How to Achieve Excellent Luminescence Properties of Cr Ion‐Doped Near‐Infrared Phosphors

Advanced Optical Materials, Journal Year: 2023, Volume and Issue: 11(24)

Published: Oct. 11, 2023

Abstract Transition metal chromium (Cr) ion‐doped inorganic materials exhibit distinct tunable broadband near‐infrared luminescence, and they have promising applications including nondestructive composition analysis, night vision, biomedicine, plant illumination, afterglow anticounterfeiting. Currently, the most critical issue is to optimize their full width at half maxima, thermal stability, internal/external quantum efficiency. This review systematically summarizes strategies effectively improve photoluminescence performance of near‐infrared‐emitting with transition ions. Key examples design preparation Cr luminescence different modes, a detailed discussion properties luminescent materials, summary generic help explore novel efficient Cr‐doped phosphor are provided. Next, latest developments trends in these presented for variety application scenarios. Finally, future research directions new challenges faced also discussed.

Language: Английский

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Broadband near-infrared emission in the NaInP2O7:Cr3+ phosphor for light-emitting-diode applications

Journal of Luminescence, Journal Year: 2022, Volume and Issue: 247, P. 118909 - 118909

Published: April 15, 2022

Language: Английский

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Recent progress on lanthanide-based long persistent phosphors: an overview

Journal of Materials Chemistry C, Journal Year: 2023, Volume and Issue: 11(26), P. 8649 - 8687

Published: Jan. 1, 2023

Persistent phosphors are highly explored materials due to their diverse applications (including anti-counterfeiting, information and data storage, photocatalysis, sensing, bioimaging).

Language: Английский

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Crystallization of Na₂SrGe₆O₁₄:Cr³⁺,Yb³⁺ Glass Ceramics Enabling a Watt‐Level Output Power NIR‐I/NIR‐II Lighting Source

Laser & Photonics Review, Journal Year: 2023, Volume and Issue: 18(1)

Published: Oct. 6, 2023

Abstract Near‐infrared (NIR) phosphor‐converted light‐emitting diodes (pc‐LEDs) lighting sources are applied in non‐destructive examination and illumination supplements for night monitoring. As a critical component of NIR pc‐LED, phosphors required to possess high external quantum efficiency (EQE), super thermal stability, broadband emission meet applications. Here, Na 2 SrGe 6 O 14 :Cr 3+ (NSGO:Cr) glass ceramics (GC) bulk via highly crystallization from precursor is fabricated demonstrates an ultrabroad band centered at 815 nm with full width half‐maximum (FWHM) 214 EQE 49.2%. Moreover, Yb co‐doping significantly enhances Cr → energy transfer (ET) due the stronger : F 7/2 ‐ 5/2 absorption. Benefiting ET process, Cr/Yb co‐doped GC exhibits NIR‐I/II improved stability 30.1% 65.0%. Furthermore, encapsulant‐free GC‐converted LED (GCc‐LED) prepared 52.2 mW output power photoelectric conversion (PCE) 19.4%. Under large current 600 mA, device watt‐level 922.4 PCE 9.1%. Compared conventional powder phosphors, NSGO:Cr/Yb performance can open up avenue fabrication sources.

Language: Английский

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Near-infrared Cr³⁺-doped lead-free halide perovskite microcrystals for information encryption and temperature thermometry

Journal of Materials Chemistry C, Journal Year: 2024, Volume and Issue: 12(13), P. 4627 - 4639

Published: Jan. 1, 2024

Lead-free double perovskite materials have attracted lots of interest because they can be doped with luminescence activators to modify their optical characteristics and improve photoluminescence performances.

Language: Английский

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Thermally stable fluoride phosphor Na3Sc2Li3F12:Cr3+ with broadband emission for NIR pc-LED applications

Optical Materials, Journal Year: 2024, Volume and Issue: 149, P. 115040 - 115040

Published: Feb. 14, 2024

Language: Английский

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A novel near-infrared phosphor Li_1.6Mg_1.6Sn_2.8O₈:Cr³⁺ for near-infrared spectral analysis

Journal of Materials Chemistry C, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 1, 2024

A novel near-infrared broadband phosphor Li 1.6 Mg Sn 2.8 O 8 :Cr 3+ for spectroscopy with a peak at 860 nm and an FWHM of 187 nm.

Language: Английский

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Highly Efficient and Thermally Stable NIR‐Emitting Phosphor with Largely Tunable Peak Wavelength and Bandwidth Toward NIR Spectroscopy Applications

Laser & Photonics Review, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 21, 2025

Abstract Developing tunable broadband near‐infrared (NIR) fluorescent materials with outstanding luminescence properties and superior thermal robustness remains a significant challenge for next‐generation intelligent NIR light sources. Herein, high‐performance large‐scale NIR‐emitting garnet‐type phosphor, SrLu 2 Al 3 ScSiO 12 :Cr 3+ (SLASSO:Cr ), is presented. Upon 450 nm blue excitation, SLASSO:1%Cr phosphor yields emission full width at half maximum of 108 prominent sharp peak 694 superimposed on radiation, which attributed to the co‐occupation Cr ions dominant [AlO 6 ] octahedral site (Cr1 site) subordinate [ScO (Cr2 site). Remarkably, as ⁺ content increases, red‐shift in wavelength spanning from 785 bandwidth broadening 89 152 are observed, stems weakening crystal field strength energy redistribution within Cr1 Cr2 centers regulated by formation local ‐Cr ion pairs. Notably, optimal sample boasts an excellent internal quantum efficiency 89.4% exceptional stability (97.6%@423 K). Additionally, fabricated phosphor‐converted light‐emitting diode devices demonstrate promising multi‐functional applications, including plant cultivation, night vision, bioimaging non‐destructive detection.

Language: Английский

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Efficient and Thermally Robust Broadband Near‐Infrared Emission in a Garnet Ca₃MgHfGe₃O₁₂:Cr³⁺ Phosphor

Advanced Optical Materials, Journal Year: 2022, Volume and Issue: 11(3)

Published: Dec. 3, 2022

Abstract Near‐infrared (NIR) spectroscopy based on phosphor‐converted light‐emitting‐diode (pc‐LED) has promising applications in food quality analysis, security monitoring, medical diagnosis, and bioimaging fields, stimulating the demand of developing NIR phosphors with high‐performance. Herein, a highly efficient thermally robust Ca 3 MgHfGe O 12 :Cr 3+ phosphor is discovered, which exhibits broadband emission (λ em = 800 nm) covering 700 to 1100 nm region an internal quantum efficiency as high 90.7% when excited by 460 blue light. Moreover, intensity at 423 K retains 84.5% that room temperature. The luminescence this material mainly ascribed ultrawide bandgap host, extremely weak electron–photon coupling effect, defect‐free, structural rigidity. pc‐LED device fabricated using optimized Mg 0.97 Hf Ge :0.06Cr combined 455 LED chip produces excellent output power 49.5 mW @ 11.5% under driving current 150 mA, indicates superiority well‐known ScBO same condition. Therefore, work not only provides material, but also highlights design rules for searching high‐performance materials toward applications.

Language: Английский

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Ultra-broadband near-infrared phosphor Li3Sc2(PO4)3:Cr3+ realized by two-sites occupation

Journal of Luminescence, Journal Year: 2022, Volume and Issue: 251, P. 119188 - 119188

Published: Aug. 15, 2022

Language: Английский

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