相关实验视频
Updated: Mar 12, 2026
07:03
Low-energy Cathodoluminescence for OxyNitride Phosphors
Published on: November 15, 2016
11.2K
Cr3+-激活的Mg4GaSbO8 Orthorhombic脊柱衍生与多站点占用可调节的宽带近红外辐射
Qinan Mao1, Xiaoqian Zhang1, Zaixi Yin1
1Center of Advanced Optoelectronic Materials, College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, People's Republic of China.
Inorganic chemistry
|March 11, 2026
概括
我们开发了一种新的添加材料,Mg4GaSbO8 (MGSO),用于近红外 (NIR) 发光二极管 (LED). 这种新具有可调节的超宽带NIR发射,对于先进的光学应用至关重要.
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:
- 高性能宽带近红外 (NIR) 光器对于先进的NIR光转换发光二极管 (pc-LED) 来说至关重要.
- 开发具有可调节的排放特性的材料对于扩展NIR应用至关重要.
研究的目的:
- 报告一种新的Cr3+合的Mg4GaSbO8 (MGSO) 发光材料.
- 通过Cr3+度调制来研究NIR发射的可调性.
- 探索MGSO:Cr3+在NIR pc-LED中的潜力.
主要方法:
- 合成 Cr3+ 合的 Mg4GaSbO8 (MGSO) 材料.
- 光谱分析 (光照发光,温度依赖的辐射) 用于描述发光特性.
- 使用MGSO:Cr3+的NIR pc-LED原型的制造和测试.
主要成果:
- 合成了一种由 spinel 衍生而来的新型正合体MGSO:Cr3+.
- 可调节的超宽带NIR发射 (100308 nm FWHM) 是通过变化的Cr3+度来实现的,该度归因于三个不同的Cr3+发射中心.
- 优化的MGSO:0.07Cr3+表现出高量子产量 (80.4%) 和良好的热稳定性 (85.6%强度在373K).
- 高剂量兴奋剂 (x=0.20) 导致异常的光谱扩展,尽管降低了热稳定性.
结论:
- MGSO:Cr3+是宽带NIR发射的一个有前途的材料.
- 该材料显示了在非破坏性检查和通过NIR pc-LEDs进行NIR光谱学方面的应用潜力.
- 对Cr3+兴奋剂的精确控制使得对特定应用的光谱特性进行调整.
相关概念视频
01:14Photoluminescence: Applications
1.2K
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...
1.2K
01:23Photoluminescence: Fluorescence and Phosphorescence
4.3K
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...
4.3K