白光LED用荧光粉Na3Ce(PO4)2∶Dy^3+ 的制备与发光性能  

Preparation and luminescent properties of Na 3Ce(PO 4)2∶Dy^3+phosphor for white LED

作　　者：刘丽艳 柴卿瑀 蔡吉泽 徐凤艳 LIU Liyan;CHAI Qingyu;CAI Jize;XU Fengyan(College of Chemistry and Chemical Engineering,Shenyang Normal University,Shenyang 110034,China)

机构地区：[1]沈阳师范大学化学化工学院,沈阳110034

出　　处：《沈阳师范大学学报（自然科学版）》2020年第2期103-107,共5页Journal of Shenyang Normal University:Natural Science Edition

基　　金：辽宁省科技厅自然科学基金资助项目(201602674);辽宁省教育厅高校重大科技平台能源与环境催化工程技术研究中心开放课题。

摘　　要：采用高温固相法合成了Na3Ce1-x(PO4)2∶xDy^3+系列白色荧光粉。利用X射线粉末衍射、荧光光谱和荧光寿命技术对样品进行了表征。实验结果表明,在313nm紫外光激发下,Na3Ce(PO4)2:∶Dy^3+显示了3个发射带:363nm的宽带发射可归属为Ce3+离子的4f05d1→4f1跃迁;483nm和575nm的2个窄带分别来自于Dy^3+的4F9/2→6H15/2和4F9/2→6H13/2跃迁。Na3Ce1-x(PO4)2∶xDy^3+(x=0.005~0.12)系列样品的发射峰形状并未随掺杂剂浓度的变化而改变。其强度在Dy^3+摩尔浓度等于0.01时达到最大值,进一步增加Dy^3+浓度将导致浓度猝灭现象发生。样品的荧光寿命随着Dy^3+掺杂浓度的增大而逐渐减小,表明Dy^3+离子之间存在能量传递现象。Na3Ce(PO4)2∶Dy^3+荧光粉的色坐标为(0.3429,0.3183),位于白光区域,是潜在的白光LED用荧光粉材料。A series of Na3Ce1-x(PO4)2∶xDy^3+ white phosphor was synthesized by high temperature solid state method in this work.X-ray powder diffraction,photoluminescence spectroscopy and luminescent lifetime was adopted to characterize these samples.Experimental results show that Na3Ce(PO4)2∶Dy^3+can exhibit three emission bands under the excitation of 313 nm including broad band at 363 nm corresponding to 4f 05d 1→4f 1 transitions of Ce 3+and narrow bands at 483 nm and 575 nm corresponding to 4F9/2→6H 15/2 and 4F 9/2→6H 13/2 transitions of Dy^3+,respectively.It is worthy noted that the emission peak shapes are independent to the dopant concentration.When the concentration of Dy^3+ reaches 0.01,the emission intensity of the phosphor gets to its maximum.If the concentration of Dy^3+ increases continually,concentration quenching will appear.The luminescent lifetime of samples decreases with the increase of Dy^3+ ion concentration,indicating energy transfer among Dy^3+ ions.The Commission Internationale de L Eclairage coordinates(CIE)of Na 3Ce(PO 4)2∶0.01Dy^3+ phosphor is(0.3429,0.3183),which is in the white light range,indicating the potential applications in white light LED display.

关 键 词：Na3Ce(PO4)2 白光 荧光材料 光谱性质 

分 类 号：O482.31[理学—固体物理] O614.33[理学—物理]