【摘要】 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210nm附近有强烈的吸收峰。位于164nm附近的强烈的吸收峰是归因于基质的吸收引起,210nm附近的吸收峰则归因于Gd3+的8S7/2—6GJ的能级跃迁。在164nm真空紫外光激发下,样品于453及363nm处有较强的发射峰,发射主峰位于453nm,属于Tm3+的1D2→3H4(22,123cm-1)跃迁的典型发射。由于阳离子质量的不同,Sr3Gd(PO4)3∶Tm3+在166nm附近的激发峰高于GdPO4∶Tm3+的同位置的激发峰,其在363nm处的发射有明显减弱,而在453nm处的蓝色发射有显著的增强。更多还原

【Abstract】 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 8S7/2—6GJ 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+ 1D2→3H4 (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 Sr3Gd(PO4)3∶Tm3+ at 166 nm are higher than that of GdPO4∶Tm3+.更多还原