相关实验视频
Updated: Jul 8, 2025

07:03
Low-energy Cathodoluminescence for OxyNitride Phosphors
Published on: November 15, 2016
10.7K
开发热稳定的红色发射无双矿,其内部PLQY接近100
Hong Li1, Li Li1, Lingsong Mei1
1School of Science, Chongqing University of Posts and Telecommunications, Chongqing, 400065, P. R. China. lilic@cqupt.edu.cn.
Dalton transactions (Cambridge, England : 2003)
|December 11, 2023
概括
通过使用欧添加剂的,和氧化 (Ca2ScTaO6:Eu3+) 合成了高效的发出红色的. 这些材料在先进的白色发光二极管 (WLED) 应用中表现有前途,因为它们具有出色的发光和热稳定性.
科学领域:
- 材料科学 材料科学 材料科学
- 固态照明 固态照明
- 发光材料 发光材料
背景情况:
- 白色发光二极管 (WLED) 对于节能固态照明至关重要.
- 高性能发出红色的光是提高WLED质量的必要条件.
研究的目的:
- 为WLED应用合成和表征新的Eu3+合的Ca2ScTaO6光体.
- 研究这些光体的发光性质,热稳定性和潜在应用.
主要方法:
- 高温固态合成方法. 高温固态合成方法.
- 用于晶体结构分析的X射线衍射.
- 光发光谱学用于光学属性评估.
主要成果:
- 成功合成了单质无双矿Ca2ScTaO6:Eu3+材料 (空间组P21/n).
- 在614nm (5D0 → 7F2过渡) 观察到最强的辐射,在40mol%的最佳兴奋剂下.
- 实现了超高的内部量子产量 (~100%) 和良好的热稳定性 (81.5%在423K).
- 制造了一个WLED,其相关色温为4201K,颜色染指数为87.62.
- 已证明适用于使用基薄膜的柔性显示器.
结论:
- 合Eu3+的Ca2ScTaO6光体表现出极好的发光和热稳定性.
- 这些光体是近紫外激发的WLED和柔性显示应用的有希望的候选者.
相关概念视频
Photoluminescence: Applications
405
Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...
405
Photoluminescence: Fluorescence and Phosphorescence
2.1K
Photoluminescence is a process where a molecule absorbs light energy and re-emits it in the form of light. This phenomenon occurs when a substance absorbs photons, promoting its electrons to higher energy level excited states, followed by a relaxation process in which the electrons return to their original ground state energy levels and emit light. Photoluminescence is widely observed in various materials, including semiconductors, and organic and inorganic compounds.
A pair of electrons in a...
A pair of electrons in a...
2.1K
Variables Affecting Phosphorescence and Fluorescence
506
Fluorescence and phosphorescence are essential phenomena in fields like analytical chemistry, biological imaging, and materials science, where they detect molecular properties and visualize cellular structures. Understanding the variables that influence these luminescent behaviors is crucial for maximizing accuracy and efficiency in their applications. These variables can broadly be grouped into chemical structure, solvent properties, and external conditions, each playing a distinct role in...
506

