Journal of Inorganic Materials ›› 2016, Vol. 31 ›› Issue (6): 634-640.DOI: 10.15541/jim20150479

• Orginal Article • Previous Articles     Next Articles

Synthesis and Property of Spherical Lu3Al5O12:Eu3+ Phosphor

LI Jin-Kai1,2, TENG Xin1, CAO Bing-Qiang1, LIU Zong-Ming1   

  1. (1. School of Materials Science and Engineering, University of Jinan, Jinan 250022, China; 2. Key Laboratory for Anisotropy and Texture of Materials, Northeastern University, Shenyang 110004,China)
  • Received:2015-10-08 Revised:2015-11-17 Published:2016-06-20 Online:2016-05-19
  • About author:LI Jin-Kai. E-mail: mse_lijk@ujn.edu.cn
  • Supported by:
    National Natural Science Foundation of China (51402125);Research Award Fund for Young and Middle-aged Scientist in Shandong Province (BS2014CL027);Research Fund for the Doctoral Program of University of Jinan (XBS1447);Natural Science Foundation of University of Jinan (XKY1515);Science Foundation for Post Doctorate Research from the University of Jinan

Abstract:

Spherical phosphors of (Lu0.95Eu0.05)3Al5O12 ((Lu0.95Eu0.05)AG) with good dispersion was achieved through precursor synthesis via homogeneous precipitation method using urea as the precipitant, followed by annealing. The size of spherical particle can be effectively controlled by adjusting the urea concentration. Based on it, the synthesis, phase evolution and photoluminescent properties of the (Lu0.95Eu0.05)AG phosphors were tested by XRD, FE-SEM, TEM, BET, PLE/PL, and fluorescence decay analyses. The results showed that the precursors were converted into phase-pure (Lu0.95Eu0.05)AG garnet at a relatively low temperature of 1100℃. The (Lu0.95Eu0.05)AG garnets possessed high theoretical densities which were suitable for the application of scintillation material. The phosphors exhibited strong orange red emissions at 592 nm (the 5D07F1 magnetic dipole transitions of Eu3+) upon UV excitation into the charge transfer band (CTB) at 235 nm, with CIE chromaticity coordinates of (0.63, 0.37). The intensity of 592 nm emission increased with the particle size increase, while the lifetime of 592 nm emission decreases at a higher particle size. Thus, the spherical phosphors of (Lu0.95Eu0.05)AG garnet developed in the present work were expected to be a new type of phosphor which may be widely used in lighting and displaying areas.

Key words: Lu3Al5O12 garnet, Eu3+ doping, spherical particle, luminescent property

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