Eu^(3+)和Dy^(3+)共掺单基质Ba_2CaWO_6白色荧光粉的合成与发光性质  

Synthesis and Luminescence Properties of Eu^(3+)/Dy^(3+) Co-doped Single-phased Ba_2CaWO_6 Phosphors for White-light Applications

作　　者：黄军[1] 易双萍[1] 冼洁强 张璐[1] 

机构地区：[1]广东工业大学物理与光电工程学院,广东广州510006

出　　处：《广东工业大学学报》2016年第2期76-80,共5页Journal of Guangdong University of Technology

基　　金：广东省产学研结合资助项目(2012B09110044);广东省自然科学基金资助项目(9151009001000052)

摘　　要：通过高温固相法合成了Eu^(3+)和Dy^(3+)共掺杂的单一相Ba_2CaWO_6的荧光粉.通过XRD和扫描电镜分析了Ba_2CaWO_6荧光粉的晶相和形貌结构.Ba_2CaWO_6:Eu^(3+)荧光粉因为5D0-7F1/7F2的能量跃迁发射很强的红光,而Ba_2CaWO_6:Dy^(3+)荧光粉因为4F9/2-6H15/2和4F9/2-6H13/2的能量跃迁分别发蓝光和黄光.Eu^(3+)/Dy^(3+)共掺杂的Ba_2CaWO_6荧光粉发射暖白光.Dy^(3+)到Eu^(3+)的能量传递通过发光光谱强度来研究.通过调控Dy^(3+)和Eu^(3+)的掺杂比例可以对Ba_2CaWO_6:Dy^(3+),Eu^(3+)样品的色坐标进行有效地调节,测试的色坐标表明Ba_2CaWO_6:Eu^(3+)/Dy^(3+)很适合紫外激发的白光LED荧光粉.Dy（3＋） ,Eu（3＋） ,and Dy（3＋） -Eu（3＋） doped Ba2CaWO6phosphors are synthesized by solid-state method. The structural and morphological studies of the Ba2CaWO6phosphors are conducted by measuring Xray diffraction pattern and scanning electron microscope images. The photoluminescence（ PL） spectra of the Ba2CaWO6： Eu（3＋） phosphor exhibit the intense red emission due to the transition of5D0-7F1/7F2 while the Ba2CaWO6： Dy（3＋） phosphor shows the blue（4F9 /2-6H15 /2） and yellow（4F9 /2-6H13 /2） emissions. The Eu（3＋） / Dy（3＋） ions co-doped Ba2CaWO6phosphor shows the improved white light by shifting towards the warm white region. The energy transfer from Dy（3＋） to Eu（3＋） ions is investigated by means of PL intensities.The luminescence intensities and chromaticity coordinates can be modified by controlling the concentration and the ration of doping Dy（3＋） and Eu（3＋） . The calculated chromaticity coordinates indicate that Ba2CaWO6： Eu（3＋） / Dy（3＋） phosphors may be suitable for the fabrication of near-UV excitation-based white light-emitting diodes.

关 键 词：发光 能量传递 Dy3+-Eu3+ Ba2CaWO6 

分 类 号：TQ586.1[化学工程—精细化工]