...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Optical Materials >Color temperature tunable of Dy~(3+)-doped LaPO_4 nanorods prepared via hydrothermal method for white LEDs applications
【24h】

Color temperature tunable of Dy~(3+)-doped LaPO_4 nanorods prepared via hydrothermal method for white LEDs applications

机译：水热法制备的Dy〜（3+）掺杂LaPO_4纳米棒的色温可调用于白光LED

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

Nano-powders of La(1-x)DyxPO4 with rod-like morphology have been synthesized via hydrothermal method and characterized by X-ray diffraction, TEM, FTIR and Raman spectroscopy. The X-ray diffraction patterns collected for the prepared materials indicated the high purity of crystalline phase with a monoclinic structure. Photoluminescence properties have been investigated based on excitation and emission spectra, decay curves and chromatic coordinates. The emission spectra show a broad blue band ascribed to the transitions from the excited levels I-4(11/2), I-4(13/2), I-4(15/2) and F-4(9/2) to the fundamental levels H-6(15/2). A yellow band related to the F-4(9/2)-> H-6(13/2) transition has been observed at 573 nm. The luminescence intensities ratio and lifetimes have been found to be dependent on the concentration of Dy3+ ion and the excitation wavelength. The decay curves present double exponential shape for all concentration of Dy3+. The yellow-to-blue emission intensity ratios and CIE chromaticity coordinates have been used to estimate the color of the emitted light. A high-quality of white light with three-color temperature (Warm, Natural or Daylight, Cool) has been obtained from a single emitting phosphor, LaPO4:Dy3+. The improved emission lifetimes and color temperature are suitable for application in the white light LED devices.
机译：通过水热法合成了具有棒状形态的La（1-x）DyxPO4纳米粉体，并通过X射线衍射，TEM，FTIR和拉曼光谱进行了表征。为制备的材料收集的X射线衍射图表明具有单斜晶结构的结晶相的高纯度。已经基于激发和发射光谱，衰减曲线和色坐标研究了光致发光性质。发射光谱显示宽蓝带，归因于从激发能级I-4（11/2），I-4（13/2），I-4（15/2）和F-4（9/2）的跃迁）至基本水平H-6（15/2）。在573 nm处观察到与F-4（9/2）-> H-6（13/2）跃迁相关的黄带。已经发现发光强度比和寿命取决于Dy3 +离子的浓度和激发波长。对于所有浓度的Dy3 +，衰减曲线呈现双指数形状。黄色至蓝色发射强度比和CIE色度坐标已用于估计发射光的颜色。从单一发光磷光体LaPO4：Dy3 +获得了具有三色温（温暖，自然或日光，凉爽）的高质量白光。改善的发射寿命和色温适用于白光LED器件。

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