We synthesized Dy³⁺ doped SrLaGa₃O₇ phosphors via a sintering process at 1350 C under atmosphere. The X-ray diffraction data demonstrate that they have the pure tetragonal phase, meaning the successful substitution of Dy³⁺ in SrLaGa₃O₇ host. Monitoring at 572 nm, Dy³⁺ doped SrLaGa₃O₇ phosphors show a series of excitation bands within 275–475 nm. Exciting at 342 nm, Dy³⁺ doped SrLaGa₃O₇ phosphors show emission bands in the range of 450–700 nm. The emission bands respectively locate in blue, yellow and right light regions, which respectively correspond to ⁴F_9/2 → ⁶H_15/2, ⁴F_9/2 → ⁶H_13/2 and ⁴F_9/2 → ⁶H_11/2 transitions of Dy³⁺. The concentration quenching is induced by dipole-dipole interactions among neighboring Dy³⁺ ions. There is only one peak in the thermoluminescence glow curves of Dy³⁺ doped SrLaGa₃O₇ phosphors, indicating that there is only one type of trap center in these phosphors. The trap depth is calculated to be 0.754 eV.

我们在大气下于1350℃通过烧结工艺合成了掺Dy ^3+的SrLaGa ₃ O ₇荧光粉。X射线衍射数据表明它们具有纯正的四方相，意味着在SrLaGa ₃ O ₇主体中成功地置换了Dy ³⁺。在572 nm处监测，掺Dy ^3+的SrLaGa ₃ O ₇荧光粉在275–475 nm范围内显示出一系列激发带。Dy ³⁺掺杂的SrLaGa ₃ O ₇在342 nm处激发磷光体显示出450-700 nm范围内的发射带。发射带分别定位在蓝色，黄色和右光区域，其分别对应于⁴ ˚F _9/2 → ⁶ ħ _15/2，⁴ ˚F _9/2 → ⁶ ħ _13/2和⁴ ˚F _9/2 → ⁶ ħ Dy ^3+的_11/2跃迁。浓度猝灭是由相邻的Dy ³⁺离子之间的偶极-偶极相互作用引起的。Dy ³⁺掺杂SrLaGa ₃ O的热致发光辉光曲线中只有一个峰_7个磷光体，表明这些磷光体中只有一种陷阱中心。陷阱深度经计算为0.754 eV。