白光LED用Ba_3La(PO_4)_3∶Dy^(3+)荧光粉的制备与发光性能  

Preparation and Luminescence Properties of Ba_3La(PO_4)_3∶Dy^(3+) Phosphor for White LEDs

作　　者：杨志平[1] 刘鹏飞[1] 宋延春[1] 韩月[1] 赵引红[1] 吕梁[2] 潘飞[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1期35-39,共5页Chinese Journal of Luminescence

基　　金：国家自然科学基金(50902042);河北省自然科学基金(F2009000217)资助项目

摘　　要：通过高温固相法合成了一系列Ba3La1-x(PO4)3∶xDy3+荧光粉材料。利用XRD测量样品的物相,结果显示样品为纯相Ba3La(PO4)3晶体。样品的激发光谱由一系列宽谱组成,峰值分别位于322,347,360,386,424,451 nm。在347 nm激发下,荧光粉在482 nm(4F9/2→6H15/2)和575 nm(4F9/2→6H13/2)处有很强的发射。研究了不同Dy3+掺杂浓度对样品发射光谱的影响,当Dy3+摩尔分数x=0.10时出现猝灭现象,浓度猝灭机理为电偶极-电偶极相互作用。确定了不同Dy3+掺杂浓度的Ba3La(PO4)3∶Dy3+的荧光寿命。Ba3La(PO4)3∶Dy3+荧光粉发射光谱的色坐标位于白光区域。A series of Ba3La1-x（PO4）3∶xDy3＋ phosphors were synthesized by a solid-state reaction method.The phase of the as-prepared samples were measured by X-ray diffraction pattern（XRD）,and the results showed that the samples were pure phase.The exciation spectrum includes a series of wide bands and the peaks which locate at 322,347,360,386,424,451 nm.The phosphor exhibits intense emission at 482 nm（4F9/2→6H15/2） and 575 nm（4F9/2→6H13/2） under 347 nm exciation.The effect of the doping concentration of Dy3＋ was investigated,the concentration quenching occurred when x=0.10 and the mechanism of concentration quenching was dipole-dipole interaction.The decay lifetime of different Dy3＋-doped concentrations of Ba3La（PO4）3∶Dy3＋ phosphors was confirmed.The chromaticity coordinates of Ba3La（PO4）3∶Dy3＋ phosphors were measured,which were in the white region.

关 键 词：发光 荧光粉 白光 Ba3La(PO4)3∶Dy3+ 

分 类 号：O482.31[理学—固体物理]