Issue 13, 2024

Tunable broadband near-infrared luminescence from Cr3+-doped gallium oxide-based phosphors for advanced sensing and LED applications

Abstract

Near-infrared (NIR) phosphor-converted light emitting diodes (pc-LEDs) highly demand broadband NIR phosphors for applications in food safety and smart detection. However, the lack of tunable NIR luminescent materials limits their development. Herein, we constructed a series of NIR Cr3+ doped Ga2O3-based materials with broadband, tunable, efficient emissions by utilizing [Zn2+–Ge4+] and [Ga3+–Ga3+] co-unit substitution. The obtained results show that the emission peak of NIR phosphors can be modulated from 713 to 765 nm. Meanwhile, the excitation peak remains in the blue light region. NIR phosphor-converted devices were prepared with 450 nm LED chips, which were studied using NIR imaging, penetration imaging, anti-counterfeiting, and pupil recognition technologies. Interestingly, NIR mechanoluminescence (ML) was realized based on the developed phosphors, which were successfully applied for non-destructive measurements of solids and in vivo bioimaging. Our study proposes a series of tunable and broadband luminescent materials and devices for NIR applications.

Graphical abstract: Tunable broadband near-infrared luminescence from Cr3+-doped gallium oxide-based phosphors for advanced sensing and LED applications

Supplementary files

Article information

Article type
Research Article
Submitted
03 Apr 2024
Accepted
15 May 2024
First published
16 May 2024

Inorg. Chem. Front., 2024,11, 3941-3949

Tunable broadband near-infrared luminescence from Cr3+-doped gallium oxide-based phosphors for advanced sensing and LED applications

G. Pan, Y. Wang, J. Wang, Z. Wu, Y. Yue, N. Lin, S. Xu and G. Bai, Inorg. Chem. Front., 2024, 11, 3941 DOI: 10.1039/D4QI00846D

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