摘要
用高温固相反应法,分别在H2和CO还原气氛中制备了Sr1.94-x Bax MgSi2O7:Eu2+0.01,Dy3+0.05长余辉材料;研究了不同还原气氛对该系列荧光粉发光及余辉性能的影响。研究结果表明,随着Ba2+浓度的增加,荧光粉的晶体结构发生了改变,从而导致发射光谱和余辉光谱的峰位也发生了变化;CO还原气氛下所制备荧光粉的纯度要高于H2还原气氛下制备的样品,CO还原气氛下所制备荧光粉的余辉的初始亮度和衰减都明显优于H2还原条件下所制备的样品,说明CO还原条件下更容易形成具有合适浓度和深度陷阱的纯相荧光粉,有助于提高样品的余辉性能。
Persistent luminescence material Sr1.94-xBaxMgSi2O7：Eu^2＋0.01,Dy^3＋0.05was synthesized by solid- state reaction method in hydrogen reducting atmosphere and carbon monoxide reducting atmosphere, re- spectively. The impacts of reducing atmosphere on photoluminescence and persistent luminescence prop- erties are studied systematically. The results show that the crystal structures of these phosphors change with the increase of barium ion content, and then the change in crystal structures leads to the shift of the peaks of emission and persistent luminescence spectra. The phosphors synthesized by different reducting methods have some differences in crystal structure, photoluminescence and persistent luminescence prop- erties. The phosphors synthesized in carbon monoxide reducting atmosphere have higher purity than the samples synthesized in hydrogen reducting atmosphere. What is more, as for persistent luminescence properties,the phosphors synthesized in carbon monoxide reducting atmosphere have superior perform- ance in initial luminance and afterglow decay to the samples synthesized in hydrogen reducting atmos- phere. This result indicates that it is easier to synthesize pure phase phosphors with the traps which have appropriate concentration and depth by carbon monoxide reducting method and that is good for their per- sistent 1 properties.
出处
《光电子．激光》
EI
CAS
CSCD
北大核心
2014年第3期501-507,共7页
Journal of Optoelectronics·Laser
基金
贵州省科技计划支持项目(2012-3005,2010-4005,2009-15,2010-2134,2011-2016)
贵阳市科技计划(2012101-2-4)资助项目
关键词
长余辉材料
还原气氛
发光性能
persistent luminescence material
reducing atmosphere
luminescence properties
