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Citation: BAI Xiao-Fei, JIANG Hao, XU Jing, YAN Jing-Hui, KANG Zhen-Hui, LIAN Hong-Zhou. Synthesis of White LED Eu3+/Eu3+, Tb3+ Co-doped NaLu(MO4)(M=W, Mo) Phosphor via Microemulsion Method[J]. Chinese Journal of Inorganic Chemistry, ;2015, (2): 222-228. doi: 10.11862/CJIC.2015.053 shu

Synthesis of White LED Eu3+/Eu3+, Tb3+ Co-doped NaLu(MO4)(M=W, Mo) Phosphor via Microemulsion Method

  • 1.

    1. School of Chemical and Environmental Engineering, Changchun University of Science and Technology, Changchun 130022, China;

  • 2.

    2. Institute of Functional Nano & Soft Materials, Soochow University, Suzhou 215123, China;

  • 3.

    3. Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China

  • Corresponding author: YAN Jing-Hui, 
  • Received Date: 18 July 2014
    Available Online: 21 September 2014

    Fund Project: 国家重点基础研究发展计划(973计划)项目(No.2012CB82580) (973计划)项目(No.2012CB82580)国家自然科学基金重点项目(51132006) (51132006)吉林省科学技术厅科技支撑重点项目(No.20120223). (No.20120223)

  • 8%Eu3+/y%Eu3+,5%Tb3+(y=1, 3, 5, 7, 9)codoped NaLu(WO4)2-x(MoO4)x (x=0, 0.5, 1.0, 1.5, 2.0) phosphor were prepared via microemulsion method at room temperature. X-ray diffraction (XRD), scanning electron microscopy (SEM) and fluorescence spectroscopy were used to characterize the samples. The XRDof as-prepared samples were in agreement with the PDF#27-0729, showing that sample was the scheelite structure, belongs to the tetragonal crystal system. SEMimages showed that the as-prepared particles were shuttle. Particle size was about 110 nm. The critical activator molar concentration (Eu3+) in NaLu(WO4)(MoO4):Eu3+ was 8%. As the Mo content increased, the intensity of emission of Eu3+ activated at wavelength of 394 nm and 466 nm increased and reached a maximum when the relative ratio of nMo/nW was 1:1. The intense red-emission of the tungstomolybdate phosphors at near-UVand blue excitation suggested that the material was a potential candidate for white light emitting diode (WLEDs). This phosphor excited by 268, 394 and 466 nm, exhibited orange-red, yellow and pale yellow respectively, meeting the needs of the different light color. In the systems of NaLu(WO4)(MoO4):y%Eu3+,5%Tb3+(y=1, 3, 5, 7, 9) phosphors, with the increase of the doped concentration of Eu3+(y), the emission color of the co-doped NaLu(WO4)(MoO4) phosphors can be tuned precisely from green (x=0.278, y=0.514)to white (x=0.356, y=0.373), (x=0.385, y=0.313). At the same time, a very efficient energy-transfer from Tb3+ to Eu3+ can be observed.
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