• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Nanotechnology >Nanocrystalline lanthanide-doped Lu3Ga5O12 garnets: interesting materials for light-emitting devices
【24h】

Nanocrystalline lanthanide-doped Lu3Ga5O12 garnets: interesting materials for light-emitting devices

机译：掺杂镧的纳米晶Lu3Ga5O12石榴石：发光器件的有趣材料

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

Nanocrystalline Lu3Ga5O12, with average particle sizes of 40 nm, doped with a wide variety of luminescent trivalent lanthanide ions have been prepared using a sol-gel technique. The structural and morphological properties of the powders have been investigated by x-ray powder diffraction, high resolution transmission electron microscopy and Raman spectroscopy. Structural data have been refined and are presented for Pr3+, Eu3+, Gd3+, Ho3+, Er3+ and Tm3+ dopants, while room temperature excited luminescence spectra and emission decay curves of Eu3+-, Tm3+- and Ho3+-doped Lu3Ga5O12 nanocrystals have been measured and are discussed. The Eu3+ emission spectrum shows typical bands due to D-5(0) -> F-7(J) (J = 0, 1, 2, 3, 4) transitions and the broadening of these emission bands with the non-exponential behaviour of the decay curves indicates the presence of structural disorder around the lanthanide ions. Lanthanide-doped nanocrystalline Lu3Ga5O12 materials show better luminescence intensities compared to Y2O3, Gd3Ga5O12 and Y3Al5O12 nanocrystalline hosts. Moreover, the upconversion emission intensity in the blue-green region for the Tm3+- and Ho3+-doped samples shows a significant increase upon 647.5 nm excitation with respect to other common oxide hosts doped with the same lanthanide ions.
机译：使用溶胶-凝胶技术已经制备了纳米晶体Lu3Ga5O12，平均粒径为40 nm，掺杂了多种发光的三价镧系元素离子。通过X射线粉末衍射，高分辨率透射电子显微镜和拉曼光谱研究了粉末的结构和形态特性。完善了结构数据并给出了Pr3 +，Eu3 +，Gd3 +，Ho3 +，Er3 +和Tm3 +掺杂剂的结构数据，同时测量并讨论了Eu3 +-，Tm3 +-和Ho3 +掺杂的Lu3Ga5O12纳米晶的室温激发发光光谱和发射衰减曲线。 。 Eu3 +发射光谱显示出由于D-5（0）-> F-7（J）（J = 0、1、2、3、4）跃迁而引起的典型谱带，并且这些谱带的展宽具有非指数行为衰变曲线的“α”表明镧系元素离子周围存在结构紊乱。与Y2O3，Gd3Ga5O12和Y3Al5O12纳米晶基质相比，掺杂镧系元素的纳米晶Lu3Ga5O12材料显示出更好的发光强度。此外，对于Tm3 +和Ho3 +掺杂的样品，蓝绿色区域中的上转换发射强度相对于其他掺杂相同镧系元素离子的普通氧化物主体，在647.5 nm激发下显示出显着增加。

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