doped oxyapatite Sr_xLa_10−x(SiO₄)₆O_3−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: Matériaux

Cui Zhao-Feng, Yuan Shuang-Long, Yang Yun-Xia, François Cheviré, Franck Tessier, et al.. Preparation and Photoluminescence Properties of Eu²⁺-Doped Oxyapatite-Type Sr_xLa_10−x(SiO₄)₆O_3−x/2. Chinese Physics Letters, 2011, 28 (1), pp.014209. ⟨10.1088/0256-307X/28/1/014209⟩. ⟨hal-00854467⟩