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Dy^3＋/Nd^3＋掺杂对Sr4Al14O25：Eu^2＋陷阱能级的影响
  • ISSN号：1000-3290
  • 期刊名称：《物理学报》
  • 时间：0
  • 分类：TB34[一般工业技术—材料科学与工程]
  • 作者机构：[1]广东工业大学物理与光电工程学院,广州510006
  • 相关基金：国家自然科学基金（批准号：20671022 20871033）资助的课题
作者： 邓柳咏[1], 胡义华[1], 王银海[1], 吴浩怡[1], 谢伟[1]
关键词： 陷阱能级, Sr4Al14O25:Eu^2+, 热释光, trap level, Sr4Al14O25：Eu^2 ＋ , thermoluminescence
中文摘要：

采用高温固相法合成了Sr4Al14O25：Eu^2＋,Sr4Al14O25：Eu^2＋,Dy^3＋和Sr4Al14O25：Eu^2＋,Nd^3＋材料,研究了Dy^3＋或Nd3＋掺杂对Sr4Al14O25：Eu^2＋陷阱能级的影响.热释光谱对比显示,在Sr4Al14O25：Eu^2＋的热释光谱中,存在两个不同深度的陷阱能级;Dy^3＋掺杂提高了原有浅陷阱能级中被束缚电子的密度,从而显著提高了Sr4Al14O25：Eu^2＋的长余辉特性;Nd^3＋掺杂增加原有深陷阱能级中被束缚电子的密度.由于深陷阱能级不利于在室温下电子的逃逸,所以Nd^3＋掺杂不能提高Sr4Al14O25：Eu^2＋室温下的余辉特性.

英文摘要：

The Sr4Al14 O25：Eu^2 ＋ ,Sr4Al14 O25：Eu^2 ＋ ,Dy^3 ＋ and Sr4Al14 O25：Eu^2 ＋ ,Nd^3 ＋ samples were synthesized by the conventional solid state reaction method. The influence of doping of Dy^3 ＋ or Nd^3 ＋ on trap levels of Sr4Al14O25：Eu^2 ＋ were studied. The results indicated that there are two trap levels with different depths,as shown in the thermoluminescence spetra of Sr4Al14O25：Eu^2 ＋ ,and the shallow trap level is suitable for electrons to escape at room temperature. The dopant Dy^3 ＋ enhances the concentration of electrons trapped by the shallow trap levels,leading to the notable increase of afterglow of Sr4Al14O25：Eu^2 ＋. The concentration of electrons trapped by deep trap levels were is by doping with Nd^3 ＋. Since the deep trap level is not appropriate for electron to escape at room temperature,the dopant of Nd3 ＋ does not improve the room temperature afterglow.

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期刊信息
  • 《物理学报》
  • 北大核心期刊（2011版）
  • 主管单位:中国科学院
  • 主办单位:中国物理学会 中国科学院物理研究所
  • 主编：欧阳钟灿
  • 地址：北京603信箱(中国科学院物理研究所)
  • 邮编：100190
  • 邮箱：apsoffice@iphy.ac.cn
  • 电话：010-82649026
  • 国际标准刊号：ISSN：1000-3290
  • 国内统一刊号：ISSN：11-1958/O4
  • 邮发代号:2-425
  • 获奖情况:
  • 1999年首届国家期刊奖,2000年中科院优秀期刊特等奖,2001年科技期刊最高方阵队双高期刊居中国期刊第12位
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  • 被引量:49876