Pr3+、Tb3+共掺的NaGdF4和GdB3O6的VUV荧光性质

分别制备了单掺和双掺Pr³⁺和Tb³⁺的NaGdF₄和GdB₃O₆等材料,研究了其真空紫外荧光性质。发现在VUV光的激发下,Gd³⁺离子在Pr³⁺和Tb³⁺的能量传递过程中起着重要的作用。Gd³⁺离子不存在时,Pr³⁺和Tb³⁺之间没有明显的能量传递过程。当体系中加入Gd³⁺离子后,Pr³⁺将大部分能量传递给中间体Gd³⁺,Gd³⁺再将能量传递给Tb³⁺,实现了将Pr³⁺的近紫外光转化为Tb³⁺的绿色光的转换过程。

Luminescent Properties of NaGdF4 and GdB3O6 Co-doped with Pr3+ and Tb3+ under VUV Excitation

NaGdF4 and GdB3O6 doped with Pr3+ and/or Tb3+ were prepared and their VUV excited fluorescence properties were studied.Gd3+ plays an important role in the energy transfer process from Pr3+ to Tb3+ upon the excitation of VUV photons.No obvious energy transfer from Pr3+ to Tb3+ was observed in the absence of Gd3+;on the contrary,Pr3+ transfer most of the energy to Gd3+ after Gd3+ was added,then the energy was transferred from Gd3+ to Tb3+.So the conversion from the near ultraviolet emission of Pr3+ to the green emission of Tb3+ was realized.