Efficient and Thermally Stable Cr3+‐Doped Phosphor Achieved by Cation Substitution: Plant Lighting Application

Far‐red phosphor‐converted light‐emitting diodes are receiving increasing attention as an essential component of the next‐generation plant‐growth lights. However, developing far‐red phosphors with high quantum efficiency, low thermal quenching, and suitable emitting wavelength is crucial and urgent....

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Veröffentlicht in:Advanced optical materials 2024-11, Vol.12 (33), p.n/a
Hauptverfasser: Dai, Xiangyi, Zou, Xikun, Wei, Mingkai, Zhang, Xuejie, Dong, Bin, Li, Xinming, Cong, Yan, Li, Dongyu, Zhao, Jie, Molokeev, Maxim S., Lei, Bingfu
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container_issue 33
container_start_page
container_title Advanced optical materials
container_volume 12
creator Dai, Xiangyi
Zou, Xikun
Wei, Mingkai
Zhang, Xuejie
Dong, Bin
Li, Xinming
Cong, Yan
Li, Dongyu
Zhao, Jie
Molokeev, Maxim S.
Lei, Bingfu
description Far‐red phosphor‐converted light‐emitting diodes are receiving increasing attention as an essential component of the next‐generation plant‐growth lights. However, developing far‐red phosphors with high quantum efficiency, low thermal quenching, and suitable emitting wavelength is crucial and urgent. Herein, a new far‐red phosphor BaY2Ga3.9GeO12:0.1Cr3+ with high internal quantum efficiency (98%) and thermal stability (90.2%@423K) is obtained via the substitution of CaO8 with bigger BaO8 dodecahedrons, which is attributed to variations in the lattice environment of Cr3+. Meanwhile, controllable emission tuning from 780 to 708 nm and enhanced luminescence performance are achieved due to the cation substitution can reduce the production of Cr4+ and modulate the lattice occupancy of the Cr3+ ions, and the enhancement of metal‐ligand interactions resulting in the enhancement of the crystal field and the breaking of the forbidden d‐d transition of Cr3+. The proof‐of‐concept demonstration of the pakchoi lighting experiment reveals the great potential of BaY2Ga3.9GeO12:Cr3+ phosphor in stimulating plant growth and pushing the yield. These results demonstrate the feasibility of cationic substitution to optimize the optical performance of Cr3+‐doped phosphors, providing an alternative strategy for designing efficient far‐red light sources for plant lighting. Far‐red phosphor‐converted LEDs are vital for next‐generation plant‐growth lights. A new far‐red phosphor BaY2Ga3.9GeO12:Cr3+ shows high quantum efficiency (98%) and thermal stability (90.2%@423K). Cationic substitution tunes emission (780–708 nm) and enhances luminescence by improving Cr3+ ion lattice occupancy. This phosphor effectively stimulates plant growth, offering an efficient design for far‐red light sources.
doi_str_mv 10.1002/adom.202401608
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However, developing far‐red phosphors with high quantum efficiency, low thermal quenching, and suitable emitting wavelength is crucial and urgent. Herein, a new far‐red phosphor BaY2Ga3.9GeO12:0.1Cr3+ with high internal quantum efficiency (98%) and thermal stability (90.2%@423K) is obtained via the substitution of CaO8 with bigger BaO8 dodecahedrons, which is attributed to variations in the lattice environment of Cr3+. Meanwhile, controllable emission tuning from 780 to 708 nm and enhanced luminescence performance are achieved due to the cation substitution can reduce the production of Cr4+ and modulate the lattice occupancy of the Cr3+ ions, and the enhancement of metal‐ligand interactions resulting in the enhancement of the crystal field and the breaking of the forbidden d‐d transition of Cr3+. The proof‐of‐concept demonstration of the pakchoi lighting experiment reveals the great potential of BaY2Ga3.9GeO12:Cr3+ phosphor in stimulating plant growth and pushing the yield. These results demonstrate the feasibility of cationic substitution to optimize the optical performance of Cr3+‐doped phosphors, providing an alternative strategy for designing efficient far‐red light sources for plant lighting. Far‐red phosphor‐converted LEDs are vital for next‐generation plant‐growth lights. A new far‐red phosphor BaY2Ga3.9GeO12:Cr3+ shows high quantum efficiency (98%) and thermal stability (90.2%@423K). Cationic substitution tunes emission (780–708 nm) and enhances luminescence by improving Cr3+ ion lattice occupancy. 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subjects cationic substitution
Cations
Controllability
Cr3+‐doped phosphor
Crystal lattices
garnet
high efficiency
Light emitting diodes
Light sources
Lighting
Phosphors
Plant layout
plant light
Quantum efficiency
Substitutes
Thermal stability
Trivalent chromium
title Efficient and Thermally Stable Cr3+‐Doped Phosphor Achieved by Cation Substitution: Plant Lighting Application
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