红色荧光粉Na_(8.33)La_(1.67)(SiO_4)_6O_2∶Eu^(3+)的制备及发光特性  

Synthesis and Luminescence Properties of Red Phosphor Na_(8. 33)La_(1. 67)(SiO_4)_6O_2∶Eu^(3+)

作　　者：金叶 陈远豪 刘浩文 姚静 JIN Ye;CHEN Yuan-hao;LIU Hao-wen;YAO Jing(School of Science,Chongqing University of Technology,Chongqing 400054,China)

机构地区：[1]重庆理工大学理学院,重庆400054

出　　处：《发光学报》2019年第2期159-163,共5页Chinese Journal of Luminescence

基　　金：重庆市科技计划(cstc2017jcyjA0925)资助项目~~

摘　　要：采用高温固相法制备了Na_(8. 33)La_(1. 67)(SiO_4)_6O_2∶Eu^(3+)红色发光材料,利用X射线衍射仪测定其晶体结构,利用Hitachi F4600表征其发光光谱。在紫外光激发下,样品Na_(8. 33)La_(1. 67)(SiO_4)_6O_2∶Eu^(3+)呈多峰发射,分别对应于Eu^(3+)的~5D_0-~7F_j(j=0,1,2,3,4)能级跃迁,主峰是位于615 nm的~5D_0-~7F_2跃迁发射。研究了Eu^(3+)掺杂浓度对材料发光性质的影响,改变Eu^(3+)掺杂浓度,样品的发射强度随之改变,Na_(8. 33)La_(1. 67)(SiO_4)_6O_2∶Eu^(3+)材料的Eu^(3+)浓度为15%时,发光强度最大。讨论了浓度猝灭的机理,理论计算表明引起Eu^(3+)离子能量弥散的主要原因是离子间交换相互作用。Europium(Ⅲ)-doped Na 8.33 La 1.67(SiO 4)6O 2 have been synthesized by solid stated method.The crystal structure has been detected by X-ray diffractometer and the photoluminescence properties have been obtained on Hitachi F4600.Under UV excitation,the emission of Na 8.33 La 1.67-(SiO 4)6O 2∶Eu^3+cover some sharp lines corresponding to the transitions of 5D 0-7F j(j=0,1,2,3,4),with the highest intensity at 615 nm ascribed to the transition of 5D 0-7F 2.Moreover,the emission intensity changes with the concentration of Eu^3+.As the concentration is 15%,the optimal emission is obtained,which is concentration quenching.The phenomenon is due to the energy migration between Eu^3+ions.And the interaction mechanism between Eu^3+ions is calculated,which is exchange interaction.

关 键 词：红色荧光粉 固相法 能量弥散 白光LED Na8.33La1.67(SiO4)6O2∶Eu^3+ 

分 类 号：O482.31[理学—固体物理]