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La2?x?yMgTiO6:xBi3+,yEu3+荧光粉的性能和能量传递
作者:谢会东???苏彬彬???陈利君?赵亚娟?
单位:(西安建筑科技大学化学与化工学院?西安?710055)?
关键词:发光二极管?高温固相法?双钙钛矿?钛酸盐?
分类号:O614.33+1; O614.41
出版年,卷(期):页码:2019,47(8):0-0
DOI:
摘要:

?采用高温固相法合成La2?xMgTiO6:xBi3+和La1.8?yMgTiO6:0.2Bi3+,yEu3+系列荧光粉,用X射线衍射对其物相进行表征,测试荧光粉的荧光光谱和寿命,研究Bi3+和Eu3+掺杂量和发光强度之间的关系,以及Bi3+和Eu3+之间的能量传递机理和能量传递效率。结果表明:所有合成的掺杂荧光粉均为单相物质;La1.8?yMgTiO6:0.2Bi3+,yEu3+显示出Bi3+的蓝光发射和Eu3+的特征红光发射;当y=0.2时,La1.6MgTiO6:0.2Bi3+,0.2Eu3+的能量传递效率最大,为19.2%;能量传递机理为d?d相互作用。改变Eu3+的浓度可以得到从蓝光到橙红光颜色可调的荧光粉。La1.6MgTiO6:0.2Bi3+,0.2Eu3+的色坐标为(0.5385,0.2736)。

基金项目:
陕西省自然科学基金项目(2018JM2022)。
作者简介:
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