Tunable luminescence via Cr3+–Yb3+/Nd3+ energy transfer in Cr3+ and Yb3+/Nd3+ coactivated NIR phosphors for non-destructive analysis

IF 6.1 1区 化学 Q1 CHEMISTRY, INORGANIC & NUCLEAR Inorganic Chemistry Frontiers Pub Date : 2024-11-08 DOI:10.1039/d4qi02260b
Xiaowei Zhang, Dashuai Sun, Pengcheng Luo, Luhui Zhou, Zheng Lu, Jia Liu, Congcong Fan, Xinyu Ye, Hongpeng You
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Abstract

For efficient near-infrared (NIR) emitters, tuning their luminescence properties is important for their extended optical applications. A fundamental study of garnet-type inorganics has led to the development of a new NIR phosphor Y3ScAl4O12:Cr3+ (YSAO:Cr3+), exhibiting emission in the range of 600 to 950 nm, an internal quantum efficiency (IQE) of 84.01%, and good thermal stability at 423 K (89.7% of that at room temperature). Doping with Yb3+/Nd3+ ions helps achieve an efficient energy transfer from the Cr3+ to Yb3+/Nd3+ ions with excellent thermal stability. NIR pc-LED devices prepared using YSAO:Cr3+,Yb3+ and YSAO:Cr3+,Nd3+ can achieve high NIR output powers of 46.37 and 42.82 mW at 100 mA and photoconversion efficiencies of 20.27 and 18.84% at a driving current of 20 mA, respectively. Furthermore, the NIR pc-LED package demonstrated excellent capability for penetrating biological tissues, effectively distinguishing between pork, chicken, and beef. These results suggest that the phosphors can be utilized for non-destructive monitoring applications.

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通过 Cr3+ 和 Yb3+/Nd3+ 共激活近红外荧光粉中的 Cr3+-Yb3+/Nd3+ 能量转移实现可调发光,用于非破坏性分析
对于高效的近红外(NIR)发射器而言,调整其发光特性对于扩展其光学应用非常重要。通过对石榴石型无机物的基础研究,开发出了一种新型近红外荧光粉 Y3ScAl4O12:Cr3+ (YSAO:Cr3+),其发射波长范围为 600 至 950 nm,内部量子效率 (IQE) 为 84.01%,在 423 K 下具有良好的热稳定性(为室温下的 89.7%)。掺杂 Yb3+/Nd3+ 离子有助于实现从 Cr3+ 到 Yb3+/Nd3+ 离子的高效能量转移,并具有出色的热稳定性。使用 YSAO:Cr3+,Yb3+ 和 YSAO:Cr3+,Nd3+ 制备的近红外 pc-LED 器件在 100 mA 电流下的近红外输出功率分别为 46.37 mW 和 42.82 mW,在 20 mA 驱动电流下的光电转换效率分别为 20.27% 和 18.84%。此外,近红外 pc-LED 封装显示出卓越的穿透生物组织的能力,可有效区分猪肉、鸡肉和牛肉。这些结果表明,荧光粉可用于非破坏性监测应用。
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来源期刊
Inorganic Chemistry Frontiers
Inorganic Chemistry Frontiers CHEMISTRY, INORGANIC & NUCLEAR-
CiteScore
10.40
自引率
7.10%
发文量
587
审稿时长
1.2 months
期刊介绍: The international, high quality journal for interdisciplinary research between inorganic chemistry and related subjects
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