Zn2SiO4(ZnB2O4):Mn2+,Sm3+发光材料的制备与荧光性能

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、Sm2+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...

Fabrication and Luminescence Properties of Zn2SiO4(ZnB2O4):Mn2+,Sm3+ Phosphors

Zn₂SiO₄(ZnB₂O₄) ∶ Mn²⁺ ,Sm³⁺ phosphors was fabricated by solid reaction method. The influences of sintered temperature and Sm³⁺ content on the luminescence properties of Zn₂SiO₄(ZnB₂O₄) ∶ Mn²⁺ ,Sm³⁺ 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) ∶ Mn²⁺ ,Sm³⁺ 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 ZnB₂O₄ 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 Sm³⁺ content increased, the phase is not changed, however, to a large extent, the luminescence intensity can be improved. When the Sm³⁺ mole fraction is 8%, the intensity is the most and 5 times stronger than that for 4% Sm³⁺. With the increasing of Sm³⁺ mole fraction, the luminescence emission peak has blue-shift from 540 nm to 521 nm.