在Yb3+-Tm3+的酸玻璃中,变量比蓝色/红色上升转换
相关实验视频
Updated: Aug 17, 2026
10:17
20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier
Published on: July 12, 2017
11.6K
Optics letters
|July 14, 2023
概括
控制Ytterbium-Thulium (Yb3+-Tm3+) 合玻璃同时发出蓝光和红光是一项挑战. 这项研究表明,调整酸玻璃中的二氧化含量调整了蓝色到红色上升转换 (UC) 排放率.
科学领域:
- 材料科学 材料科学 材料科学
- 光子学 是一个光子学.
- 发光的光度是非常的低.
背景情况:
- 由于光子能量差异很大,从单个激发波长通过向上转换 (UC) 同时发射蓝光和红光是困难的.
- 在可调节发光应用中,控制- (Yb3+-Tm3+) 编材料中蓝色和红色排放的比率至关重要.
研究的目的:
- 为了研究主体玻璃二氧化含量对Yb3+-Tm3+编的酸玻璃 (FSG) 中蓝色到红色UC排放率的影响.
- 阐明控制蓝色和红色排放主导的基本UC机制.
主要方法:
- 制造 Yb3+-Tm3+ 密封型酸玻璃,含有不同含量的二氧化.
- 使用980nm激光激发,光发光谱和扫描电子显微镜与能量分散式X射线光谱 (SEM-EDS) 进行了表征.
主要成果:
- 蓝色到红色的UC排放比率显然取决于FSG宿主中的二氧化含量.
- 分析表明,交叉放松 (CR) 过程 (1G4 + 3F2 → 3H6 + 3F4) 在确定蓝色或红色排放是否占主导地位方面发挥着关键作用.
- SEM-EDS证实了制造玻璃样品的组成和同质性.
结论:
- 在FSG中的二氧化含量是调整Yb3+-Tm3+系统中蓝色到红色向上转换排放比率的关键因素.
- 了解和控制CR过程概率为实现可变上转换发光提供了一条途径.
- 这项研究为开发可调节的UC发光应用的新材料提供了基础.
更多相关视频
相关概念视频
02:58Properties of Transition Metals
Transition metals are defined as those elements that have partially filled d orbitals. As shown in Figure 1, the d-block elements in groups 3–12 are transition elements. The f-block elements, also called inner transition metals (the lanthanides and actinides), also meet this criterion because the d orbital is partially occupied before the f orbitals.
02:42Valence Bond Theory
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...
02:58Crystal Field Theory - Octahedral Complexes
Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
03:02Colors and Magnetism
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 eye.
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 eye.
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...
01:25Deactivation Processes: Jablonski Diagram
Luminescence, the emission of light by a substance that has absorbed energy, is a process that involves the interaction of molecules with light. The energy-level diagram, or Jablonski diagram, is a graphical representation of these interactions, illustrating the various states and transitions a molecule can undergo. In a typical Jablonski diagram, the lowest horizontal line represents the ground-state energy of the molecule, which is usually a singlet state. This state represents the energies...