绿色和近红外双频段光发光在 γ-AlON:Mn2+ 允许高水平的防伪和加密
Zhiwei Xia1,2, Shihai You1, Rujun Yang3
1Research Institute of Frontier Science, Southwest Jiaotong University, Chengdu 610031, China.
Inorganic chemistry
|February 5, 2025
概括
这项研究引入了双带发光材料,γ-AlON:Mn2+光体,可发出可见绿色和不可见近红外光. 这一突破使先进的光学防伪和加密技术成为可能.
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:
- 多色发光材料对于先进的光学防伪和加密至关重要.
- 从单个光剂与单个剂中实现可见和不可见的双重发光是一个重大挑战.
研究的目的:
- 开发单一合的γ-AlON:Mn2+光体,其具有跨越可见和不可见区域的双频段发射.
- 研究发光机制,并探索在防伪和加密方面的应用.
主要方法:
- γ-AlON:Mn2+的合成,含有不同 (Mn2+) 兴奋剂度.
- 在450nm激发下进行光发光谱学,以分析发射光谱.
- 发光特性与Mn2+度和离子配对的相关性.
主要成果:
- 低剂量的γ-AlON:Mn2+ (≤0.02) 在515nm显示绿色辐射.
- 高剂量的γ-AlON:Mn2+ (≥0.05) 在730nm处表现出额外的近红外辐射.
- 归因于孤立的Mn2+离子和Mn2+-Mn2+对的双带辐射.
结论:
- 成功实现了可见 (绿色) 和不可见 (近红外) 双频段发射在单一合的γ-AlON:Mn2+光体中.
- 展示了一种双层光学防伪和信息加密系统.
- 这项工作提供了关于无机光体的发光调节及其应用的见解.
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