紫外B和近红外双频段发光在Bi3+/Bi2+的Codoped持久用于光学存储应用
Shihai Miao1, Xulong Lv1, Xihui Shan1
1Key Laboratory for Liquid-Solid Structure Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan 250061, P. R. China.
ACS applied materials & interfaces
|April 25, 2024
概括
研究人员开发了一种新型的甲合,同时表现出紫外B和近红外持续发光. 这种多功能材料还表现出可逆光色,使其适用于先进的光学应用.
科学领域:
- 材料科学 材料科学 材料科学
- 固态化学 固态化学
- 发光和光谱学 发光和光谱学
背景情况:
- 开发单元多功能发光材料对于现代光谱学至关重要.
- 通过单金属离子兴奋剂实现多种发光特性仍然是一个重大挑战.
- 持久光剂在激发后提供持久的发光.
研究的目的:
- 设计一个具有多种发光特性的单一材料系统.
- 为了研究Ca3Ga2Ge3O12中石离子 (Bi3+/Bi2+) 的配合,以增强发光.
- 探索这种材料在光学存储和防伪方面的潜力.
主要方法:
- 合成固有的Bi3+/Bi2+配角的Ca3Ga2Ge3O12持久.
- 谱学研究,包括X射线吸收近边缘结构 (XANES) 和X射线光电谱 (XPS),以表征氧化状态.
- 在紫外线 (UV) 光照射后评估持久发光 (紫外B和近红外波段) 和光色特性.
主要成果:
- 该材料在254nm紫外线激发后同时呈现长时间的紫外B (UVB) 和近红外 (NIR) 持续发光 (>12小时).
- 紫外线 (UVB) 和红外线 (NIR) 后光分别归因于不同的Bi3+和Bi2+发射器.
- 体表现出快速可逆的光色,在紫外线下从白色变为棕色,在热或蓝色/白色光刺激时恢复.
结论:
- 双3+/双2+共Ca3Ga2Ge3O12是一种高效的多式发光材料.
- 双带持久发光和可逆光色的组合提供了独特的功能.
- 这种材料显示出在光学数据存储和防伪技术中的应用潜力很大.
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