绿色荧光粉Zn_2Ca(PO_4)_2:Tb^(3+)的制备及发光性能研究  

Preparation and luminescent properties of Zn_2Ca(PO_4)_2:Tb^(3+) green phosphor

作　　者：杨志平[1] 马淑媛[1] 于红伟[2] 马欣[1] 

机构地区：[1]河北大学物理科学与技术学院发光与显示研究所,河北保定071002 [2]河北大学电子信息工程学院,河北保定071002

出　　处：《功能材料》2010年第7期1228-1231,共4页Journal of Functional Materials

基　　金：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)

摘　　要：采用高温固相法合成了绿色荧光粉Zn2Ca(PO4)2:Tb3+,测定了该荧光粉的XRD图谱、激发光谱及发射光谱。XRD图谱表明在高温还原气氛下合成了纯相的荧光粉Zn2Ca(PO4)2:Tb3+。该荧光粉的激发谱位于340～400nm。在紫外激发下主要发射峰位于490、544、584、622nm,对应于Tb3+的5D4→7F6、5D4→7F5、5D4→7F4、5D4→7F3的特征发射。考察了Tb3+的掺杂浓度对样品发光效率的影响,分析了Tb3+的544nm发射的自身浓度猝灭机理并探讨了敏化剂Ce3+离子的加入对荧光粉发光的影响。此绿色荧光粉Zn2Ca(PO4)2:Tb3+是一种很有潜力的适于UVLED管芯激发的发光粉。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.

关 键 词：发光 荧光粉 猝灭 Zn_2Ca(PO_4)_2:Tb^(3+) 

分 类 号：O482.31[理学—固体物理]