相关实验视频
Updated: Sep 10, 2025

07:03
Low-energy Cathodoluminescence for OxyNitride Phosphors
Published on: November 15, 2016
10.8K
结构,光学和发光性质的研究 BaBPO (BaBP):Dy3+ 光用于固态照明应用
T Chandra Mohan1, P Sai Dinesh1, B Surya Narayana Devara2
1Department of Physics, Sri Venkateswara University, Tirupati, Andhra Pradesh, India.
概括
用 (Dy3+) 离子添加的新型酸被合成为白色发光二极管 (WLED). 这些Dy3+合的BaBP光器具有有前途的光发光特性,可用于高效的固态照明应用.
科学领域:
- 材料科学
- 固态化学
- 发光效应
背景情况:
- 开发高效的光灯对于先进的照明技术至关重要.
- (Dy3+) 离子以其在可见光谱中的特征发射而闻名.
- 酸 (BaBP) 主体为发光材料的应用提供了潜力.
研究的目的:
- 合成和描述新的白色发光BaBP:Dy3+.
- 对基于NUV的WLED进行研究这些光体的光发光特性.
- 评估它们对固态照明应用的潜力.
主要方法:
- 高温固态反应技术用于合成.
- 粉末X射线衍射 (PXRD) 用于相纯度和结构分析.
- 光谱技术 (FTIR,拉曼,UV-Vis DRS,光发光) 用于光学和发光特性.
主要成果:
- 合成的BaBP:Dy3+具有相纯度和特有的结构特征.
- 激发光谱在348nm处表现出强烈的峰值,适合近紫外线 (NUV) 激发.
- 发射光谱显示出 Dy3+ 转换的突出峰值,产生可调 CCT 值的白光发射.
结论:
- 合成的BaBP:Dy3+在NUV激发下显示出高效的白光发射.
- 分析发光特性,包括Y/B比率和度灭,证实了WLED的适用性.
- 这些是基于NUV制造白色发光二极管 (WLED) 和固态照明的有希望的候选者.
相关概念视频
Photoluminescence: Applications
485
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...
485
Variables Affecting Phosphorescence and Fluorescence
591
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...
591
Photoluminescence: Fluorescence and Phosphorescence
2.3K
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...
2.3K

