摘要
研究了MAl2O4∶Eu2+(M=Ca,Sr,Ba)磷光体的制备过程,通过向磷光体中引入微量Dy3+,B3+等添加剂离子,得到了发绿色光的超长余辉磷光体,余辉发光初始亮度达4.8cd·m-2,激发停止50h后,其余辉发光仍清晰可见。制备出发紫色光、蓝色光及黄色光的碱土金属铝酸盐系列长余辉磷光体。分析了各磷光体发射光谱、激发光谱及余辉发光,讨论了磷光体的光谱移动以及Eu2+在碱土金属铝酸盐中的发光。
The synthesis of MAl2O4∶Eu2+(M= Ca, Sr, Ba) phosphors was studied. The luminescence properties of greenemitting SrAl2O4∶Eu2+ phosphor with long afterglow was improved by introducing Dy3+, B3+ and Na+ into the phosphors. With its initial brightness of 4.8 cd·m-2, the afterglow of the phosphor is distinctly visible within 50 h after a full excitation. The purpleemitting, blueemitting and yellowemitting phosphors were also prepared. The emission spectra, excitation spectra and decay curves of some prepared phosphors were shown. The spectra shift and the luminescence of Eu2+ in the alkaline earth aluminate phosphors were discussed.
出处
《中国稀土学报》
CAS
CSCD
北大核心
2003年第2期205-208,共4页
Journal of the Chinese Society of Rare Earths
基金
辽宁省自然科学基金资助项目(9910300501)
关键词
功能材料
长余辉磷光体
高温合成
多种发光颜色
碱土金属铝酸盐
填加剂
稀土
function material
phosphor with long afterglow
high temperature synthesis
manifold color-emitting
alkaline-earth metal aluminate
additive
rare earths
