采用高温固相法制备了Na8.33La1.67(SiO4)6O2∶Eu3+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Na8.33La1.67(SiO4)6O2∶Eu3+呈多峰发射, 分别对应于Eu3+的5D0-7Fj(j=0,1,2,3,4)能级跃迁, 主峰是位于615 nm的5D0-7F2跃迁发射。研究了Eu3+掺杂浓度对材料发光性质的影响, 改变Eu3+掺杂浓度, 样品的发射强度随之改变, Na8.33La1.67(SiO4)6O2∶Eu3+材料的Eu3+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Eu3+离子能量弥散的主要原因是离子间交换相互作用。

Europium(Ⅲ)-doped Na8.33La1.67(SiO4)6O2 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 Na8.33La1.67-(SiO4)6O2∶Eu3+cover some sharp lines corresponding to the transitions of 5D0-7Fj(j=0, 1, 2, 3, 4), with the highest intensity at 615 nm ascribed to the transition of 5D0-7F2. Moreover, the emission intensity changes with the concentration of Eu3+. As the concentration is 15%, the optimal emission is obtained, which is concentration quenching. The phenomenon is due to the energy migration between Eu3+ ions. And the interaction mechanism between Eu3+ ions is calculated, which is exchange interaction.