Issue 14, 2025

Broadband and high internal quantum efficiency near-infrared phosphors obtained utilizing a chemical unit co-substitution strategy for plant lighting

Abstract

Near-infrared phosphor-converted light-emitting diodes (NIR pc-LEDs) have been widely used in plant cultivation. However, exploring NIR phosphors with specific wavelengths and high efficiency is still the main task. In this paper, a NIR phosphor, Lu3Ga5−2xMgxGexO12 (LGMG):0.05Cr3+, with an emission center wavelength of 726 nm was investigated. After employing the co-substitution strategy, it was found that the strength of the crystal field in the vicinity of Cr3+ gradually weakened, resulting in broadening of the emission spectrum to the full width at half maximum (FWHM) of 155 nm. Notably, the developed phosphors have high IQE values and relatively better thermal stability. After optimization, the absorption spectrum of the obtained broadband near-infrared luminescent phosphor showed a high degree of matching with the absorption spectrum of the phytochrome PFR. NIR pc-LEDs devices were successfully prepared by combining the LGMG:Cr3+ phosphor with commercialized blue LED chips. This phosphor has potential applications in plant lighting to promote plant growth.

Graphical abstract: Broadband and high internal quantum efficiency near-infrared phosphors obtained utilizing a chemical unit co-substitution strategy for plant lighting

Supplementary files

Article information

Article type
Paper
Submitted
17 Jan 2025
Accepted
21 Feb 2025
First published
06 Mar 2025

J. Mater. Chem. C, 2025,13, 7343-7351

Broadband and high internal quantum efficiency near-infrared phosphors obtained utilizing a chemical unit co-substitution strategy for plant lighting

M. Lyu, J. Cao, B. Tang, T. Li, M. Wei, H. Zhang, X. Zhang, M. Zheng, M. S. Molokeev and B. Lei, J. Mater. Chem. C, 2025, 13, 7343 DOI: 10.1039/D5TC00206K

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