Bi3+掺杂蓝色荧光粉GdVO4:Tm3+的发光性能

Luminescence Properties of Bi3+-Doped GdVO4:Tm3+ Blue Phosphors

摘要:

采用共沉淀法制备了Bi3+掺杂的GdVO4:Tm3+荧光粉材料。采用X射线衍射仪（XRD）、扫描电镜（SEM）、荧光光谱仪（PL）对所得荧光粉的晶体结构，颗粒形貌以及发光特性进行了分析。结果表明：Bi3+的掺入不改变GdVO4相的晶体结构，所得的Gd0.99-xVO4:Tm0.013+，Bix3+荧光粉的相结构仍为四方锆型结构。荧光粉体的形貌呈现尺度较均匀的颗粒状，颗粒尺寸约为70 nm。Bi3+的掺入增强了Gd0.99-xVO4:Tm0.013+, Bix3+荧光粉的发光强度，当Bi3+/Tm3+为0.5时，发光强度在波长为476 nm处达到最大值，显示为明亮的篮光。

Abstract:

The Bi3+-doped GdVO4:Tm3+ Blue Phosphors were synthesized by co-precipitation method. The crystal structure, the morphology and the luminescence properties of the (Gd, Bi)VO4:Tm3+ Blue Phosphors were investigated by X-ray Diffractometer (XRD), Scanning Electron Microscopy (SEM) and Fluorescence Spectrophotometer (PL). The results show that the crystal structure of the prepared Gd0.99-xVO4:Tm0.013+, Bix3+ phosphors is a tetragonal zircon type structure as same as GdVO4:Tm3+ phosphor. Nevertheless, the crystal structure of GdVO4:Tm3+ is not changed with Bi3+-doping. The SEM image reveals Gd0.99-xVO4:Tm0.013+, Bix3+ phosphor powders are composed of relatively uniform particles and its particle average size is about 70 nm. The photoluminescence intensity of （Gd, Bi）VO4:Tm3+ phosphor is enhanced by Bi3+ doping. When the concentration rate of Bi3+/Tm3+=0.5, the maximum photoluminescence intensity can be achieved at wavelengths 417 nm and the bright blue luminescence is displayed.