相关实验视频
Updated: Jun 11, 2025
07:03
Low-energy Cathodoluminescence for OxyNitride Phosphors
Published on: November 15, 2016
10.6K
主体敏感的酸 ZnGdB5O10:Mn2+/Dy3+/Sm3+:Mn2+:Mn2+:Mn3+:Mn2+:Mn3+:Mn2+:Mn2+:Mn3+:Mn3+:Mn3+:Mn3+:Mn3+:Mn3+:Mn3+:Mn3+
Yu Chen1, Yan Gao1, Rihong Cong1
1College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, People's Republic of China. congrihong@cqu.edu.cn.
Dalton transactions (Cambridge, England : 2003)
|October 9, 2024
概括
加多 (Gd3+) 在ZnB5O10中进行注,可以增强能量转移,从而有效发光. 这种宿主敏感化效应改善了红色,白色和色光输出,具有良好的热稳定性.
科学领域:
- 材料科学 材料科学 材料科学
- 固态化学 固态化学
- 发光的光度是非常的低.
背景情况:
- 光发光能转移对于调整发射颜色和提高效率至关重要.
- 宿主中的加多 (Gd3+) 离子可以促进宿主敏感化,将被吸收的能量转移到激活器.
研究的目的:
- 为了合成和描述基于Zn1-xMnxGdB5O10,ZnGd1-yDyyB5O10,以及ZnGd1-zSmzB5O10的新型.
- 研究这些材料中Gd3+介导的宿主敏感化效应.
- 评估潜在的照明应用的发光特性,包括发射颜色,量子效率和热稳定性.
主要方法:
- 使用高温固态反应方法合成.
- 通过粉末X射线衍射 (XRD) 确认相位纯度和兴奋剂.
- 光发光谱学用于分析激发和发射光谱.
- 光寿命测量以确认能量传输.
- 在现场进行高温实验以评估热稳定性.
主要成果:
- 成功合成并确认Mn2+,Dy3+和Sm3+化ZnGdB5O10的相位.
- 证明Gd3+宿主敏感化效应,通过Gd3+在激发光谱中的吸收和缩短Gd3+光寿命来表明.
- 2+的注会产生红光,Dy3+会产生近乎白色的光,Sm3+会产生色的光.
- 实现了25.5% (Mn2+),17.0% (Dy3+) 和17.4% (Sm3+) 的内部量子效率.
- 证明光发光的高热稳定性,表明在高温下能量的转移得到了增强.
结论:
- Gd3+敏感的ZnB5O10系统有效地产生可调节发射颜色 (红色,白色,色) 的.
- 主体敏感化机制对发光性质有着显著的贡献.
- 这些体由于其高效的能量传输和热稳定性,对照明应用具有有前途的潜力.
相关概念视频
03:02Colors and Magnetism
11.6K
Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
11.6K
02:42Valence Bond Theory
8.5K
Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
8.5K