Eu^(3+)-Bi^(3+)共掺杂Ca_(0.7)Sr_(0.3)MoO_4荧光粉发光性能的研究  

Luminescence investigation of Eu^(3+)-Bi^(3+) co-doped Ca_(0.7)Sr_(0.3)MoO_4 phosphor

作　　者：耿秀娟[1] 杨旭[1] 李梓杨 陈永杰[1] 杨英[1] 张学军[1] 

机构地区：[1]沈阳化工大学辽宁省稀土化学及应用重点实验室,辽宁沈阳110142

出　　处：《光电子．激光》2015年第5期905-909,共5页Journal of Optoelectronics·Laser

基　　金：辽宁自然科学基金(2013020082);辽宁省博士科研启动基金(20141079)资助项目

摘　　要：采用高温固相法制备了Ca0.7Sr0.18 MoO4:0.08Eu3+、Ca0.7Sr0.27 MoO4:0.02Bi 3+和Ca0.7Sr0.18-1.5 xMoO4:0.08Eu3+,xBi 3+红色荧光粉,考察Bi 3+浓度对荧光粉发光性能的影响以及Bi 3+与Eu3+间的能量传递。通过X射线衍射(XRD)以及荧光的激发、发射光谱对荧光粉样品进行表征。结果表明,制备的Ca0.7Sr0.15 MoO4:0.08Eu3+,0.02Bi 3+红色荧光粉属于白钨矿结构。在Ca0.7Sr0.15MoO4:0.08Eu3+,0.02Bi 3+红色荧光粉中,由于Bi 3+的掺杂将吸收的能量传递给激活离子Eu3+,其发光强度得到增强。当Bi 3+掺杂量x=0.02时,在312nm激发下,主发射峰在616nm处的相对发光强度最大,属于Eu3+的5D0→7F2跃迁,但掺杂浓度过高时会出现浓度猝灭现象,发光强度减弱。Red phosphors Ca0. r Sr0.18 MoO4 ： 0.08Eua＋ , Ca0. r Sr0. 27 MoO4 ： 0.02Bia＋ and Ca0.7 Sr0. 18-1. Sac MoO4：0.08Eua＋ ,xBia＋ were prepared by high temperature soli＆phase method reaction. The influence of the concentration of Bia＋ on the luminescent properties of phosphors. The phosphors are characterized by X-ray diffraction （XRD） and fluorescence spectrophotometer, and the luminescent properties are characterized by excitation spectra and emission spectra. The experimental results indicate that the phase structure of the phosphor Ca0.7 Sr0. is MoO4 ： 0.08Eua＋ , 0. 02Bia＋ is scheelite structure. Bia＋ ions can transfer the absorbed energy to Eua＋ ions in red phosphors of Ca0. r St0.15 MoO4：0.08Eua＋ ,0.02Bi3＋. When the doping mole fraction of Bia＋ is 0.02 ,the relative luminous intensity of 616 nm main emission peak is the maximum under the excitation of 312 nm,due to the 5 Do-＋7 F2 transition of Eu3＋. Howev- er, the phenomenon of concentration quenching occurs when Bia＋ doping concentration is higher. The lu- minescent performance of phosphors are reduced.

关 键 词：高温固相 发光性能 敏化发光 

分 类 号：O482.31[理学—固体物理]