KNaCa_2(PO_4)_2基质中Ce^(3+)→Tb^(3+)的能量传递与发光特性  

Luminescence Properties and Energy Transfer from Ce^(3+) to Tb^(3+) in KNaCa_2(PO_4)_2

作　　者：杨志平[1] 刘鹏飞[1] 宋延春[1] 韩月[1] 赵引红[1] 周东站[1] 

机构地区：[1]河北大学物理科学与技术学院,保定071002

出　　处：《人工晶体学报》2012年第5期1245-1249,共5页Journal of Synthetic Crystals

基　　金：河北省自然科学基金(F2009000217)

摘　　要：采用高温固相法合成了Ce3+,Tb3+激活的KNaCa2(PO4)2发光材料,并对其发光特性进行了研究。荧光光谱测试表明:Ce3+的加入显著增强了Tb3+的发射强度,观察到Ce3+对Tb3+的发光存在明显的敏化现象,且测得KNaCa2(PO4)2∶xCe3+,yTb3+的最佳掺杂浓度为x=0.01,y=0.16。根据Forster-Dexter理论判定KNaCa2(PO4)2∶Ce3+,Tb3+中Ce3+对Tb3+的能量传递属于电偶极-电四极相互作用引起的共振能量传递。研究表明,KNaCa2(PO4)2∶Ce3+,Tb3+材料是一种优良的紫外-近紫外激发白光LED用高亮度绿色发光材料。KNaCa2（PO4）2：Ce3＋,Tb3＋ was synthesized by high temperature solid-state reaction and the luminescence properties were also investigated.Fluorescence spectra measurements indicated that the doped-Ce3＋ enhanced the spectra intensity significantly.Optimal concentration of KNaCa2（PO4）2：xCe3＋,yTb3＋ is x=0.01,y=0.16.According to the Dexter＇s theory,it was judged the energy transfer mechanism from Ce3＋ to Tb3＋ was the electric dipole-quadripole interaction of the resonance transfer.The experimental results show that the KNaCa2（PO4）2：Ce3＋,Tb3＋ is single host phosphor with superior properties for white light emitting UV-LED.

关 键 词：高温固相法 KNaCa2(PO4)2 发射强度 共振能量传递 

分 类 号：O482.31[理学—固体物理]