摘要
采用高温固相还原法合成Ca_(12-x-y)M_xAl_(14)O_(32)F)2∶yEu(M=Mg,Sr,Ba)体系荧光粉,分别采用X射线粉末衍射仪和荧光光谱仪测试其物相及荧光性能,通过掺杂碱土金属离子可以调整Ca_(12)Al_(14)O_(32)F_2∶Eu^(3+)/Eu^(2+)的组成和结构,进而影响Ca_(12-x-y)M_xAl_(14)O_(32)F_2∶yEu的发光性能。研究结果表明:在Ca_(12)Al_(14)O_(32)F_2∶Eu中掺杂一定浓度的Mg^(2+)不利于Eu^(3+)的还原,掺杂一定浓度的Sr^(2+)或Ba^(2+)有利于Eu^(3+)的还原;通过改变碱土金属离子的掺杂浓度调节Eu^(3+)和Eu^(2+)的浓度比,可以调整蓝光发射和红光发射的强度比,进而使发光颜色从蓝色变为淡紫色,再变为蓝绿色。
A series of phosphors Ca（12-x-y）MxAl（14）O（32）F2∶yEu（M = Mg,Sr,Ba）are synthesized by the high temperature solid-state reaction,and their phases and fluorescence properties are tested by using X-ray powder diffractometer and fluorescent spectroscope.The composition and structure of Ca（12）Al（14）O（32）F2∶Eu^3＋/Eu^2＋ can be adjusted by doping alkaline metal ions,and the luminescent properties of Ca（12-x-y）MxAl（14）O（32）F2∶yEu（M=Mg,Sr,Ba）are affected.The results show that doping Mg^2＋ in Ca（12）Al（14）O（32）F2∶Eu is not conducive to the reduction of Eu^3＋,but doping Sr^2＋or Ba^2＋is helpful for the reduction of Eu^3＋.Adjusting the concentration ratio of Eu^3＋to Eu^2＋by changing the doping concentration of alkaline earth metal ions,the intensity ratio of blue to red can be adjusted,and the color of the samples can be adjusted from blue to lavender,and to bluish green.
作者
陈彩花
杨国辉
蒙丽丽
张丽霞
梁利芳
Chen Caihua;Yang Guohui;Meng Lili;Zhang Lixia;Liang Lifang(College of Chemistry and Materials Science, Guangxi Teachers Education University, Nanning, Guangxi 530001, China)
出处
《光学学报》
EI
CAS
CSCD
北大核心
2017年第10期328-334,共7页
Acta Optica Sinica
基金
国家自然科学基金(21161004)
广西自然科学基金(2011GXNSFA018048)
