水热合成法制备CaTiO_3∶Re^(3+)(Re=Eu,Dy)及发光性能  

Luminescent Properties of CaTiO_3∶Re^(3+)( Re =Eu,Dy)Phosphors Prepared via Hydrothermal Process

作　　者：季洪雷[1,2,3] 米晓云 张鑫[1] 邵爽 张会玲[1] JI Hong-lei;MI Xiao-yun;ZHANG Xin;SHAO Shuang;ZHANG Hui-ling(School of Materials Science and Engineering,Changchun University of Science and Technology,Changchun 130022,China;University of Chinese Academy of Sciences,Ningbo 315201,China;TCL Multimedia Research and Development Center,Shenzhen 518067,China)

机构地区：[1]长春理工大学材料科学与工程学院,吉林长春130022 [2]中国科学院大学,浙江宁波315201 [3]TCL多媒体研发中心,广州深圳518067

出　　处：《发光学报》2018年第2期127-133,共7页Chinese Journal of Luminescence

基　　金：国家自然科学基金(51602027);吉林省教育厅项目(JJKH20170607KJ)资助~~

摘　　要：采用水热合成法合成了CaTiO_3∶Re^(3+)(Re=Eu,Dy)荧光粉,通过XRD(X-ray diffraction)、SEM(Scanning electron microscope)和光谱对样品进行了分析。研究发现在p H=12时,合成出的CaTiO_3∶Re荧光粉结晶度和发光性能最好;SEM分析表明荧光粉颗粒尺寸在450 nm左右,分散性好;确定了稀土离子最佳浓度。在353nm激发下,CaTiO_3∶0.12Dy^(3+)的发射峰分别位于485 nm(蓝)和576 nm(黄)。当Dy^(3+)浓度发生变化时,两种跃迁产生的蓝黄光发射峰的强度比值(IY/IB)也会发生变化,因此,可以利用这一点对CaTiO_3∶Dy^(3+)荧光材料的发光颜色进行调谐。CaTiO 3∶Re 3+(Re=Eu,Dy)phosphors were synthesized by hydrothermal method.XRD,SEM and PL spectra were used to characterize the samples.The crystallinity and luminescent properties of CaTiO 3∶Re 3+phosphors reach optimal state when pH=12,and SEM analysis indicates that the powder has good dispersion when the particle size is about 450 nm.The optimum concentration of rare earth ions is determined.The emission peaks of CaTiO 3∶0.12Dy 3+locate at 485 nm(blue)and 576 nm(yellow)under 353 nm excitation.The intensity ratio of the blue-yellow emission peaks(I Y/I B)produced by the two transitions can be regulated via adjusting Dy 3+concentration.Therefore,luminescent color of CaTiO 3∶Dy 3+phosphor can be tuned by changing Dy 3+concentration.

关 键 词：CATIO3 水热合成 发光 pH 

分 类 号：O482.31[理学—固体物理]