Cr3+/Yb3+ 编Cs2 NaInCl6 双矿用于近红外发光二极管
Xinyu Fu1,2, Huwei Li1,3, Hongxia Yue1,2
1State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China.
Inorganic chemistry
|April 22, 2025
概括
研究人员开发了一种新的近红外 (NIR) 发光二极管 (LED),使用Cr3+合双矿Cs2NaInCl6材料. 这一进步显著提高了生物成像和安全监控应用的光效.
科学领域:
- 材料科学 材料科学 材料科学
- 固态物理 固态物理
- 光子学是指光子学的使用方法.
背景情况:
- 近红外 (NIR) 发光二极管 (LED) 对生物成像和安全至关重要,但它们的性能受到低效的发光材料的限制.
- 开发具有高光效率的新型材料对于克服NIR LED技术当前的限制至关重要.
研究的目的:
- 研究双矿Cs2NaInCl6作为 (Cr3+) 兴奋剂的宿主材料的潜力,以实现广泛的NIR发射.
- 通过联合兴奋剂策略,提高NIR发射器的光发光量子产量 (PLQY) 和整体性能.
主要方法:
- 合成了Cr3+合的Cs2NaInCl6双矿,并研究了其发光特性.
- 研究了从自我捕获激子 (STEs) 到Cr3+离子的能量转移 (ET) 机制.
- 与 (Yb3+) 配合Cs2NaInCl6:Cr3+以进一步优化发光,并制造了一种原型NIR LED设备.
主要成果:
- 在Cs2NaInCl6:Cr3+中实现了广泛的NIR发射 (800-1300nm),半最大时的全宽度 (FWHM) 为~150nm,高PLQY高达70%.
- 与Yb3+的联合兴奋剂在最佳兴奋剂度下进一步增加了PLQY,达到76%.
- 制造了一种小型的NIR LED设备,在夜视,无痕视角检测和生物成像方面表现出卓越的性能.
结论:
- Cs2NaInCl6被确定为Cr3+兴奋剂的合适宿主矩阵,可实现高效的NIR发射.
- 在实际的NIR LED应用中,Yb3+联合剂有效地提高了Cs2NaInCl6:Cr3+的发光性能.
- 开发的NIR LED对于需要在近红外频谱中有效发射光的先进应用具有显著的前景.
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