首页> 外文期刊>Advanced Functional Materials >Bright Blue Photo- and Electroluminescence from Eu~(2+)-Doped GaN/SiO_2 Nanocomposites
【24h】

Bright Blue Photo- and Electroluminescence from Eu~(2+)-Doped GaN/SiO_2 Nanocomposites

机译:Eu〜(2+)掺杂的GaN / SiO_2纳米复合材料的亮蓝色光致发光

获取原文
获取原文并翻译 | 示例
           

摘要

In this article we demonstrate the synthesis of Eu~(2+)-doped GaN/SiO_2 nanocomposites using a simple solid state reaction and their use in light-emitting devices. The nanocomposite exhibits a bright blue luminescence when excited in the UV region (quantum yield = 23 %). The origin of the blue emission is attributed to the presence of europium ions in the +2 oxidation state in the GaN/SiO_2 nanocomposites. Analysis of the EPR spectrum of europium-doped GaN/SiO_2 nanocomposites confirms the existence of Eu~(2+) in the nanocomposites. Various control experiments show that the blue emission arises from these europium ions and that the interface of GaN and silica plays a crucial role. The Eu~(2+)-doped GaN/SiO_2 nanocomposite also exhibits a bright blue electroluminescence. Furthermore, the nanocomposites can be coated with a polymer to tune their dispersibility in organic medium.
机译:在本文中,我们演示了使用简单的固态反应合成Eu〜(2+)掺杂的GaN / SiO_2纳米复合材料及其在发光器件中的应用。纳米复合材料在紫外线区激发时表现出亮蓝色发光(量子产率= 23%)。蓝色发射的起源归因于GaN / SiO_2纳米复合材料中+2氧化态的of离子的存在。 euro掺杂的GaN / SiO_2纳米复合材料的EPR光谱分析证实了纳米复合材料中Eu〜(2+)的存在。各种控制实验表明,蓝光发射是由这些euro离子引起的,而GaN和二氧化硅的界面起着至关重要的作用。 Eu〜(2+)掺杂的GaN / SiO_2纳米复合材料还具有亮蓝色的电致发光特性。此外,可以用聚合物涂覆纳米复合材料以调节其在有机介质中的分散性。

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