【摘要】 采用共沉淀法合成了红色荧光粉Sr1-x-yMoO4∶Eu3x+,Gd3y+,分别对样品进行了X射线衍射(XRD)分析、扫面电镜(SEM)和荧光光谱(PL)的测定。结果表明:所合成的样品均为单一纯相四方晶系结构,添加Gd3+(为0.35mol时)使主衍射峰的位置右移了0.35°;SEM照片显示:SrMoO4∶Eu3+和SrMoO4∶Eu3+,Gd3+颗粒尺寸分布相对均匀,为类方块状,颗粒大小约为1～3μm;Gd3+和Eu3+的共掺得到的SrMoO4∶Eu3+,Gd3+在616 nm处主发射峰的发光强度约是SrMoO4∶Eu3+的2.09倍;当掺杂x=0.25 mol和y=0.35 mol时,在近紫外光(395 nm)激发下,SrMoO4∶Eu3+,Gd3+得到616 nm处红光发射极峰。更多还原

【Abstract】 A novel red emitting phosphor Sr1-x-yMoO4∶ Eu3+x,Gd3+y was successfully synthesized by co-precipitation method.The crystal structure,morphology and luminescent properties of samples were characterized by X-ray diffraction(XRD),scanning electron microscope(SEM),and photoluminescence spectrophotometer(PL).The results indicated that all the phosphor are isostructural and share a tetragonal scheelite structure of space group I41/a88;After adding Gd3+(y=0.35 mol),it is found the main diffraction peak position shifted to the right of 0.35°.The results of SEM show that the particles size of SrMoO4∶ Eu3+ and SrMoO4∶ Eu3+,Gd3+ is relatively uniform,displays the blocks structure of regular shape,which size is about 1-3 μm;Under 395 nm,it is found that the luminescent intensity of SrMoO4∶ Eu3+,Gd3+ is about 2.09 times higher than that of SrMoO4∶ Eu3+ phosphor;the main emission spectrum peak at 616 nm achieves the maximum in Eu3+ and Gd3+ co-doped SrMoO4 phosphor when x=0.25 mol and y=0.35 mol.更多还原