Ca_3Y(AlO)_3(BO_3)_4:Tb^(3+)荧光粉的合成及发光性能的研究

Study on the Synthesis and luminescent properties of Ca_3Y(AlO)_3(BO_3)_4:Tb^(3+) phosphors

本文用高温固相法成功地合成了Ca3Y(AlO)3(BO3)4∶Tb3+绿色荧光粉。通过X射线粉末衍射仪(XRD)、荧光光谱分析、扫描电子显微镜对该荧光粉的结构、发光性能和颗粒粒度进行了表征。结果表明:该荧光粉具有单一的Ca3Y(AlO)3(BO3)4晶相,粒度满足商业用荧光粉的粒度要求,与Ca3Y(AlO)3(BO3)4基质不同的是该荧光粉在352 nm近紫外线的激发下呈现绿色发射,并有四个位于484、543、586和622 nm的主发射峰,分别对应于Tb3+的5D4→7F J(J=6,5,4,3)特征跃迁,并探讨了Tb3+的掺杂量对荧光粉发光性能的影响,以及该荧光粉的浓度猝灭机理。研究结果表明Ca3Y(AlO)3(BO3)4∶Tb3+绿色荧光粉是一种发光性能优异的荧光材料,具有广阔的应用前景。

Ca3Y（AlO）3（BO3）4 for the first time. Crystal ： Tb3＋ phosphors were successfully prepared at 1100 ℃ by conventional solid reaction structure, morphology and photoluminescent properties of the particles were examined, respectively. XRD results indicated that the pure Ca3Y（AlO）3（BO3）4 crystal structure was obtained at 1100 ℃ for all samples. The Ca3Y（AlO）3（BO3）4 ： Tb3＋ phosphors could excited effectively by 352 nm ultraviolet. The photoluminescence spectra showed that the Ca3Y（AlO）3（BO3）4 ： Tb3＋ phosphor emitted a green light. While excited under ultraviolet light, the phosphors exhibited the characteristic emission peaks of Tb3＋ at 484, 543, 586 and 622 nm, which was assigned to the 5D4→7F1（J=6, 5, 4, 3） electron transitions of Tb3＋. Otherwise, the effect of the technological conditions and Tb3＋ doping concentration on luminescent properties of Ca3Y（AlO）3（BO3）4：Tb3＋ phosphors was observed. The Ca3Y（AlO）3（BO3）4 ： Tb3＋ green emitting phosphor is a promising phosphor.