激发波长依赖的持续发光来自单元非静电测量CaGaxO4:Bi用于动态防伪
Bo-Mei Liu1,2,3, Yue Lin4, Yingchun Liu4
1School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, China. liubomei@gdut.edu.cn.
Light, science & applications
|October 10, 2024
概括
研究人员开发了一种新材料,CaGaxO4:Bi,表现出超长的,可调色的持续发光 (PersL). 这一突破允许动态颜色调制用于显示器和安全方面的高级应用.
科学领域:
- 材料科学 材料科学 材料科学
- 固态化学 固态化学
- 光物理学的光学物理学
背景情况:
- 动态持久发光 (PersL) 对显示器,生物传感和信息安全至关重要.
- 实现可眼检测和激发波长依赖的PersL仍然是一个重大挑战.
研究的目的:
- 合成和描述一种具有动态,可调色持续发光的新材料.
- 阐明观察到的持续发光和颜色调性背后的机制.
主要方法:
- 合成非静电测量的CaGaxO4:Bi (x<2) 化合物.
- 持续发光性质的实验性表征.
- 理论计算 (例如,DFT) 来理解缺陷状态和充电过渡.
主要成果:
- 通过改变激发波长,证明了超长,可调色的PersL从绿色到色.
- 建立了Bi3+发射器,陷状态和多色PersL之间的相关性.
- 确认了缺陷状态的热力学电荷转换.
结论:
- 开发的CaGaxO4:Bi材料提供了动态的,可调色的PersL.
- 这种材料对视觉传感,多色显示器,信息加密和防伪等应用具有前景.
- 打开了智能光电材料的道路,并控制了PersL.
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