SrAl_2O_4:Eu^(2+),RE^(3+)长余辉发光材料的微波合成及其发光特性  

Microwave Synthesis of Long-lasting Phosphorescence SrAl_2O_4:Eu^(2+),RE^(3+) and Its Luminescent Properties

作　　者：宋会花[1] 刘文芳[1] 高元哲[1] 

机构地区：[1]河北师范大学化学与材料科学学院,石家庄050016

出　　处：《人工晶体学报》2008年第2期327-331,315,共6页Journal of Synthetic Crystals

基　　金：河北师范大学博士基金(No.103261);国家自然科学基金(No.20601007);河北省教育厅基金(ZH2006002)

摘　　要：用微波法合成了SrAl2O4:Eu2+,RE3+(RE3+=Er3+,Dy3+,Ho3+,Nd3+,Sm3+,Ce3+,Gd3+)系列长余辉发光材料。XRD结果表明:所得发光材料为α-SrAl2O4。激发光谱、发射光谱结果表明:RE3+的掺杂不改变材料的主发射峰位置,在室温下观察到了SrAl2O4:Eu2+,RE3+(RE3+=Er3+,Dy3+,Ho3+,Nd3+)的绿色上转换发光。余辉衰减曲线和热释光谱结果显示:余辉的初始亮度最高,时间最长,热释峰的温度最接近室温的是SrAl2O4:Eu2+,Nd3+。Long persistent phosphorescence SrAl2O4 ： Eu2 ＋ , RE3 ＋ （ RE3 ＋ = Er3＋, Dy3 ＋ , Ho3 ＋, Nd3 ＋, Sm3＋ ,Ce3 ＋ , Gd3＋ ）was synthesized by microwave radiation method. XRD analysis showed that crystal structure of phosphor is α phase SrAl2O4. The results of the spectroscopic analysis for the excitation and emission spectrum indicate that the main peak of luminescence spectra does not change after doping the RE3＋ ions and SrAl2O4 ：Eu2＋ ,RE3＋ （RE3＋ = Er3＋ ,Dy3＋ ,Ho3＋ ,Nd3. ） show strong green up-conversion emission. The decay curve of fluorescence and the spectrum of thermoluminscent showed SrAl2O4 ： Eu2＋ , Nd3＋ have the merits of the highest initial luminescent intensity, the longest duration time, and the temperature of heating releasing peak closest to the room temperature.

关 键 词：铝酸锶 长余辉 微波合成 稀土 

分 类 号：O614[理学—无机化学]