...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The journal of physical chemistry, C. Nanomaterials and interfaces >Luminescence and Energy Transfer Properties of Gd~(3+) and Tb~(3+) in LaAlGe_2O_7
【24h】

Luminescence and Energy Transfer Properties of Gd~(3+) and Tb~(3+) in LaAlGe_2O_7

机译：LaAlGe_2O_7中Gd〜（3+）和Tb〜（3+）的发光和能量转移性质

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

The novel phosphors of LaAlGe_2O_7 doped with Gd~(3+) and Tb~(3+) were synthesized, and their luminescence properties were investigated. In Tb~(3+)-activated LaAlGe_2O_7, the unusual excitation spectra showed only intense f-f transition of Tb~(3+) ions around the near-UV region, whereas the 4f-5d transition could be neglected. In the Gd~(3+)-Tb~(3+)-activated system, the decay time of Tb~(3+) emission under Gd~(3+) excitation at the ~6I_J energy level was longer than that measured under direct Tb~(3+) excitation at the ~5L_(10) energy level, which reinforces the existence of effective Gd~(3+)-to-Tb~(3+) energy transfer. In the ~5D_4 decay measurements, time-resolved spectra exhibited a "grow-in" behavior as the Tb~(3+) concentration was diluted (<0.03 mol), whereas only a simple exponential decay could be observed at higher (>0.05 mol) Tb~(3+) concentrations. Two linear relationships were found between the energy transfer probability (P_(Gd->Tb)) and the Tb~(3+) concentration, which is clear evidence that there were two kinds of efficient Gd~(3+)-to-Tb~(3+) energy transfer processes in terms of Tb~(3+) concentration.
机译：合成了掺有Gd〜（3+）和Tb〜（3+）的新型LaAlGe_2O_7荧光粉，并对其发光性能进行了研究。在Tb〜（3+）激活的LaAlGe_2O_7中，异常激发光谱仅显示了Tb〜（3+）离子在近紫外区域附近的强烈的f-f跃迁，而4f-5d跃迁可忽略不计。在Gd〜（3 +）-Tb〜（3+）激活的系统中，在〜6I_J能级下，Gd〜（3+）激发下Tb〜（3+）发射的衰减时间长于在在〜5L_（10）能级上直接进行Tb〜（3+）激发，从而加强了有效Gd〜（3+）到Tb〜（3+）能量转移的存在。在〜5D_4衰减测量中，随着Tb〜（3+）浓度被稀释（<0.03 mol），时间分辨光谱表现出“增长”行为，而在更高的浓度下（> 0.05则只能观察到简单的指数衰减）。摩尔）Tb〜（3+）浓度。在能量转移概率（P_（Gd-> Tb））与Tb〜（3+）浓度之间发现两个线性关系，这清楚地表明存在两种有效的Gd〜（3 +）-Tb以Tb〜（3+）浓度表示〜（3+）能量转移过程。

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