项目名称: 新型碱土金属氯铝酸盐白色长余辉发光材料发光性能研究
项目编号: No.21261027
项目类型: 地区科学基金项目
立项/批准年度: 2013
项目学科: 数理科学和化学
项目作者: 汪正良
作者单位: 云南民族大学
项目金额: 48万元
中文摘要: 长余辉发光材料是一种节能、环保型材料,可被广泛应用于弱光照明、应急指示标志等领域。同单一颜色的长余辉发光材料相比,适用于弱光照明的白色长余辉发光材料的研制却刚刚起步。白色光可通过混合红、绿、蓝三基色发光材料得到,但这类方法用来制备白色长余辉发光材料存在很多技术难题:1)需要精确控制各荧光粉的比例;2)各荧光粉余辉时间、余辉亮度不同,导致荧光粉在其衰减过程中白光会偏色。而单一基色的白色长余辉发光材料则可以避免这些问题,故本项目提出研究新型单一基质的白色长余辉发光材料,开发出具有自主知识产权的夜间弱光照明用白色长余辉发光材料。主要研究内容:1)设计并合成新型Eu2+、Ce3+共掺杂的碱土金属氯铝酸盐系列白色长余辉发光材料,研究其发光性能;2)利用Dy3+、Nd3+等稀土离子延长碱土金属氯铝酸盐白色长余辉发光材料的余辉时间,并研究长余辉发光机理;3)白色长余辉发光材料在弱光照明上的应用研究。
中文关键词: 长余辉性能;荧光粉;碱土金属氯铝酸盐;发光性能;白光
英文摘要: The long afterglow phosphors are low power consumption and environment-friendly luminescent materials, which can be applied on illumination of weak light, emergency mark, etc. Little attention was paid on the white light long afterglow phosphors,compared with the single color long afterglow phosphors.In generally, the white light can be obtained by mix red, green and blue luminescent materials. However, this method shows the following shortcomings for pareparing the white light long afterglow phosphors:1) the ration of red, green and blue phosphors must be controlled very accurately;2) the white light will have some shift during the white light decays. In order to solve these problems, we raised to investigate one novel white light long afterglow phosphor. The research content consist of the following three parts: 1)To design and prepare the alkaline-earth chlorine aluminates phosphors doped with Eu2+ and Ce3+ ions, and investigate their photoluminescent properties;2)To prolong the afterglow time by introducing the Dy3+ or Nd3+ ions, and study the mechanism of long afterglow; 3)To investigate the application on illumination of weak light for the white light long afterglow phosphors.
英文关键词: Long afterglow properties;phosphors;alkaline earth chlorinealuminates;luminescent properties;white light