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用湿化学方法合成了Ce3+/Dy3+及Ce3+/Tb3+共掺GdAl3(BO3)4发光材料。利用X射线衍射仪对其进行了物相分析,结果表明:合成物为纯的六方相GdAl3(BO3)4微晶。利用荧光分光光谱仪进行光谱分析,测定了合成样品的激发和发射光谱。发现在紫外激发下,GdAl3(BO3)4:Dy荧光粉发射出很强的偏黄的白光,其发射峰分别位于480,575和665nm,对应于Dy3+的4F9/2→6H15/2,13/2,11/2跃迁。掺Ce3+对Dy3+起到敏化作用,GdAl3(BO3)4:Dy,Ce发出很亮的暖白光,且强度是GdAl3(BO3)4:Dy的3倍左右。同时,在Ce3+/Tb3+共掺的样品中,由于Ce3+与Tb3+间的能量传递,Tb3+的541nm特征峰显著增强。
Ce3 + / Dy3 + and Ce3 + / Tb3 + co-doped GdAl3 (BO3) 4 luminescent materials were synthesized by wet chemical method. The phase analysis was carried out by X-ray diffractometer. The results show that the composition is pure hexagonal phase GdAl3 (BO3) 4 crystallites. The spectra of the samples were measured by fluorescence spectroscopy. The excitation and emission spectra of the synthesized samples were measured. It was found that the GdAl3 (BO3) 4: Dy phosphor emits a strong yellowish white light with emission peaks at 480, 575 and 665 nm, corresponding to 4F9 / 2 → 6H15 / 2 and 13/2 of Dy3 + 11/2 transition. Ce3 + doped Dy3 + sensitized GdAl3 (BO3) 4: Dy, Ce emit very bright warm white light, and the intensity is GdAl3 (BO3) 4: Dy about 3 times. Meanwhile, in Ce3 + / Tb3 + co-doped samples, the 541nm characteristic peak of Tb3 + is significantly enhanced due to the energy transfer between Ce3 + and Tb3 +.