摘要
采用溶胶-凝胶法制备了CaAl2SiO6∶Eu2+荧光粉,利用X射线衍射仪、荧光光谱仪、热分析仪对其结构和光学性质进行了研究.结果表明,样品经1 000℃CaAl2SiO6∶Eu2+荧光粉在430 nm附近的发光峰为Eu2+中心的4f65d1(t2g)→4f7(8S7/2)跃迁;随Eu2+离子浓度的增加,样品的发光强度先增加后降低,在Eu2+浓度为0.7 mol%时达到最大;CaAl2SiO6∶Eu2+系列荧光粉的激发峰波长在280~390 nm之内,可以作为一种新型的UV-LED用三基色荧光粉.
CaAl2SiO6 ： Eu^2＋ phosphors were prepared by the sol-gel method. The structure and optical properties of phosphors were studied by XRay diffraction （XRD）, fluorescence spectrophotometer and differential scanning calorimetry （DSC）. The results indicate that the crystal of CaAl2SiO6 formed when CaAl2SiO6 = Eu^2＋ were sintered at 1 000 ℃. The emission peak located at about 430 nm of CaAl2SiO6 ： Eu^2＋ originates from the transition 4f^65d^1 （t2g） → 4f^7 （8S7/2） of Eu^2- in CaAl2SiO6 phosphors. With the Eu^2＋ concentration increasing, the Luminous intensity of the samples increased firstly, and then decreased, when the concentration of Eu^2＋ was 0. 7 mol%, the Luminous intensity was maximum. The excitation peaks of CaAl2SiO6 ： Eu^2＋ phosphors are in the range of 280-390 nm, which can be used as a new type of UV-LED trichromatic fluorescent powder.
出处
《中国计量学院学报》
2008年第4期372-375,共4页
Journal of China Jiliang University
基金
教育部新世纪优秀人才支持计划(NECT-07-0786)
浙江省科技计划项目(No.2008C21153)
