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Cr3+‐Doped Sc‐Based Fluoride Enabling Highly Efficient Near Infrared Luminescence: A Case Study of K2NaScF6:Cr3+
Laser & Photonics Reviews ( IF 11.0 ) Pub Date : 2020-12-23 , DOI: 10.1002/lpor.202000410
Enhai Song 1 , Hong Ming 1 , Yayun Zhou 1 , Fanquan He 1 , Jiachang Wu 1 , Zhiguo Xia 1 , Qinyuan Zhang 1
Affiliation  

The development of highly efficient and thermally stable broadband near‐infrared (NIR) luminescence materials is a great challenge to advance the next‐generation smart NIR light source. Benefitting from the low phonon energy and relatively weak electron phonon coupling effect of the fluoride, K2NaScF6:Cr3+ phosphor is designed and obtained, which demonstrates a full width at half maximum of 100 nm peaking at ≈765 nm. Upon blue light excitation, the phosphor exhibits a high quantum efficiency of 74% and its emission intensity at 150 °C can keep 89.6% of the initial value at 25 °C. An NIR output power of 159.72 mW (input electric power, 1094 mW) with a high photoelectric conversion efficiency of ≈14.60%, light‐emitting diode (LED) device is presented based on this K2NaScF6:Cr3+ phosphor. Furthermore, applying the high‐power NIR phosphor‐converted LED device as lighting source, clear and quick veins imaging and recognition in fingers, palm, wrist, and arm of the human hand are first realized, suggesting K2NaScF6:Cr3+ phosphor has high promise in practical applications.

中文翻译:

Cr3 +掺杂的Sc基氟化物可实现高效的近红外发光:K2NaScF6:Cr3 +的案例研究

高效,热稳定的宽带近红外(NIR)发光材料的开发是推进下一代智能NIR光源的巨大挑战。得益于氟化物K 2 NaScF 6:Cr 3+的低声子能量和相对弱的电子声子耦合效应设计并获得了荧光粉,该荧光粉显示了在约765 nm处达到峰值的100 nm半峰全宽。在蓝光激发下,磷光体显示出74%的高量子效率,并且其在150°C时的发射强度可以在25°C下保持初始值的89.6%。基于这种K 2 NaScF 6:Cr 3+荧光粉,提出了一种NIR输出功率为159.72 mW(输入功率为1094 mW),高光电转换效率约为14.60%的发光二极管(LED)器件。此外,以大功率近红外荧光粉转换LED器件为光源,首先实现了人的手指,手掌,手腕和手臂清晰,快速的静脉成像和识别,建议采用K 2 NaScF 6。:Cr 3+荧光粉在实际应用中具有很高的前景。
更新日期:2021-02-11
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