Gd_(0.95)(BO_3)_x(VO_4)_(1–x):Eu_(0.05)^(3+)红色荧光粉的制备及其发光性能研究

Preparation and luminescent properties study of Gd_(0.95)(BO_3)_x(VO_4)_(1–x):Eu_(0.05)^(3+) red phosphors

采用共沉淀法制备了Gd0.95(BO3)x(VO4)1–x:Eu0.053+红色荧光粉体,利用X射线衍射仪和荧光分光光度计,较系统地研究了B3+掺杂量对荧光粉的晶体结构和发光性能的影响规律。结果表明,Gd0.95(BO3)x(VO4)1–x:Eu0.053+的晶体结构与GdVO4:Eu3+的相同,均为四方锆型。但由于B3+的半径比V5+的小,则B3+的掺杂会使荧光粉体的X射线衍射峰峰位出现稍微右移。与GdVO4:Eu3+相比,掺入适量B3+后荧光粉的发光强度显著提高,当x=0.6时,所得样品的发光强度最高,其最强的发射峰均来自Eu3+的5D0→7F2的红色光发射峰。

The Gd0.95（B03）x（VO4）1-x：Eu0.05^3＋ red phosphors were synthesized by co-precipitation reaction and the effects of B^3＋ doping content on the crystal structure and luminescent properties of the prepared phosphors were studied in detail by X-ray diffractometer and fluorescence spectrophotometer. The results show that the crystal structure of Gd0.95（BO3）x（VO4）1-x：Eu0.05^3＋ is tetragonal zirconia structure the same as that of GdVOa：Eu^3＋. But the corresponding XRD peaks positions of the prepared phosphors with B^3＋ shift slightly towards high diffraction angle because of the smaller ionic radius of B^3＋ than that of V^＋5. The luminescent intensity of prepared phosphors with appropriate amount of B^3＋ increases significantly compared with phosphors without B^3＋ and the luminescent intensity of the phosphors is the strongest at x=0.6. The emission peak with the strongest luminescent intensity for the phosphors is from ^5Do→^7F2 transition of Eu^3＋, which display bright red fluorescence.