通过氧气空缺中心创建多模式发光,用于高水平的防伪
Fanchao Men1, Tao Hu1,2, Zelong Jiang1
1School of Applied Physics and Materials, Wuyi University, Jiangmen 529020, Guangdong Province , P. R. China.
Inorganic chemistry
|December 19, 2023
概括
研究人员开发了一种新型的Tb3+激活,具有多种光学特性,用于增强防伪. 这种材料表现出可调节的光发光,持续发射和可逆光色,提供先进的安全功能.
科学领域:
- 材料科学 材料科学 材料科学
- 发光的光度是非常的低.
- 固态化学 固态化学
背景情况:
- 将多个光学特性集成到单一材料中对于先进的防伪技术至关重要.
- 现有的设计缺乏明确的原则和机制来实现同时实现多模式光学功能.
研究的目的:
- 开发一种具有可调节光发光,持续发射,热刺激光发光和可逆光色的新型.
- 阐明F型颜色中心和氧空缺在实现这些多模光学特性中的作用.
- 为了证明这种在高安全防伪技术中的应用.
主要方法:
- 合成Tb3+激活的Mg4Ga8Ge2O20. 的合成
- 研究光学特性,包括光发光,持续发射,热刺激发光和光色.
- 使用实验技术,对氧气空位和F型色中心进行表征.
- 制造一个灵活的/聚合物复合材料.
主要成果:
- 在单一材料中实现了可调色的光发光,长寿命的持续发射,热刺激的光发光和可逆光色.
- 确定了氧气空缺,作为F型颜色中心的起源,作为能量储备.
- 证明深度为0.48-0.95 eV的色中心抑制了电子孔重组,使光色和持续发射成为可能.
- 由于快速的电子孔重组,在刺激时观察到明亮的热刺激发光和颜色漂白.
结论:
- 开发的Tb3+激活的Mg4Ga8Ge2O20,有效地集成多种光学特性,用于先进的应用.
- 类似F的颜色中心机制为设计多功能发光材料提供了指导原则.
- 这种灵活的复合材料对高安全性光防伪应用非常有前途.
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