Zn_2SiO_4(ZnB_2O_4):Mn^(2+),Sm^(3+)发光材料的制备与荧光性能  

Fabrication and Luminescence Properties of Zn_2SiO_4(ZnB_2O_4)∶Mn^(2+),Sm^(3+) Phosphors

作　　者：张志伟[1] 张卫国[1] 牛少莉[1] 

机构地区：[1]河北科技师范学院,河北秦皇岛066600

出　　处：《发光学报》2011年第2期144-148,共5页Chinese Journal of Luminescence

基　　金：国家自然科学基金(50361003);河北科技师范学院创新团队基金资助项目

摘　　要：使用高温固相法首次合成了Zn2SiO4(ZnB2O4)∶Mn2+,Sm3+发光材料,探讨了烧结温度、Sm3+含量对样品荧光性能的影响。利用X射线衍射(XRD)、荧光光谱等分析手段对Zn2SiO4(ZnB2O4)∶Mn2+,Sm3+粉末的结构、发光性能进行了表征。确定了该荧光材料的最佳合成条件,离子掺杂浓度等。实验结果表明:组成为Zn2SiO4(ZnB2O4)∶1.2%Mn2+,8%Sm3+的样品在950℃还原气氛下烧结,发光强度最高;反应生成的ZnB2O4和掺杂Sm3+可以大幅提高材料发光强度。Zn2SiO4 （ZnB2O4）：Mn^2＋, Sm^3＋ phosphors was fabricated by solid reaction method. The influences of sintered temperature and Sm^3＋ content on the luminescence properties of Zn2SiO4 （ZnB2O4）：Mn^2＋, Sm^3＋ phosphors were studied. Powder structure and luminescence properties were characterized by means of XRD, excitation and emission spectra. The experimental results indicate that Zn2SiO4 （ZnB2O4）： Mn^2 ＋, Sm^3＋ has two excitation peaks at 220 nm and 250 nm, the luminescence intensity is the largest when the sintered temperature is at 950 ℃ in reducing atmosphere, and the emission peaks at 521 nm. The ZnB204 as a part of host produced in the reaction can improve the luminescence intensity. At 950 ℃, there are most ZnB2O4 reaction products, meanwhile, ZnB2O4 has the best crystalline properties. With the Sm^3＋ content increased, the phase is not changed, however, to a large extent, the luminescence intensity can be improved. When the Sm^3＋ mole fraction is 8%, the intensity is the most and 5 times stronger than that for 4% Sm^3＋ With the increasing of Sm^3＋ mole fraction, the luminescence emission peak has blue-shift from 540 nm to 521 nm.

关 键 词：Zn2SiO4(ZnB2O4):Mn2+ Sm3+ 发光材料 烧结温度 Sm3+含量 

分 类 号：O482.31[理学—固体物理]