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应用科学学报 ›› 1996, Vol. 14 ›› Issue (1): 108-112.

• 论文 • 上一篇    下一篇

新型铝酸锶铕长余辉磷光体

陈暨耀, 宋庆梅   

  1. 复旦大学
  • 收稿日期:1994-03-01 修回日期:1995-03-15 出版日期:1996-03-31 发布日期:1996-03-31
  • 作者简介:陈暨耀:副教授,复旦大学材料科学系,上海 200433

A NEW TYPE PHOSPHOR SrAl2O4:Eu WITH LONG AFTERGROW LUMINESCENCE

CHEN JIYAO, SONG QINGMEI   

  1. Fudan University
  • Received:1994-03-01 Revised:1995-03-15 Online:1996-03-31 Published:1996-03-31

PDF

157

被引次数

42

摘要： 报道铕激活的铝酸锶新型长余辉磷光体.由X射线粉末衍射法测量,该磷光体为SrAl2O4单斜晶体结构.激发光谱与发射光谱的测量表明,其发光属于典型的En￣2+d-f跃迁.经紫外光激发后,其余辉发光可达10小时以上,余辉衰减呈双曲线型,具有复合发光的特征.热释光谱的测量表明,磷光体中存在电子陷阱能级,而热释光峰值温度分别为333°K及378°K.进一步的实验分析揭示,磷光体中的杂质Mg加强了杂质陷阱能级,导致了磷光体的长余辉发光.

关键词: 热释光, 磷光体, 余辉

Abstract: A new type phosphor SrAl2O4:Eu with long persistent aftergrow in the system of SrO-Al2O3 was reported in this paper.The phosphor was found in the SrAl2O4 monoclinic crystal structure as measured by X-ray powder diffraction.The luminescence of phosphor was the typical d-f transition of Eu2+, according to the excitation spectrum and emission spectrum. After excitation by the UV fluorescent lamp, the aftergrow luminescence of phosphor could last 10 h with a hyperbola type decay, showing the characteristic of recombination luminescence.The measurements of thermoluminescence spectra showed that there were two thermoluminescence peaks lying at 333°K and 378°K, reflecting that the electron traps existed in the Phosphor. furthermore,experiments exhibited that the impurity component Mg formed the electron traps and made the phosphor possess the long aftergrow luminescence property.

Key words: thermoluminescence, phosphor, aftergrow