LaOBr:Tb3+，Dy3+的发光特性及高压研究

 采用高温常压方法合成了稀土发光材料LaOBr:Tb³⁺，Dy³⁺，采用高温高压方法对材料进行了处理，研究了高温高压处理前后样品发光特性的变化，并进行了发光衰减测量。结果表明，Dy³⁺的掺杂可以将Tb³⁺的⁵D₃能级的激发能有效地驰豫到⁵D₄能级，从而使⁵D₄~⁷F_J（J＝0, 1,…,6）的发射，尤其是⁵D₄~⁷F₅的发射明显增强，使得样品的发光亮度大大提高。Dy³⁺，Tb³⁺间存在交叉驰豫共振能量传递。高压处理过程引入的杂质、材料氧化及压致晶场变化都对材料的发光特性产生影响。

The Luminescence Properties and High Pressure Research of LaOBr:Tb3+, Dy3+

The rare earth luminescence materials LaOBr:Tb³⁺, Dy³⁺ were synthesized at high temperature, and were treated by high pressure (HP) combined with high temperature (HT). The luminescent properties of the samples before and after HP and HT treatment were studied. The results show that codoping Dy³⁺ makes the luminescence strength increased greatly, and energy transfer takes place between Tb³⁺ and Dy³⁺.