LiBaPO_4∶Eu^(3+)材料的制备及发光特性  

Preparation and Luminescent Properties of LiBaPO_4∶Eu^(3+) Phosphor

作　　者：李盼来[1] 王蕴珠[2] 王志军[1] 郭庆林[1] 杨志平[1] 

机构地区：[1]河北大学物理科学与技术学院,河北保定071002 [2]河北大学计算中心,河北保定071002

出　　处：《发光学报》2011年第7期665-669,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(E2009000209;E2010000283);河北省教育厅基金(2009313);发光与光信息技术教育部重点实验室研究基金(2010LOI12)资助项目

摘　　要：采用高温固相法制备了LiBaPO4∶Eu3+红色发光材料,研究了Eu3+掺杂浓度、电荷补偿剂等对材料发光性质的影响。结果显示,在401 nm近紫外光激发下,材料呈多峰发射,分别由Eu3+的5D0→7FJ(J=0,1,2,3,4)能级跃迁产生,主峰位于619 nm;监测619 nm发射峰,所得激发光谱由O2-→Eu3+电荷迁移带(200~350nm)和f-f高能级跃迁吸收带(350~450 nm)组成,主峰位于401 nm。改变Eu3+掺杂浓度,LiBaPO4∶Eu3+材料的发射强度随之改变,Eu3+摩尔分数为5%时,强度最大;依据Dexter理论,得出浓度猝灭机理为电偶极-电偶极相互作用;添加电荷补偿剂提高了LiBaPO4∶Eu3+材料的发射强度,且Li+和Cl-的效果最好。Eu3＋ activated LiBaPO4 phosphor with several emission peaks（589,594,619,655 and 692 nm）,under the near ultraviolet light（401 nm） was synthesized by the high temperature solid state reaction method.And the phase present of the phosphor was characterized by powder X-ray diffraction（XRD）,the spectrum of the phosphor was measured by a SHIMADZU RF-540 fluorescence spectrophotometer.It was found that the processing parameters,including the activator content and the charge compensator,affected the emission intensity and other luminescent properties.The emission intensity of LiBaPO4∶Eu3＋ phosphor reaches the maximum at 5% Eu3＋,and the concentration self-quenching mechanism is the d-d interaction by Dexter theory.When the charge compensator incorporated,the emission intensity of the phosphor can be enhanced.The results show that LiBaPO4∶Eu3＋ is a promising red phosphor for white LED.

关 键 词：白光LED LiBaPO4∶Eu3+ 发光特性 

分 类 号：O482.31[理学—固体物理]