欢迎登录材料期刊网

材料期刊网

高级检索

采用高温还原法合成了Eu, Ti共激活橙红色Y2O2S长余辉发光材料, 并测量Y2O2S:0.03Eu,0.03Ti磷光体的荧光光谱, 余辉分辨和余辉衰减曲线谱. 实验结果表明, Y2O2S:0.03Eu,0.03Ti磷光体的发射谱由一系列Eu3+离子内部能级跃迁的尖峰组成; 余辉分辨谱则不同, 由一个主峰位于565nm的宽发射带和一系列波长范围位于500nm以上的窄发射带两种峰形组成, 可分别归为Ti离子的宽带余辉发射和三价Eu3+的线状余辉发射. 分析认为, 样品中存在Ti余辉发射向Eu3+内部能级间产生选择性的余辉传能机制, 从而导致Y2O2S:0.03Ti,0.03Eu磷光体中同时出现两种发光中心离子的余辉分辨谱现象.

A new kind of orange-red long afterglow Eu and Ti co-doped Y2O2S phosphor was synthesized via a traditional solid state reaction method under reducing atmosphere of CO. The photoluminescence spectrum, afterglow time-resumed spectrum and afterglow decay curve of the Y2O2S:0.03Ti,0.03Eu phosphors were measured. The result shows that the emission spectrum of Y2O2S:0.03Ti,0.03Eu consists of a group of narrow linear peaks from charge transmission of Eu3+. The orange-red afterglow was observed in present phosphors with two different luminescence centers: a broad yellow emission band around 565nm related to Ti emission and a group of narrow peaks of Eu3+ emission in the longer wavelength range. The afterglow mechanism of Eu3+ emission was suggested to come from the energy transfer process from Ti afterglow emission to Eu ions, and result in two different afterglow centers of Ti afterglow emission and Eu{3+} afterglow emission in present Y2O2S:0.03Ti,0.03Eu phosphor.

参考文献

[1] Matsuzawa T, Aoki Y, Takeuchi N, \it et al. J. Electrochem. Soc., \rm 1996, \bf 143 (8): \rm 2670--2673.
[2] Jia D, Wang X, Kolk E, \it et al. Optics Communication, \rm 2002, \bf 204: \rm 247--251.
[3]Jia W, Yuan H, Holmstrom S, \it et al. J. Lumin., \rm 1999, \bf 83-84: \rm 465--469.
\re{[4]} Qiu J, Hirao K. \it Solid State Communications, \rm 1998, \bf 106: \rm 795--798.
\re{[5]} 孙家跃, 杜海燕, 胡文祥. 固体发光材料, 第一版. 北京: 化学工业?
出版社, 2003. 151--161.
\re{[6]} Zhang P Y, Wang M Q, Hong Z L, \it et al. J. Rare Earths, \rm 2004, \bf 22: \rm 75--78.
\re{[7]} 张朋越, 洪樟连, 黄秋平, 等(ZHANG Peng-Yue, {\it et al}). 硅?
酸盐学报(Journal of the Chinese Ceramic Society), 2005, \bf 33 (2): \rm 8--12.
\re{[8]} Zhang P Y, Hong Z L, Wang M Q, \it et al. J. Lumin., \rm 2005, \bf 113 (1-2): \rm 89--93.
\re{[9]} Imanaga S, Yokono S, Hoshina T. \it Jpn. J. Appl. Phys., \rm 1980, \bf 19: \rm 41--49.
\re{[10]} Fonger W H, Struck C W. \it J. Electrochem. Soc., \rm 1971, \bf 118 (2): \rm 273--280.
\re{[11]} Dexter D L, Schulman J H. \it J. Chem. Phys., \rm 1954, \bf 22: \rm 1063--1070.\newpage
上一张 下一张
上一张 下一张
计量
  • 下载量()
  • 访问量()
文章评分
  • 您的评分:
  • 1
    0%
  • 2
    0%
  • 3
    0%
  • 4
    0%
  • 5
    0%