Achieving broadband near-infrared emission with superior anti-thermal quenching by optimizing excited-state population of Cr3+ in Gd3ScGa4O12 garnet phosphors

Materials Horizons, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 1, 2024

A record-breaking anti-thermal quenching of broadband NIR emission (198%@543 K) is achieved in a Cr 3+ -activated garnet phosphor via excited-state population optimization.

Language: Английский

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Realizing efficient broadband near-infrared emission and multimode photoluminescence switching via coordination structure modulation in Sb³⁺-doped 0D organic metal chlorides

Materials Horizons, Journal Year: 2024, Volume and Issue: 11(9), P. 2230 - 2241

Published: Jan. 1, 2024

We developed three NIR emitters of Sb 3+ -doped 0D organic metal chlorides and demonstrated their night vision applications in vision. One shows tunable emission characteristics quintuple-mode fluorescence anti-counterfeiting information encryption.

Language: Английский

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Highly Efficient and Thermally Stable Broadband NIR Phosphors with Superlong Afterglow Performance and their Multifunctional Applications

Laser & Photonics Review, Journal Year: 2024, Volume and Issue: 18(10)

Published: May 16, 2024

Abstract Near‐infrared (NIR) phosphor‐converted light‐emitting diodes (pc‐LEDs) are considered as promising next‐generation light sources for optoelectronic and biomedical applications. Nevertheless, NIR phosphors with large bandwidths, long emission peaks, high external quantum efficiencies (EQEs) valuable thermal stabilities challenging to develop. Herein, this study reports a novel gallium germanate host, Ga 3 Al Ge 2 O 13 (GAGO), bandgap rigid host lattice Cr 3+ ion doping. The blue LED excitable GAGO:0.012Cr phosphor can produce broadband maximum intensity at 816 nm full‐width half‐maximum (FWHM) of 187 nm. Notably, the also exhibits an excellent EQE 35.8% perfect stability (I 423 K /I 298 = 67.4%). Moreover, attractive afterglow duration more than 24 h is achieved in GAGO:0.004Cr phosphor. type origin traps discussed, possible persistent luminescent (LPL) mechanism proposed. Finally, pc‐LED based on fabricated. results demonstrate that obtained show great potential use night vision, nondestructive detection, bioimaging information encryption. This provides new insight into development materials efficiency, good extraordinary performance.

Language: Английский

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LiGaP2O7:Cr3+, Yb3+ phosphors for broadband NIR LEDs toward multiple applications

Journal of Alloys and Compounds, Journal Year: 2023, Volume and Issue: 956, P. 170311 - 170311

Published: April 26, 2023

Language: Английский

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Efficient Near-Infrared Luminescence with Near-Unity Photoluminescence Quantum Yield in Erbium-Doped Double Perovskites Cs₂NaYCl₆ under Green Light Excitation

Chemistry of Materials, Journal Year: 2024, Volume and Issue: 36(5), P. 2483 - 2494

Published: Feb. 27, 2024

Lanthanide (Ln3+)-doped double perovskites to achieve near-infrared (NIR) emission have been demonstrated be an effective strategy. However, these emitters generally exhibit low efficiencies, which limits further applications. Herein, we synthesized Er3+-doped Cs2NaYCl6 via a hydrothermal reaction. Steady-state and transient fluorescence spectra show that there is pronounced cross-relaxation between neighboring Er3+, thus boosting the NIR with photoluminescence quantum efficiency (PLQE) of 93 ± 2% (NIR-II region ∼87%). Moreover, ferromagnetic coupling can enhance absorption intensity Er3+; thus, strongest witnessed direct excitation at 520 nm. The remarkable PLQE ideal wavelength make Cs2NaYCl6:Er3+ candidate for next generation light sources. In addition, Nd3+ Yb3+ were also doped in successfully, their respective values are 51 3% 30 2%, respectively. Particularly, Ln3+-doped 440 K maintain 103% (Er3+), 91% (Nd3+), 112% (Yb3+) initial 300 K. Their admirable properties enable us demonstrate application as-synthesized compounds night vision nondestructive testing. Therefore, our findings one most promising emitters.

Language: Английский

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Rational design for broad near-infrared emission from a two-sited Rb₂LiAlF₆:Cr³⁺ phosphor with high efficiency and thermal stability for spectroscopic applications

Inorganic Chemistry Frontiers, Journal Year: 2024, Volume and Issue: 11(9), P. 2718 - 2725

Published: Jan. 1, 2024

A comparative investigation of broadband near-infrared luminescence from two different occupation sites in Rb 2 LiAlF 6 :Cr 3+ with high efficiency and excellent thermal stability.

Language: Английский

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An efficient and thermally stable source with Cr3+ near-infrared luminescence for non-destructive testing applications

Materials Today Chemistry, Journal Year: 2024, Volume and Issue: 35, P. 101918 - 101918

Published: Jan. 1, 2024

Language: Английский

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Highly‐Efficiency Far‐Red Emission in Cr³⁺ Activated Ca_1.8Mg_1.2Al₂Ge₃O₁₂ toward Plant Precise Lighting

Advanced Optical Materials, Journal Year: 2024, Volume and Issue: 12(17)

Published: Feb. 25, 2024

Abstract Far‐red (FR) region (beyond 700 nm) lighting sources possess special potential for plant lighting. However, it remains a challenge to obtain high‐performance Cr 3+ ‐doped FR phosphors. This study developed phosphor, Ca 1.8 Mg 1.2 Al 2 Ge 3 O 12 :Cr (CMAGG: ), using the cation substitution strategy. Under 438 nm blue light excitation, phosphors display emission centered at 720 with full width half maximum (FWHM) of 91 nm. Benefit from favorable match phytochrome (P fr phosphor is combined InGaN chips create phosphor‐converted light‐emitting diode (pc‐LED), which used in Italian lettuce growth experiments and results shown 15% increase fresh weight 6.5% dry weight. Notably, supplemental modulated its morphology. The this will be useful further research on novel meet precise spectral requirements growth.

Language: Английский

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Multifunctional Near-Infrared Phosphors Cr³⁺/Ni²⁺ Codoped Mg₃Ga₂GeO₈ Based on Energy Transfer from Cr³⁺ to Ni²⁺

Inorganic Chemistry, Journal Year: 2024, Volume and Issue: unknown

Published: July 24, 2024

Currently, near-infrared (NIR) light-emitting materials have been widely used in many fields, such as night vision, bioimaging, and nondestructive analysis. However, it is difficult to achieve multifunction certain NIR light emitting phosphor. Herein, we propose a new phosphor Mg

Language: Английский

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Multifunctional Applications Enabled by Tunable Multi-Emission and Ultra-Broadband VIS-NIR Luminescence via Energy Transfer in Sn²⁺/Mn²⁺-Doped Lead-Free Zn-Based Metal Halides

Materials Horizons, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Metal halides are widely applied in solid-state lighting (SSL), optoelectronic devices, information encryption, and near-infrared (NIR) detection due to their superior photoelectric properties tunable emission. However, single-component phosphors that can be efficiently excited by light-emitting diode (LED) chips cover both the visible (VIS) NIR emission regions still very rare. To address this issue, (TPA)2ZnBr4:Sn2+/Mn2+ (TPA = [(CH3CH2CH2)4N]+) were synthesized using solvent evaporation method. The Sn2+ doping significantly enhances luminescence of (TPA)2ZnBr4, shifts weak blue light efficient emissions red zones. Spectroscopic studies density functional theory (DFT) calculations reveal attributed different levels 3P1-1S0 [SnBr4]2- tetrahedron caused Jahn-Teller distortion. More importantly, energy transfer from Mn2+ enables ultra-broadband VIS-NIR across 400-1000 nm range, with excitation-dependent characteristics. These suggest has great potential as a high-performance, luminescent material for applications general lighting, source, anti-counterfeiting labels.

Language: Английский

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