荧光体Ca_5(PO_3)_4F∶Re(Re=Ce,Tb)的VUV-vis发光特性

Luminescent properties of Ca_5(PO_3)_4F:Re(Re=Ce,Tb) under VUV-vis excitation

采用高温固相反应合成了Ca5(PO3)4F∶Re(Re=Ce,Tb)荧光体,并研究了其结构特性和真空紫外、紫外激发下的发光特性。在紫外激发下,Ca5(PO3)4F∶Re(Re=Ce,Tb)中Ce3+离子可以将吸收的能量直接传递给Tb3+离子,使得Tb3+的绿色发光强度大大增加。在真空紫外激发下,Tb3+离子将吸收的能量传递给Ce3+离子,使得Tb3+的绿色发光强度减弱。

Ca5 （PO3 ）4F doped Ce, Tb samples are prepared by the solid state reaction, and the properties of structure and hrrninescent properties under VUV-UV excitation are studied. Under UV excitation, the relative intensity of the phosphor becomes strengthened and the energy transfer of Ce3＋→Tb3＋ in luminescence process of Ca5 （ PO3 ） 4 F： Re （ Re = Ce, Tb） exists. Otherwise, under VUV excitation, the relative intensity of the phosphor becomes weakened, and the energy transfer of Ce3＋→Tb3＋ in luminescence process of Ca5 （ PO3 ）4F ： Re（ Re = Ce ,Tb） under 172 nm VUV excitation exists.