Broadband near-infrared BaMSi3O9:Cr3+ (M = Zr, Sn, Hf) phosphors for light-emitting diode applications. Issue 24 (5th November 2021)

• Record Type: Journal Article
• Authors: Zhang, Yan; Liang, Yanjie; Miao, Shihai; Chen, Dongxun; Yan, Shao; Liu, Jingwei
• Is Part Of: Inorganic chemistry frontiers. Volume 8:Issue 24(2021)
• Page Start: 5186
• Page End: 5194
• Publication Date: 2021-11-05
• Subjects: Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/d1qi01082d
• Languages: English
• ISSNs: 2052-1553

Abstract

Abstract : Cr 3+ -Doped BaMSi3 O9 (M = Zr, Sn, Hf) NIR-emitting phosphors have been developed, which exhibit a broad NIR emission band over 650–1200 nm with a tunable band maximum longer than 800 nm and a FWHM of more than 155 nm upon blue light excitation. Abstract : A series of Cr 3+ -doped BaMSi3 O9 (M = Zr, Sn, Hf) near-infrared emitting phosphors with tunable luminescence properties have been successfully synthesized by using a simple solid-state reaction method. The developed BaMSi3 O9 :Cr 3+ phosphors show a broad near-infrared emission band ranging from 650 nm to 1200 nm with a peak wavelength longer than 800 nm and a full width at half maximum (FWHM) of more than 155 nm upon blue light excitation. The optimized phosphor also demonstrates good thermal stability, whose emission intensity at 150 °C can retain about 59% of its initial intensity at room temperature. The near-infrared LED prototypes constructed by combining the BaMSi3 O9 :Cr 3+ phosphor with a blue LED chip give a maximum output power of 12.19 mW at a drive current of 320 mA. By using the fabricated near-infrared LED device as a lighting source, night-vision lighting and blood vessel imaging of human fingers and arms are successfully realized, demonstrating the great potential of BaMSi3 O9 :Cr 3+ phosphors for near-infrared LED applications.