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《Journal of Functional Materials》 2010-07
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Preparation and luminescent properties of Zn_2Ca(PO_4)_2:Tb~(3+) green phosphor

YANG Zhin-ping1,MA Shu-yuan1,YU Hong-wei2,MA Xin1(1.Physics Science and Technology College,Hebei University,Baoding 071002,China;2.College of Electronic and Informational Engineering,Hebei University,Baoding 071002,China)  
A green-emitting phosphor Zn2Ca(PO4)2:Tb3+ was prepared by high temperature solid-state reaction.The XRD pattern indicated that the phosphor of Zn2Ca(PO4)2:Tb3+ which was synthesized under reducing atmosphere at high temperature was pure phase.The results showed that the excitation spectra was located at 340-400nm and the emission peaks were at 490,544,584,622nm,corresponding to 5D4→7FJ(J=6,5,4,3) transitions of Tb3+.The effect of the contents of Tb3+ ion in Zn2Ca(PO4)2 on the luminescent intensity was studied.The self-quenching mechanism of the emission monitored at 544nm of Tb3+ was analyzed.And the effect on the luminescent property of the phosphor by adding the sensitizer Ce3+ was also investigated.The luminescence characteristics demonstrate that this green phosphor,Zn2Ca(PO4)2:Tb3+,has a potential application for UVLED.
【Fund】: 国家自然科学基金资助项目(50902042);; 河北省自然科学基金资助项目(F2009000217)
【CateGory Index】: O482.31
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