...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >A new yellowish-green-emitting phosphor: Eu~(2+)-doped K_4CaSi_3O_9
【24h】

A new yellowish-green-emitting phosphor: Eu~(2+)-doped K_4CaSi_3O_9

机译：一种新的黄绿色发光荧光粉：Eu〜（2+）掺杂的K_4CaSi_3O_9

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

Eu~(2+)-activated K_4CaSi_3O_9 phosphors were synthesized by conventional solid-state reaction. The phase formation was confirmed by X-ray powder diffraction measurements. The photoluminescence excitation and emission spectra were investigated. The phosphor presents bright yellowish-green-emitting luminescence under the excitation of UV and near UV light. The luminescence absolute quantum efficiencies of the phosphors with different Eu~(2+)-doping levels (1.0-5.0 mol%) were measured. The crystal structure and the site-occupancy of Eu~(2+) ions doped in K_4CaSi_3O_9 crystal lattice were discussed. Two different Eu~(2+) centers were assigned according to the crystal structure and the luminescence characteristics. The dependence of luminescence intensity on temperatures (25-150°C) was measured. The chromaticity coordinates and activation energy (ΔE) for thermal quenching were reported. The phosphor shows an excellent thermal stability on temperature quenching.
机译：通过常规固相反应合成了Eu〜（2+）活化的K_4CaSi_3O_9荧光粉。通过X射线粉末衍射测量证实了相形成。研究了光致发光的激发和发射光谱。磷光体在紫外光和近紫外光的激发下呈现出亮的黄绿色发光。测量了不同Eu〜（2+）掺杂水平（1.0〜5.0 mol％）的荧光粉的发光绝对量子效率。讨论了K_4CaSi_3O_9晶格中掺杂的Eu〜（2+）离子的晶体结构和位点占有率。根据晶体结构和发光特性分配了两个不同的Eu〜（2+）中心。测量了发光强度对温度（25-150℃）的依赖性。报道了用于热淬灭的色度坐标和活化能（ΔE）。磷光体在温度淬火时显示出极好的热稳定性。

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