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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Constructing Broadband Near‐Infrared Garnet Emitters CaGd₂Ga₄SiO₁₂:Cr³⁺ with Unity Quantum Efficiency and High Thermal Stability for Versatile Applications

Small, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 4, 2025

Abstract The pursuit of broadband near‐infrared (NIR) phosphors for next‐generation smart NIR light sources has garnered extensive interest. However, developing efficiently excitable by blue to produce thermally stable and highly efficient emission surpassing 830 nm remains a formidable challenge. Herein, novel CaGd 2 Ga 4 SiO 12 garnet is reported, designed through structure reconstruction approach host Cr 3+ ions high‐performance phosphor. By strategically introducing Jahn–Teller distortion at the octahedral sites via chemical pressure, endowed with super‐broadband spanning 600–1300 centered 837 nm. full‐width half maximum (FWHM) varies from 187 223 across doping concentrations, highest internal quantum efficiency (IQE) 99.01%. Remarkable luminescence thermal stability (90.37%@423 K) bolstered weak electron‐phonon coupling (EPC) effect trap‐mediated energy compensation, result heterovalent ion substitutions in dodecahedral tetrahedral sites. Furthermore, prototype phosphor‐converted light‐emitting diode (pc‐LED) fabricated, delivering substantial output power 287.7 mW 1100 mA conversion (PCE) 24.4% 30 mA, enabling impressive performance versatile applications, including component analysis, non‐destructive testing, imaging, night vision.

Language: Английский

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Cr3+-doped Na2CaSn2Ge3O12 garnet showing broadband near-infrared emission at 820 nm with zero thermal quenching and near-unity quantum yield

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 499, P. 156274 - 156274

Published: Sept. 30, 2024

Language: Английский

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Synthesis, optical properties, and applications of Eu3+, Na+-doped high-color-purity Sr3MgNb2O9 red phosphors for w-LEDs and the detection of latent fingerprints

Inorganic Chemistry Communications, Journal Year: 2024, Volume and Issue: 168, P. 112922 - 112922

Published: July 30, 2024

Language: Английский

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Efficient and Thermally Stable Cr3+-activated Germanate Phosphor for Thermometry, Plant Cultivation, and Near-Infrared Light-Emitting Diode Applications

Journal of Alloys and Compounds, Journal Year: 2025, Volume and Issue: unknown, P. 179931 - 179931

Published: March 1, 2025

Language: Английский

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Broadband near-infrared mechanoluminescence in Cr3+ doped Mg3Ga2GeO8

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 498, P. 155040 - 155040

Published: Aug. 23, 2024

Language: Английский

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Broadband Shortwave Infrared-Emitting Cr³⁺- and Ni²⁺-Codoped Y₃Al₂Ga₃O₁₂ Phosphor with Excellent Thermal Stability for Multifunctional Applications

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 17(1), P. 1509 - 1521

Published: Dec. 20, 2024

Shortwave infrared (SWIR)-emitting materials have emerged as superior light sources with increasing demand for potential applications in noninvasive analysis, night vision illumination, and medical diagnosis. For developing next-generation SWIR phosphor-converted light-emitting diodes (pc-LEDs), the scarcity of intense blue-light-pumped broadband luminescent poor thermal stability current Ni2+-activated phosphors are ongoing challenges. Here, a blue-light-excitable (440 nm) Y3Al2Ga3O12:Cr3+,Ni2+ phosphor ultrawide emission centered at ∼1430 nm (FWHM ∼264 is reported. The efficient Cr3+ → Ni2+ energy transfer exploited remarkable enhancement 18-fold under blue-light excitation. Significantly, excellent (90% 440 K) band obtained codoped which best among reported phosphors. Besides, experimental techniques (XANES EXAFS) density functional theory calculations employed to investigate local structure propose [GaO6] octahedrons favorable occupation sites Ni2+/Cr3+ ions. A pc-LED fabricated using blue chip proof concept invisible illumination technology, nondestructive spectroscopic anticounterfeiting, imaging applications. This work offers effective insights into transfer-assisted presents thermally robust Cr3+-Ni2+-codoped designing future mini-SWIR pc-LEDs spectroscopy

Language: Английский

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Precise Emission Bandgap Engineering in Hybrid Perovskite: An ITC Approach

Journal of Alloys and Compounds, Journal Year: 2025, Volume and Issue: unknown, P. 180114 - 180114

Published: April 1, 2025

Language: Английский

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Luminous Thermal Stability and Versatile Applications of Red Emitting Ba3Y4O9: Eu3+ Phosphor in W-LEDs, Forensic Science and Security Technologies

Journal of Luminescence, Journal Year: 2025, Volume and Issue: unknown, P. 121220 - 121220

Published: April 1, 2025

Language: Английский

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Highly thermal-stable broadband near-infrared emission of Cr3+ doped spinel CdGa2O4 phosphors

Journal of Luminescence, Journal Year: 2024, Volume and Issue: 275, P. 120825 - 120825

Published: Aug. 6, 2024

Language: Английский

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