Ultra-broadband near-infrared phosphor La2CaTa Zr(1-)O6:Cr3+ for phosphor-converted light-emitting diodes

Guo, Ganggang; Xi, Qingkai; Yin, Tao; Nie, J.; Zhong, Yang; Guan, Li; Liu, Zhenyang; Wang, Fenghe; Li, Xu

doi:10.1016/j.jallcom.2023.171459

Journal of Alloys and Compounds

2023

DOI: 10.1016/j.jallcom.2023.171459

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Ultra-broadband near-infrared phosphor La2CaTa Zr(1-)O6:Cr3+ for phosphor-converted light-emitting diodes

Ganggang Guo

Qingkai Xi

Tao Yin

et al.

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Cited by 13 publications

References 46 publications

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High Output Power and High Quantum Efficiency in Novel NIR Phosphor MgAlGa_0.7B_0.3O₄:Cr³⁺ with Profound FWHM Variation

Zhong,

Xu,

et al. 2023

Advanced Materials

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There is strong demand for ultraefficient near‐infrared (NIR) phosphors with adjustable emission properties for next‐generation intelligent NIR light sources. Designing phosphors with large full‐width at half‐maximum (FWHM) variations is challenging. In this study, novel near‐ultraviolet light‐emitting diode (LED)‐excited NIR phosphors, MgAlGa0.7B0.3O4:Cr3+ (MAGBO:Cr3+), with three emission centers achieve ultra‐narrowband (FWHM = 29 nm) to ultra‐broadband (FWHM = 260 nm) emission with increasing Cr3+ concentration. Gaussian fitting and decay time analysis reveal the alteration in the FWHM, which is attributed to the energy transfer occurring between the three emission centers. The distinct thermal quenching behaviors of the three emission centers are revealed through the temperature‐dependent decay times. The ultra‐broadband NIR phosphor MAGBO:0.05Cr3+ exhibits high thermal stability (85%, 425 K) and exceptional external quantum efficiency of 68.5%. An NIR phosphor‐converted LED (pc‐LED) is fabricated using MAGBO:0.05Cr3+ phosphor, exhibiting a remarkable NIR output power of 136 mW at 600 mA in ultra‐broadband NIR pc‐LEDs. This study describes the preparation of highly efficient phosphors and provides a further understanding of the tunable FWHM, which is vital for high‐performance NIR phosphors with versatile applications.

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High Output Power and High Quantum Efficiency in Novel NIR Phosphor MgAlGa_0.7B_0.3O₄:Cr³⁺ with Profound FWHM Variation

Zhong,

Xu,

et al. 2023

Advanced Materials

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Simultaneously Possessing High Quantum Efficiency and Thermal Robustness in a Near‐Infrared Emitting ZnAlB_(1‐_x₎Ga_xO₄:Cr³⁺ Phosphor

Lim,

Wang,

Kang

et al. 2024

Laser & Photonics Reviews

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Near‐infrared (NIR) phosphors are a vital component of phosphor‐converted light‐emitting diodes (pc‐LEDs), with simultaneous high quantum efficiency and thermal stability being essential attributes for optimal performance. In this paper, a novel ZnAlB(1‐x)GaxO4:0.05Cr3+ system is designed by gradually substituting B with Ga. Surprisingly, a significant enhancement in photoluminescence performance is observed, reaching peak efficiency at x = 1. Further development led to a series of ZnAlGaO4:yCr3+ (ZAGO:yCr3+) phosphors, exhibiting variable full width at half maximum (FWHM) ranging from 32 to 163 nm with increasing Cr3+ content, attributed to energy transfer between two Cr3+ emission centers. Among these, ZAGO:0.05Cr3+ emerges as the optimal phosphor, boasting a high internal/external quantum efficiency of 80%/34% with a FWHM of 80 nm. Notably, this phosphor demonstrates anti‐thermal quenching behavior (125.53% @ 423 K), with its exceptional thermal stability elucidated through the defect level model. The fabricated NIR pc‐LEDs featuring ZAGO:Cr3+ phosphors show great prospect in multifunctional applications in plant cultivation, night vision, non‐destructive analysis and veins imaging.

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Structure regulation and luminescence improvement of Gd3Ga5O12:Cr3+: An anti-thermal quenching NIR phosphor for multifunctional applications

Zhang,

Feng,

et al. 2024

Ceramics International

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Ultra-broadband near-infrared phosphor La2CaTa Zr(1-)O6:Cr3+ for phosphor-converted light-emitting diodes

Cited by 13 publications

References 46 publications

High Output Power and High Quantum Efficiency in Novel NIR Phosphor MgAlGa_0.7B_0.3O₄:Cr³⁺ with Profound FWHM Variation

High Output Power and High Quantum Efficiency in Novel NIR Phosphor MgAlGa_0.7B_0.3O₄:Cr³⁺ with Profound FWHM Variation

Simultaneously Possessing High Quantum Efficiency and Thermal Robustness in a Near‐Infrared Emitting ZnAlB_(1‐_x₎Ga_xO₄:Cr³⁺ Phosphor

Structure regulation and luminescence improvement of Gd3Ga5O12:Cr3+: An anti-thermal quenching NIR phosphor for multifunctional applications

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Ultra-broadband near-infrared phosphor La2CaTa Zr(1-)O6:Cr3+ for phosphor-converted light-emitting diodes

Cited by 13 publications

References 46 publications

High Output Power and High Quantum Efficiency in Novel NIR Phosphor MgAlGa0.7B0.3O4:Cr3+ with Profound FWHM Variation

High Output Power and High Quantum Efficiency in Novel NIR Phosphor MgAlGa0.7B0.3O4:Cr3+ with Profound FWHM Variation

Simultaneously Possessing High Quantum Efficiency and Thermal Robustness in a Near‐Infrared Emitting ZnAlB(1‐x)GaxO4:Cr3+ Phosphor

Structure regulation and luminescence improvement of Gd3Ga5O12:Cr3+: An anti-thermal quenching NIR phosphor for multifunctional applications

Contact Info

Product

Resources

About

High Output Power and High Quantum Efficiency in Novel NIR Phosphor MgAlGa_0.7B_0.3O₄:Cr³⁺ with Profound FWHM Variation

High Output Power and High Quantum Efficiency in Novel NIR Phosphor MgAlGa_0.7B_0.3O₄:Cr³⁺ with Profound FWHM Variation

Simultaneously Possessing High Quantum Efficiency and Thermal Robustness in a Near‐Infrared Emitting ZnAlB_(1‐_x₎Ga_xO₄:Cr³⁺ Phosphor