硅酸盐学报2011，Vol.39Issue(2)：210-214,5.
红色荧光粉Ca2La8Si6O26:Eu的制备和性能
Synthesis and Luminescence Properties of Ca2La8Si6O26:Eu Red Phosphors
姜洪义 1程素芬 1姬同坤1
作者信息
- 1. 武汉理工大学材料科学与工程学院,武汉430070
- 折叠
摘要
Abstract
A novel red emitting phosphor Ca2La8Si6O26:Eu was synthesized by the conventional solid-state reaction route. The samples were characterized by X-ray diffraction, scanning electron microscopy and fluorescent spectrum measurement. The results show that these materials belong to hexagonal crystal system and the main emission peak of the samples locates at 614 nm (corresponding to the 5D0→7F2 transition of Eu3+). These phosphors can be excited by ultraviolet light (394 nm) and blue light (464 nm) effectively,which indicates that Ca2La8Si6O26:Eu is a good light-conversion red phosphor candidate for the widely applied output wavelengths of ultraviolet or blue light-emitting diode (LED) chips. The luminescence properties and crystal structures of red phosphors prepared under different synthesis conditions were investigated. It is found that the Ca2(La0.9Eu0.1)8Si6O26 phosphor calcined at 1450 ℃ for 4h has the best luminescence properties. Taking 4.5％ (mole fraction) Li2CO3 as flux, or making raw materials to be precalcined at 800-1 000 ℃ for 2-4 h, the luminescence properties of Ca2La8Si6O26:Eu phosphors calcined at 1 450 ℃ for 4 h can be improved significantly.关键词
白光发光二极管/红色荧光粉/硅酸镧钙/铕掺杂/发光性能Key words
white light-emitting diode/ red phosphor/ calcium lanthanum silicate/ europium doping/ luminescence properties分类
物理学引用本文复制引用
姜洪义,程素芬,姬同坤..红色荧光粉Ca2La8Si6O26:Eu的制备和性能[J].硅酸盐学报,2011,39(2):210-214,5.
