白色荧光粉KCaY_(1-x)(PO_4)_2:xDy^(3+)的制备及真空紫外发光特性  

A Novel Dy^(3+)-Doped KCaY(PO_4)_2 White-Light Phosphors under VUV Excitation for Hg-Free Lamps Application

作　　者：张锂[1] 韩国才[2] 

机构地区：[1]兰州工业学院基础学科部,甘肃兰州730050 [2]兰州工业学院材料工程学院,甘肃兰州730050

出　　处：《中国稀土学报》2015年第6期657-662,共6页Journal of the Chinese Society of Rare Earths

基　　金：国家自然科学基金青年项目(502041032)资助

摘　　要：一种新型具有六方晶系的KCaY_(1-x)(PO_4)_2:xDy^(3+)(0<x≤0.10)白色荧光粉采用固相法被成功合成,研究了其在真空紫外激发下的发光特性。结果表明,在147 nm激发下,样品主要呈现472 nm的蓝色和578 nm的黄色发射,在578 nm监控下的激发光谱表明基质和激活离子间存在着一定的能量转移现象,因此通过固相反应制备的单一体系单一激活离子的白色荧光粉KCaY_(1-x)(PO_4)_2:xDy^(3+)(0<x≤0.10)将在无汞荧光灯上有潜在的应用价值。Novel Dy3＋ -doped KCaY（ PO4 ）2 white light phosphors with hexagonal system were successfully synthe-sized by solid-state reaction. The luminescence properties of white-light KCaYt（PO4 ）2 ：xDy3＋ under Vacuum ul-traviolet （VUV） excitation were investigated. The strong absorption at around 147 nm in excitation spectrum energycould be transferred to the energy levels of Dyz ion from the host absorption. Additionally, the white light phos-phors were activated by a single Dy3＋ ion and with solid-state reaction. Therefore, the luminescence of KCaY（ PO4 ） 2 ： DY3 ＋ under VUV excitation was effective, and it was promising of being applied to mercury-free lamp.

关 键 词：真空紫外 白光荧光粉 固相反应 无汞荧光灯 稀土 

分 类 号：TN104.3[电子电信—物理电子学]