当前位置:
X-MOL 学术
›
Mater. Today Phys.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Dual center luminescence properties of LiGaAl4O8:Cr3+ near infrared phosphors for LED applications
Materials Today Physics ( IF 10.0 ) Pub Date : 2024-08-26 , DOI: 10.1016/j.mtphys.2024.101540
Luhui Zhou , Dashuai Sun , Guan Peng , Zeyu Lyu , Zheng Lu , Pengcheng Luo , Congcong Fan , Xiaowei Zhang , Hongpeng You
Materials Today Physics ( IF 10.0 ) Pub Date : 2024-08-26 , DOI: 10.1016/j.mtphys.2024.101540
Luhui Zhou , Dashuai Sun , Guan Peng , Zeyu Lyu , Zheng Lu , Pengcheng Luo , Congcong Fan , Xiaowei Zhang , Hongpeng You
Near-infrared (NIR) phosphor-converted light emitting diodes (NIR pc-LEDs) hold great promise for applications in night vision imaging, nondestructive analysis, and plant growth. Although some NIR phosphors have been developed in recent years, there are fewer studies on Cr3+ -doped multisite luminescent phosphors. Here, we report a novel LiGaAl4 O8 :x Cr3+ (LGAO:Cr3+ ) phosphors with double Cr3+ luminescence centers. At low doping concentration, LGAO:Cr3+ is dominated by the emission of Cr1. With the increase of doping concentration x , the Cr2 portion of emission intensity increases due to the increased probability of the energy transfer from Cr1 to Cr2. Finally, using the LGAO:0.02Cr3+ NIR phosphor and a commercial 410 nm chip, a NIR pc-LED prototype with a NIR output power of 43.7 mW at 100 mA drive current and a photovoltaic conversion efficiency of 19.2 % at 10 mA was fabricated and its application in visual inspection of precise devices and angiography was demonstrated. This work provides an in-depth and careful study of the luminescent mechanism of the dual-centerd NIR phosphor and serves as a good paradigm for the development of NIR pc-LEDs.
中文翻译:
用于 LED 应用的 LiGaAl4O8:Cr3+ 近红外荧光粉的双中心发光特性
近红外 (NIR) 荧光粉转换发光二极管 (NIR pc-LED) 在夜视成像、无损分析和植物生长方面的应用前景广阔。尽管近年来已经开发出一些近红外荧光粉,但对Cr3+掺杂多位点发光荧光粉的研究较少。在这里,我们报道了一种具有双 Cr3+ 发光中心的新型 LiGaAl4O8:xCr3+ (LGAO:Cr3+) 荧光粉。在低掺杂浓度下,LGAO:Cr3+的发射主要是Cr1。随着掺杂浓度x的增加,由于能量从Cr1到Cr2转移的概率增加,Cr2部分的发射强度增加。最后,使用 LGAO:0.02Cr3+ 近红外荧光粉和商用 410 nm 芯片,制作了近红外 pc-LED 原型,在 100 mA 驱动电流下近红外输出功率为 43.7 mW,在 10 mA 下光电转换效率为 19.2%。展示了其在精密设备视觉检查和血管造影中的应用。这项工作对双中心近红外荧光粉的发光机制进行了深入细致的研究,为近红外pc-LED的发展提供了良好的范例。
更新日期:2024-08-26
中文翻译:
用于 LED 应用的 LiGaAl4O8:Cr3+ 近红外荧光粉的双中心发光特性
近红外 (NIR) 荧光粉转换发光二极管 (NIR pc-LED) 在夜视成像、无损分析和植物生长方面的应用前景广阔。尽管近年来已经开发出一些近红外荧光粉,但对Cr3+掺杂多位点发光荧光粉的研究较少。在这里,我们报道了一种具有双 Cr3+ 发光中心的新型 LiGaAl4O8:xCr3+ (LGAO:Cr3+) 荧光粉。在低掺杂浓度下,LGAO:Cr3+的发射主要是Cr1。随着掺杂浓度x的增加,由于能量从Cr1到Cr2转移的概率增加,Cr2部分的发射强度增加。最后,使用 LGAO:0.02Cr3+ 近红外荧光粉和商用 410 nm 芯片,制作了近红外 pc-LED 原型,在 100 mA 驱动电流下近红外输出功率为 43.7 mW,在 10 mA 下光电转换效率为 19.2%。展示了其在精密设备视觉检查和血管造影中的应用。这项工作对双中心近红外荧光粉的发光机制进行了深入细致的研究,为近红外pc-LED的发展提供了良好的范例。