Ca_(10)Li(PO_4)_7∶Dy^(3+),Ce^(3+)材料的制备及发光性能  

Synthesis and Luminescence Properties of A Novel Ca_(10)Li( PO_4)_7∶Dy^(3+),Ce^(3+)Phosphor

作　　者：杨志平[1] 赵引红[1] 梁晓双 刘鹏飞[1] 吕梁[2] 

机构地区：[1]河北大学物理科学与技术学院,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：《发光学报》2013年第10期1279-1282,共4页Chinese Journal of Luminescence

基　　金：国家自然科学基金(51202053);河北省自然科学基金(Q2012061)资助项目

摘　　要：采用高温固相法制备了Ca10Li(PO4)7∶Dy3+发光材料,研究了Dy3+在Ca10Li(PO4)7基质中的发光特性。XRD测量结果表明,烧结温度为1 050℃时所制备的样品为纯相Ca10Li(PO4)7晶体。从激发谱可以看出样品主激发峰位于349 nm(6H15/2→6P7/2),363 nm(6H15/2→6P5/2),385 nm(6H15/2→6M21/2),样品可被UVLED管芯有效激发。发射谱由位于481 nm(蓝)和572 nm(黄)的两个峰组成,对应的能级跃迁为4F9/2→6H15/2、6H13/2。研究了不同Dy3+掺杂浓度对发光强度的影响,当Dy3+的摩尔分数为10%时发光最强。掺入Ce3+作为敏化剂,Ce3+→Dy3+发生共振能量传递,当掺杂量为10%Dy3+、14%Ce3+时,样品发光最强,其强度为单掺10%Dy3+时的13.4倍,发光颜色由黄白变为蓝白。A novel Ca10Li( PO4)7∶ Dy3+phosphor was prepared by solid state reaction method,and its luminescence properties were studied. XRD results showed that 1 050 ℃ was a suitable sintered temperature for preparation of Ca10Li( PO4)7∶ Dy3 +phosphors. The main excitation peaks were located at 349 nm(6H15 /2→6P7 /2),363 nm(6H15 /2→6P5 /2) and 385 nm(6H15 /2→6M21 /2). The sample can be excited by UV-LED. The emission spectra composed two peaks,which were located at481 nm( blue) and 572 nm( yellow),corresponding to the4F9 /2→6H15 /2、6H13 /2typical transition of Dy3+. The influence of doped Dy3+concentration on the luminescent intensity of Ca10Li( PO4)7∶Dy3 +was investigated. The relative intensity of Ca10Li( PO4)7∶ Dy3+sample reached the maximum value when Dy3+mole fraction was 10%. The intensities increased with Ce3+mole fraction. The relative intensity of the sample reached the maximum value when Dy3+mole fraction was 10%,Ce3+mole fraction was 14%. The intensity is 13. 4 times higher than the original. The color of the phosphor was changed from yellow-white to blue-white.

关 键 词：Ca10Li(PO4)7∶Dy3+ Ce3+ 发光 浓度猝灭 能量传递 

分 类 号：O482.31[理学—固体物理]