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Novel broadband NIR phosphors Y2Mg2Ga2Si2O12:xCr3+ for NIR LED applications.
- Source :
- Dalton Transactions: An International Journal of Inorganic Chemistry; 5/21/2023, Vol. 52 Issue 19, p6569-6577, 9p
- Publication Year :
- 2023
-
Abstract
- The Cr<superscript>3+</superscript>-doped near-infrared (NIR) phosphors have been extensively investigated owing to their promising applications in biomedicine, food safety detection, and night vision surveillance. However, achieving broadband (FWHM > 160 nm) NIR emission is still challenging. In this paper, novel Y<subscript>2</subscript>Mg<subscript>2</subscript>Ga<subscript>2−x</subscript>Si<subscript>2</subscript>O<subscript>12</subscript>:xCr<superscript>3+</superscript> (YMGS:xCr<superscript>3+</superscript>, x = 0.005–0.08) phosphors were prepared by a high-temperature solid-state reaction. The crystal structure, photoluminescence properties of the phosphor, and the device performance of a pc-LED were researched in detail. When excited at 440 nm, the YMGS:0.04Cr<superscript>3+</superscript> phosphor exhibited broadband emission in the range of 650–1000 nm, peaking at 790 nm with a full width at half-maximum (FWHM) of up to 180 nm. The wide FWHM of YMGS:Cr<superscript>3+</superscript> is conducive to its extensive application in NIR spectroscopic technology. In addition, the YMGS:0.04Cr<superscript>3+</superscript> phosphor could maintain 70% of the initial emission intensity at 373 K. By combining the commercial blue chip with the YMGS:0.04Cr<superscript>3+</superscript> phosphor, the resulting NIR pc-LED demonstrated a near-infrared output power of 14 mW with a photoelectric conversion efficiency of 5% at a drive current of 100 mA. This work provides a broadband emission NIR phosphor option for NIR pc-LED devices. [ABSTRACT FROM AUTHOR]
- Subjects :
- PHOSPHORS
NIGHT vision
TERBIUM
CRYSTAL structure
FOOD safety
Subjects
Details
- Language :
- English
- ISSN :
- 14779226
- Volume :
- 52
- Issue :
- 19
- Database :
- Complementary Index
- Journal :
- Dalton Transactions: An International Journal of Inorganic Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 163740998
- Full Text :
- https://doi.org/10.1039/d3dt00469d