相关实验视频
Updated: Jun 6, 2026
07:03
Low-energy Cathodoluminescence for OxyNitride Phosphors
Published on: November 15, 2016
10.6K
稳定的CaYGaO的光发光调4:Bi/Eu通过组合调制和晶体现场工程为nUV wLEDs
Chang Wang1, Zhicai Yao1, Yifeng Lei2
1Hubei Key Laboratory of Plasma Chemistry and Advanced Materials & Key Laboratory of Green Chemical Engineering Process of Ministry of Education, Wuhan Institute of Technology, 430205 Wuhan, China.
Inorganic chemistry
|August 12, 2024
概括
这项研究介绍了一种新的CaYGaO4,添加了比斯木和欧洲,用于高质量的白色照明. 开发的体表现出增强的光发光和稳定性,证明了先进的LED应用的潜力.
科学领域:
- 材料科学 材料科学 材料科学
- 固态化学 固态化学
- 发光的阴影是什么意思
背景情况:
- 基于橄酸的酸盐CaYGaO4 (CYG) 由于其独特的结构和自光发光 (PL) 而显示出作为主体的希望.
- 开发高质量,全谱白色照明光器仍然是一个持续的挑战.
- 目前对CYG用于照明应用的研究是有限的.
研究的目的:
- 设计和合成新型CYG:Bi3+/Eu3+体,具有可控制的光发光特性,用于白色照明.
- 为了研究用Li+,Zn2+,Sr2+和La3+对光发特性进行合的效果.
- 为了证明这些的潜力在转换白色发光二极管 (pc-WLED) 装置中.
主要方法:
- 合成CaYGaO4 (CYG) 主体物质及其合变体 (CYG:Bi3+/Eu3+).
- 加入各种剂 (Li+, Zn2+, Sr2+, La3+) 来调整光发光 (PL) 特性.
- 结晶结构的表征,发光机制 (能量转移,辐射叠加) 和光学特性.
- 一个原型白色发光二极管 (WLED) 装置的制造和测试.
主要成果:
- 一个新的CYG:Bi3+/Eu3+被成功合成了可调节的PL特性.
- 与Li+/Zn2+配合提高了PL强度和量子效率.
- 通过修改nephelauxetic效应和晶体场分裂,与Sr2+调节的Bi3+PL进行合.
- 配合La3+使得结晶学站点工程能够获得温暖的白光.
- 一个概念验证的nUV-pumped WLED设备展示了出色的色彩染,光效和稳定性.
结论:
- 开发的CYG:Bi3+/Eu3+,通过多种剂进行优化,为高性能白色照明提供了一个有前途的途径.
- 战略代码合方法允许精确控制发光色彩和效率.
- 合成的具有出色的化学和热稳定性,适用于实际的LED应用.
相关概念视频
01:23Photoluminescence: Fluorescence and Phosphorescence
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...
01:26Variables Affecting Phosphorescence and Fluorescence
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...
01:14Photoluminescence: Applications
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...