M_3Gd(PO_4)_3:Tm^(3+)(M=Mg,Ca,Sr,Ba)真空紫外发光特性

VUV Luminescence Properties of M_3Gd(PO_4)_3:Tm^(3+)(M=Mg,Ca,Sr,Ba)

研究了M3Gd(PO4)3:Tm3+(M=Sr,Ba,Ca,Mg)样品的结构特性、发光特性。M3Gd(PO4)3:Tm3+属于立方晶系。基质掺入铥离子后其结构没有明显变化。M3Gd(PO4)3:Tm3+在166nm和210nm附近有强烈的吸收峰。位于166nm附近的强烈吸收峰归因于基质的强烈吸收,210nm附近的吸收峰则归因于Gd3+的8S7/2-6GJ的能级跃迁。在166nm真空紫外光激发下,样品在453nm及363nm处有较强的发射峰,发射主峰位于453nm。随着样品中阳离子的变化,M3Gd(PO4)3:Tm3+的激发峰发生强烈变化,从而导致其发射光谱有了较大变化。

The structure properties, luminescence properties of M3Gd（PO4）3：Tm^3＋（M=Mg,Ca,Sr,Ba） samples were studied. M3Gd（PO4）3：Tm^3＋ belongs to the cubic space group. The crystal structure seldom changes after Tm ions are doped to the crystal lattice. The excitation spectra of M3Gd（PO4）3：Tm^3＋ shows strong absorption peak in 166 nm and 210 nm due to host and the ^8S7/2-^6GJ transition of Gd^3＋. The emission spectra of samples have revealed two intense and sharp emission peaks （453 nm and 363 nm） under 166 nm VUV excitation. The chief emission peak is in 453 nm. With the changes of.cation in＇ the samples, the excitation spectra of M3Gd（PO4）3：Tm^3＋ has changed greatly, resulting in great changes in its emission spectra.