...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Materials Chemistry, C. materials for optical and electronic devices >Cation vacancy repair for the enhancement of orange-yellow luminescence in Sr9Mg1.5?xKx(PO4)7:Eu2+ phosphors
【24h】

Cation vacancy repair for the enhancement of orange-yellow luminescence in Sr9Mg1.5?xKx(PO4)7:Eu2+ phosphors

机译：阳离子空位修复在SR9MG1.5中提高橙黄色发光的修复XKX（PO4）7：EU2 +磷光体

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

Many approaches have contributed to improving the luminescence properties of phosphors, including surface coating, direct reduction and charge compensation, which are involved in reducing the inner or surface defects of luminescent particles. In this study, we propose a cation vacancy repair strategy to successfully improve the orange-yellow luminescence properties of the Sr _(9) Mg _(1.5) (PO _(4) ) _(7) :Eu ~(2+) phosphor. The main idea of the strategy is that introducing K ~(+) repairs the vacancy at the Mg(1) site according to the formula . The preferred substitution of the large Mg(1) site by K ~(+) is supported by theoretical calculations. As a result, the luminescence of the repaired phosphate phosphor was enhanced by 2.5 times, and the internal and external quantum efficiency significantly increased by 50.5% and 55.4%, respectively. Additionally, the thermal stability was also a little improved. The enhancement mechanisms for luminescence are discussed in detail based on investigations of the microstructure, luminescence spectra, decay curves and concentration using various analysis techniques. We find that low luminescence efficiency is due to the existence of vacancy defects in the phosphor. Through using the repaired Sr _(9) MgK(PO _(4) ) _(7) :Eu ~(2+) phosphor, a white LED package demonstrated a low correlated color temperature (～2900 K), high color rendering index (～90) and R9 > 91. We expect that the strategy proposed herein would improve luminescence for other phosphors with vacancy defects.
机译：许多方法有助于改善磷光体的发光性质，包括表面涂层，直接减少和电荷补偿，这参与减小发光颗粒的内部或表面缺陷。在这项研究中，我们提出了阳离子空位修复策略，以成功改善SR _（9）Mg _（1.5）（PO _（4））_（7）：欧盟〜（2+）的橙黄色发光性质磷。该策略的主要思想是介绍K〜（+）根据公式修理Mg（1）位点的空位。通过k〜（+）的大mg（1）位点的优选取代由理论计算支持。结果，修复的磷酸盐磷光体的发光增强了2.5倍，内部和外部量子效率显着增加了50.5％和55.4％。另外，热稳定性也有点改善。利用各种分析技术的研究，基于微观结构，发光光谱，衰减曲线和浓度的研究详细讨论了发光机制。我们发现低发光效率是由于磷光体中空位缺陷的存在。通过使用修复的SR _（9）MGK（PO _（4））_（7）：eu〜（2+）磷光体，白色LED封装显示出低相关色温（〜2900 k），高显色指数（〜90）和R9> 91.我们预计本文提出的策略将改善具有空位缺陷的其他荧光粉的发光。

著录项

  • 来源
  • 作者

    Liping Yu; Huifang Yan; Yanting Fan; Jinhui Zhang; Zhongyun Ma; Wenli Zhou; Yan Chen; Fengjuan Pan; Shixun Lian;

  • 作者单位

    Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research Ministry of Education College of Chemistry and Chemical Engineering Hunan Normal University;

    Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research Ministry of Education College of Chemistry and Chemical Engineering Hunan Normal University;

    Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research Ministry of Education College of Chemistry and Chemical Engineering Hunan Normal University;

    Foshan Nationstar Optoelectronic Company Ltd;

    Department of Chemistry Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education;

    Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research Ministry of Education College of Chemistry and Chemical Engineering Hunan Normal University;

    School of Applied Physics and Materials Wuyi University;

    College of Chemistry and Molecular Engineering Peking University;

    Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research Ministry of Education College of Chemistry and Chemical Engineering Hunan Normal University;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 物理化学（理论化学）、化学物理学;
  • 关键词

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