YVO4:Eu3+球形荧光粉的合成与发光性能优化

Preparation and Luminescence Optimization of YVO4:Eu3+ Spherical Phosphors

采用水热法合成了YVO4:Eu3+红色荧光粉。通过X射线粉末衍射(XRD)、扫描电镜(SEM)以及荧光光谱(PL)对荧光粉的晶体结构、形貌和发光性能进行表征。结果表明,在水热条件下合成了一系列四方锆石结构的Y1-xEuxVO4纳米晶,一次性粒径约为7nm,组装成球形形貌、分散性好、尺寸均一的颗粒,其平均粒径约为80nm。在316nm波长激发下,YVO4:Eu3+荧光粉最强发光峰位于619nm处,对应于Eu3+的5 D0→7F2电偶极跃迁,且Eu3+最佳摩尔分数为11%。

YVO4:Eu3+red phosphors were prepared by hydrothermal method.Their crystal structure,morphology and luminescence properties were characterized by X-ray powder diffraction(XRD),scanning electron microscopy(SEM)and photoluminescence spectroscopy(PL),respectively.The results showed that a series of Y1-xEuxVO4 nanoparticles with tetrahedral zircon structure were synthesized under hydrothermal conditions.The single particle sizes were about 7 nm and the particles with good dispersion and uniform sizes were assembled into spherical morphology.The average particle size was about 80 nm.The strongest luminescence intensity of YVO4:Eu3+phosphors was located at 619 nm(excitation wavelength:316 nm),corresponding to the 5 D0→7 F2 transition of Eu3+,and the optimum doping mole fraction of Eu3+was 11%.