Near-infrared Phosphor BaY2Al2Ga2SiO12∶Cr3+ with Excellent Thermal Stability and Considerable Quantum Efficiency

被引：0
|
作者：
Yuan W. [1 ,2 ]
Pang R. [2 ]
Zhang S. [1 ,2 ]
Zhang H. [1 ,2 ]
机构：
[1] State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun
[2] School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei
来源：
Faguang Xuebao/Chinese Journal of Luminescence | 2024年 / 45卷 / 02期
基金：
中国国家自然科学基金;
关键词：
Cr[!sup]3+[!/sup; near-infrared emission; NIR pc-LED; quantum efficiency; thermal stability;
D O I：
10.37188/CJL.20230296
中图分类号：
学科分类号：
摘要：
In recent years,near-infrared phosphor-converted light-emitting diode (NIR pc-LED) has attracted widespread attention in the fields of night vision,bioimaging and non-destructive testing. However,obtaining NIR phosphors with both high quantum efficiency and excellent thermal stability remains a great challenge. In this work, we synthesized a novel NIR phosphor BYAGSO∶Cr3+. Under 440 nm excitation,BYAGSO∶Cr3+ shows a broad band emission peaked at 690 nm,which originates from the combination of the spin-forbidden 2E→4A2 transition and spin-allowed 4T2→4A2 transition of Cr3+ in a medium octahedral crystal field environment. Interestingly,this phosphor exhibits excellent thermal stability,and the optimal BYAGSO∶0. 06Cr3+ remains at 99% of its initial intensity at 200 °C . Meanwhile,this phosphor also has considerable quantum efficiency of 30. 3%. A NIR pc-LED device was fabricated by combining BYAGSO∶0. 06Cr3+ with a 450 nm blue LED chip,which exhibited the output power of 70. 83 mW at the driving current of 300 mA,and the photovoltaic conversion efficiency of 11. 20% at the driving current of 20 mA. The results indicates that BYAGSO∶0. 06Cr3+ is a promising phosphor for NIR pc-LED applications. © 2024 Editorial Office of Chinese Optics. All rights reserved.
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页码：290 / 298
页数：8
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