硼酸对亚微米级Ca_3Sc_2Si_3O_(12):Ce绿色荧光粉的制备及发光性能的影响  

Effect of H_3 BO_3 on preparation and luminescence properties of submicron green-emitting Ca_3 Sc_2 Si_3 O_(12) ∶ Ce phosphor

作　　者：刘元红[1] 庄卫东[1] 高文贵[1] 胡运生[1] 何涛[1] 何华强[1] 

机构地区：[1]北京有色金属研究总院稀土材料国家工程研究中心,有研稀土新材料股份有限公司,北京100088

出　　处：《物理学报》2010年第11期8200-8204,共5页Acta Physica Sinica

基　　金：国家科技部(批准号:2006CB601104;2006AA03A133);工信部(半导体照明器件研发及产业化)资助的课题~~

摘　　要：采用凝胶-燃烧法合成了Ca3Sc2Si3O12∶Ce绿色LED用荧光粉,用X射线粉末衍射(XRD)、扫描电镜(SEM)、荧光光谱仪等对合成产物进行了分析和表征.结果表明:通过添加H3BO3做助熔剂,制得的荧光粉晶相纯正,颗粒形貌均呈现为较规则的类球形,而且所得荧光粉的粒径均小于1μm.发射光谱呈现为一宽带,发射主峰位于505nm,该宽峰对应于Ce3+离子的5d-2F5/2及5d-2F7/2能级跃迁.Ce3+的最佳掺杂浓度为x=0.1.Ca3Sc2Si3O12∶Ce的热稳定及相对发光强相对于YAG∶Ce有明显改善.Green-emitting Ca3Sc2Si3O12： Ce3 ＋ phosphors for white LED are successfully synthesized by a gel-combustion method.The as-synthesized phosphors are investigated by XRD,SEM,and fluorescence spectrophotometer.The results indicate that the crystal structure of the phosphor is pure.The particle morphology of the sample is basically spherical in shape.The particle size is smaller than 1μm.The emission spectrum shows a broad band emission,and the main emission peak locates at 505 nm.Bright green-emission broadening is attributed to the characteristic emissions 5d-2F5/2 and 5d-2F7/2 transitions of Ce3 ＋ .The optimal doping concentration of Ce in Ca3-xSc2Si3O12：Ce is x = 0.1.The thermal stability and the luminescence intensity of the Ca3Sc2Si3O12：Ce3 ＋ are significantly improved compare with those of YAG：Ce.

关 键 词：白光LED 荧光粉 Ca3Sc2Si3O12∶Ce 发光 

分 类 号：O482.31[理学—固体物理] TN104.3[理学—物理]