通过CodopingCr3+ (d→d) 和Bi3+ (s→p) 在Cs2Ag0.6Na0.4InCl6双矿中进行广泛的双排放
Sajid Saikia1, Animesh Ghosh1, Angshuman Nag1
1Department of Chemistry, Indian Institute of Science Education and Research (IISER), Pune, 411008, India.
Angewandte Chemie (International ed. in English)
|June 28, 2023
概括
科学家们开发了一种新,可发射白光和近红外 (NIR) 辐射,用于食品质量评估. 这种双重功能材料通过非侵入性水分子分析,可以同时进行视觉检查和早期检测食物腐烂.
科学领域:
- 材料科学 材料科学 材料科学
- 固态化学 固态化学
- 光子材料的光子材料
背景情况:
- 开发先进的光剂对于创新的传感应用至关重要.
- 非侵入式检测食物腐烂需要具有特定光学特性的材料.
- 水分子吸收近红外 (NIR) 辐射为新鲜度评估提供了一个有前途的途径.
研究的目的:
- 设计和合成一种能够发射可见白光和广泛近红外 (NIR) 辐射的新型.
- 允许同时进行视觉检查和对食品新鲜性的非侵入性评估.
- 为了研究设计的的光发光特性和潜在机制.
主要方法:
- 与Cr3+和Bi3+离子一起对Cs2Ag0.6Na0.4InCl6化矿矿宿主进行辅助.
- 使用370nm紫外线发光二极管 (UV-LED) 进行激发.
- 进行温度依赖的光发光谱学 (6.4300 K) 并使用塔纳贝-苏加诺图进行分析.
主要成果:
- 一种Cr3+-Bi3+编码的Cs2Ag0.6Na0.4InCl6被成功合成.
- 体同时表现出温暖的白光和广泛的NIR (1000nm) 辐射,其量子输出率为27%.
- 从Bi3+到Cr3+离子的能量转移被证实是双重排放的机制.
- 发现Cr3+离子会经历一个弱晶场 (Dq/B=2.2),导致NIR发射.
- 一个由122个转换LED组成的概念验证面板展示了食品检查能力.
结论:
- 开发的双排为食品质量综合检查提供了一个有前途的解决方案.
- 该材料能够提供视觉和NIR光谱信息,提高了食品腐烂的检测.
- 这项工作为食品安全和质量控制中先进的光子材料开辟了道路.
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