在Eu-和Ti-Doped Lu2O2S材料中的XEOL和持久发光
Karina T Fonseca1, Nataly S Santos1, Marcelo C Portes1
1Department of Fundamental Chemistry, Institute of Chemistry, University of São Paulo, São Paulo-SP 05508-000, Brazil.
ACS omega
|August 11, 2025
概括
稀土氧硫化物 (RE2O2S) 显示出作为发光材料的希望. 这项研究通过微波辅助方法合成了杂的Lu2O2S,揭示了光电子应用的潜力.
科学领域:
- 材料科学 材料科学 材料科学
- 固态化学 固态化学
- 发光的光度是非常的低.
背景情况:
- 稀土氧硫化物 (RE2O2S) 是用于发光材料的稳定,具有成本效益的矩阵.
- 氧硫化 (Lu2O2S) 是显示技术和发光二极管的关键宿主.
- 用Eu3+,Ti,或Mg2+进行兴奋剂会改变发光和后光特性.
研究的目的:
- 为了研究结构,光学吸收和持续的光 Lu2O2S 与 Eu3+, Ti 和 Mg2+.
- 探索对Lu2O2S.的发光性质的影响.
- 通过一种新的,节能的微波辅助方法来合成这些材料.
主要方法:
- 微波辅助固态合成. 微波辅助固态合成.
- 用瑞特维尔德精细化进行结构分析的X射线衍射 (XRD).
- 扩散反射光谱 (DRS) 和X射线吸收近边缘结构 (XANES) 用于光学特性.
- 对于发光机制的X射线激发光学发光 (XEOL) 和电子磁共振 (EPR).
主要成果:
- 通过微波辅助方法成功合成相纯Lu2O2S及其杂变体.
- 确认在Lu L3边缘的矩阵吸收增强了发光.
- EPR研究表明,Ti仍然处于Ti4+状态,排除了发光中的光氧化过程.
- 在紫外线和X射线激发下观察到可见光的发射,具有显著的能量储存能力.
结论:
- O2S与Eu3+,Ti和Mg2+合,具有有前途的发光和储能能力.
- 微波辅助合成是快速和节能的.
- 这些材料有可能用于剂量测量,生物成像和光电子设备.
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