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一种高效的LiSrGaF6:Cr3+化,具有宽带NIR发射,朝着类似太阳光的全光谱照明方向发射
Di Wu1,2,3, Yan Li1,4, Yu Liao1,4
1Faculty of Materials Metallurgy and Chemistry, Collage of Rare earth, Jiangxi University of Science and Technology, Ganzhou 341000, P.R. China. songbliu@jxust.edu.cn.
Dalton transactions (Cambridge, England : 2003)
|August 23, 2023
概括
一种新型的化化,LiSrGaF6:Cr3+,为先进的照明提供高效和稳定的近红外 (NIR) 宽带发射. 这一发展增强了转换发光二极管 (pc-LED) 的功能,用于诸如红外夜视等应用.
科学领域:
- 材料科学 材料科学 材料科学
- 固态照明 固态照明
- 发光的阴影是什么意思
背景情况:
- 全频谱光转换发光二极管 (pc-LED) 需要近红外 (NIR) 辐射来弥合频谱差距,以实现增强的应用.
- 开发具有高量子效率 (QE),热稳定性和广泛排放的NIR光体仍然是Cr3+化材料面临的挑战.
研究的目的:
- 为了合成和表征一种新的LiSrGaF6:Cr3+化,用于高性能NIR发射.
- 评估在紧的不可见光源和类似太阳光的全光谱pc-LED中使用的潜力.
主要方法:
- 合成的LiSrGaF6:Cr3+化物.
- 在蓝光激发下NIR发光特性的表征,包括光谱范围,半最大时全宽度 (FWHM),QE和热稳定性.
- 制造和测试NIR pc-LED设备和一个采用新型的全频率对NIR pc-LED.
主要成果:
- 实现了超宽带NIR发射 (6501150nm,FWHM 149nm,峰值在~813nm) 具有高QE (76.88%) 和优异的热稳定性 (61.62%强度在423K).
- 经过证明的NIR pc-LED设备的输出功率为42.82mW,光电转换效率为14.27%.
- 构建了一个类似太阳光的Vis-NIR pc-LED (4001000nm),具有高颜色染指数 (CRI 95.1) 和光效率 (LE 50.22 lm W-1).
结论:
- LiSrGaF6:Cr3+对高效和稳定的宽带NIR发射具有有前途的特性.
- 是紧的不可见光源,红外夜视和高质量的全光谱照明中先进应用的可行候选者.
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