揭示压制的度灭增强的宽带近红外发射器
Endale T Basore1,2, Misgana U Dumesso1, Xiaofeng Liu3
1State Key Lab of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou 310027, China.
ACS applied materials & interfaces
|November 18, 2024
概括
研究人员使用 (Cr3+) 和 (Ni2+) 离子开发出更明亮的近红外光源. 这种新材料克服了以前的局限性,在转换发光二极管 (LED) 中实现了创纪录的输出功率和效率.
科学领域:
- 材料科学 材料科学 材料科学
- 光子学 是一个光子学.
- 固态化学 固态化学
背景情况:
- 过渡金属离子是光子学和光学中近红外 (近红外) 发光的关键.
- 过渡金属离子中的弱吸收和激发带限制了它们的转换性能.
- (Cr3+) 可以使 (Ni2+) 敏感,以引起激发,但度火会降低固体中的亮度.
研究的目的:
- 使用Cr3+-Ni2+系统在宽带近红外光发光 (PL) 中实现前所未有的亮度.
- 为了克服度火和竞争的能量沉没在合发光材料中.
- 开发高效的转换发光二极管 (LED).
主要方法:
- 研究了Cr3+-Ni2+系统,重点研究了发射器和灭器度之间的相互作用.
- 开发了一种超宽带近IR光发光.
- 将开发的与化 (InGaN) 发光二极管 (LED) 相结合.
主要成果:
- 通过调整Ni2+度以抵消火,显著提高了近红外光发光的亮度.
- 在转换LED中,在100mA时达到41.5mW的记录输出功率,在20mA时达到19.53%的光电效率.
- 展示了度火的内在抑制和消除竞争的能量沉降器.
结论:
- 优化时的Cr3+-Ni2+系统有效地抑制了近红外发射的度火.
- 强调发射器在降低激发能量的作用对于高效的发光至关重要.
- 这项工作为设计高效,敏感的发光材料为先进的光子应用铺平了道路.
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