Sr3Gd(PO4)3:Tm3+的真空紫外光谱特性

研究了Sr3Gd(PO4)3 : Tm3 和GdPO4 : Tm3 样品的结构特性、光谱特性.GdPO4 : Tm3 为单斜晶系,基质掺入铥离子后结构没有明显变化.GdPO4:Tm3 在164和210 nm附近有强烈的吸收峰.位于164 nm附近的强烈的吸收峰是归因于基质的吸收引起,210 nm附近的吸收峰则归因于Gd 的8S7/2-6GJ的能级跃迁.在164 nm真空紫外光激发下,样品于453及363 nm处有较强的发射峰,发射主峰位于453nm,属于Tm3 的1D2→3H4(22,123 cm-1)跃迁的典型发射.由于阳离子质量的不同,Sr3Gd(PO4)3:Tm3 在166 nm附近的激发峰高于GdPO4: Tm3 的同位置的激发峰,其在363 nm处的发射有明显减弱,而在453 nm处的蓝色发射有显著的增强.

VUV Spectral Properties of GdPO4: Tm3+ and Sr3Gd(PO4)3: Tm3+

GdPO4 : Tm3+ and Sr3Gd (PO4)3 : Tm3+ samples were prepared by solid state reaction. The properties of structure, VUV excitation and luminescence under VUV excitation were studied. GdPO4 : Tm3+ belongs to the monoclinic space group, and the crystal structure does not change as the crystal lattice is doped with Tm ions. The excitation spectra of GdPO4 : Tm3+ show strong absorption at 164 and 210 nm due the to host and the 8S(7/2)-6G(J) transition of Gd3+, respectively. The emission spectra of GdPO4 : Tm3+ reveal two intense and sharp emission peaks (453 nm and 363 nm) under 166 nm VUV excitation. The chief emission is at 453 nm from the typical Tm3+ D2 --> 3 H4 (22, 123 cm(-1) transition. The emission spectra of Sr3Gd (PO4)3 : Tm3+ at 363 nm is weakened, while the blue emission at 453 nm is strengthened because the excitation spectra of Sr3 Gd (PO4)3 : Tm3+ at 166 nm are higher than that of GdPO4 : Tm3+.