...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Optical Materials >High quantum yield and low concentration quenching of Eu~(3+) emission in oxyfluoride glass with high BaF_2 and Al_2O_3 contents
【24h】

High quantum yield and low concentration quenching of Eu~(3+) emission in oxyfluoride glass with high BaF_2 and Al_2O_3 contents

机译：BaF_2和Al_2O_3含量高的氟氧化物玻璃中Eu〜（3+）的高量子产率和低浓度猝灭

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

New oxyfluoride glasses of 1Eu_2O_3-50BaF_2-xAl_2O_3-(50-x)B_2O_3 (x-0-25), yEu_2O_3-50BaF_2-25Al_2O_3-25B_2O_3 (y=0-10) (mol), and zEu_2O_3-1Tb_4O_7-50BaF_2-25Al_2O_3-25B_2O_3 (z=0, 0.5) (mol) with a high fluorine content (F/(F + 0) = 0.4) were synthesized by using a conventional melt-quenching method, and photoluminescence properties such as quantum yield (η), lifetime (τ), and concentration quenching effect of Eu~(3+) ions were clarified. The glass with 25Al_2O_3 showed an excellent red luminescence with extremely high quantum yield (η) of 97% in the visible region at the excitation of the wavelength λ = 396 nm and a long lifetime of t - 3.29 ms for the emission (λ - 612 nm) of Eu~(3+) ions at the ~5D_0 level. The effect of concentration quenching in these glasses was also very small, e.g., η = 72% even for the glass with 10Eu_2O_3. The values of η= 52% for the green emission of Tb~(3+) ions and of η = 81% for the yellow emission of Eu~(3+)-Tb~(3+) co-doped ions were also achieved in the glasses. The present study indicates that rare-earth ions of Eu~(3+) and Tb~(3+) are dispersed homogeneously in these oxyfluriode glasses and the degree of their its asymmetry (i.e., the electric field gradient) is also widely distributed due to the coordination of both F~- and O~(2-) ions. The new oxyfluoride glasses with high BaO and Al_2O_3 contents have a high potential as hosts for new phosphors with rare-earth ions.
机译：1Eu_2O_3-50BaF_2-xAl_2O_3-（50-x）B_2O_3（x-0-25），yEu_2O_3-50BaF_2-25Al_2O_3-25B_2O_3（y = 0-10）（mol）和zEu_2O_3-1Tb_4O_7_50BaF_2-25Al_2的新型氟氧化物玻璃使用常规的熔融淬火方法合成了氟含量高（F /（F + 0）= 0.4）的-25B_2O_3（z = 0，0.5）（mol），并且具有诸如量子产率（η）的光致发光性质，阐明了Eu〜（3+）离子的寿命（τ）和浓度猝灭效应。具有25Al_2O_3的玻璃在波长λ= 396 nm的激发下在可见光区域显示出极好的红色发光，量子产率（η）极高，为97％，发射的长寿命t-3.29 ms（λ-612 〜5D_0能级的Eu〜（3+）离子。在这些玻璃中，浓度淬火的效果也非常小，例如，即使对于具有10Eu_2O_3的玻璃，η= 72％。还获得了Tb〜（3+）离子绿色发射的η= 52％和Eu〜（3 +）-Tb〜（3+）共掺杂离子的黄色发射的η= 81％在眼镜上。本研究表明，Eu〜（3+）和Tb〜（3+）稀土离子均匀地分散在这些氟代玻璃中，并且它们的不对称程度（即电场梯度）也很广F〜-和O〜（2-）离子的配位具有高BaO和Al_2O_3含量的新型氟氧化玻璃具有很高的潜力，可作为新型稀土离子荧光粉的主体。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号