Efficient broadband near-infrared luminescence of Cr3+ doped fluoride K2NaInF6 and its NIR-LED application toward veins imaging

被引：110

作者：

Wu, Zixuan ^{[1
]}

Han, Xinxin ^{[1
,2
]}

Zhou, Yayun ^{[2
]}

Xing, Ke ^{[1
]}

Cao, Sheng ^{[1
]}

Chen, Li ^{[1
]}

Zeng, Ruosheng ^{[1
]}

Zhao, Jialong ^{[1
]}

Zou, Bingsuo ^{[1
]}

机构：

[1] Guangxi Univ, Sch Phys Sci & Technol, MOE Key Lab New Proc Technol Nonferrous Met & Mat, Guangxi Key Lab Proc Nonferrous Met & Featured Ma, Nanning 530004, Peoples R China

[2] South China Univ Technol, State Key Lab Luminescent Mat & Devices, Guangdong Prov Key Lab Fiber Laser Mat & Appl Tec, Guangzhou 510641, Peoples R China

来源：

CHEMICAL ENGINEERING JOURNAL | 2022年 / 427卷

关键词：

Fluoride phosphor; Broadband near-infrared; High power NIR LED; Biological imaging; K2NaInF6; Cr3+; PHOSPHORS; PHOTOLUMINESCENCE; EMISSION;

D O I：

10.1016/j.cej.2021.131740

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

High performance broadband Near-infrared (NIR) phosphors with high efficiency and excellent thermal stability are highly demanded for constructing the next generation of NIR radiation sources. Herein, a broadband NIR emitting fluoride phosphor K2NaInF6:Cr3+ peaking at 774 nm with a Full width at half maximum (FWHM) of 116 nm (1906 cm-1) was demonstrated. A high Internal quantum efficiency (IQE) value of 70.2% can be obtained in the as-synthesized K2NaInF6:Cr3+ phosphor. Additionally, benefiting from the relatively weak electron phonon coupling effect, the phosphor also exhibits excellent anti-thermal quenching behavior with the emission intensity at 150 degrees C retaining 78.3% of that at room temperature. A high power NIR pc-LED with NIR radiant flux of 492.85 mW@1050 mA is obtained by combing the as-synthesized K2NaInF6:Cr3+ phosphor and a blue LED chip. Utilizing this high power NIR pc-LED as NIR radiation source, high-resolution human hand veins imaging is realized with the assistance of a NIR camera, which indicates that K2NaInF6:Cr3+ phosphor has high potential in biological applications.

引用

页数：7

共 39 条

[1] Investigation of Cr3+ ions in Cs2NaGaF6 single crystals by optical spectroscopy [J].