Simultaneous NIR photoluminescence and mechanoluminescence from Cr³⁺ activated MgGa₂O₄ phosphors with multifunctions for optical sensing

Journal of Materials Chemistry C, Journal Year: 2024, Volume and Issue: 12(10), P. 3654 - 3661

Published: Jan. 1, 2024

The prepared MGO:Cr 3+ phosphor has dual-mode emissions for sensing, including NIR photoluminescence and mechanoluminescence. Moreover, the developed light-emitting device functions of anti-counterfeiting biological tissue penetration.

Language: Английский

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Multi-Mode Luminescence in Smart Near-Infrared Cr³⁺/Pr³⁺ Codoped SrGa₁₂O₁₉ Phosphors Induced by Three Distinct Excitation Mechanisms

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(26), P. 33855 - 33864

Published: June 20, 2024

Near-infrared (NIR) phosphors have emerged as novel luminescent materials across various fields due to their unique advantages of high penetration and invisibility. However, there is currently a lack intelligent NIR that can achieve multimode stimuli responsive for sensing applications. In this study, we employed high-temperature solid-phase reaction incorporate Pr3+ into Cr3+-doped gallate magnetite SrGa12O19 phosphor, yielding phosphor. Also, the inherent cation vacancies defects in matrix, material not only exhibits brighter photoluminescence but also distinct mechanoluminescence at lower load. Notably, Pr3+-doped SrGa12O19:Cr3+ demonstrates extended persistent luminescence thermoluminescence effects. Finally, combined phosphor with blue LED chip develop new multifunctional pc-LED. Leveraging NIR's penetrating ability, it persist biological tissues prolonged periods, enabling optical inspection offering approach password protection anticounterfeiting measures. This solution significantly expands application potential light food quality assessment analysis.

Language: Английский

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Ultraviolet-C mechanoluminescence from NaYF4:Pr3+

Applied Physics Letters, Journal Year: 2024, Volume and Issue: 124(10)

Published: March 4, 2024

Mechanoluminescent materials, which are capable of converting some ignored mechanical stimuli like friction, pressure, and distortion into useful photons, gathering increasing attention nowadays, especially considering that a new round energy crisis is sweeping across the globe. However, wavelength mechanoluminescence (ML) reported so far overlaps seriously with solar spectrum, limiting practical applications mechanoluminescent materials to extent. Here, we report ultraviolet-C (UVC) ML from NaYF4:Pr3+ central at ∼250 nm, one shortest wavelengths for ascribed 1S0 → 3F4 transition Pr3+. After being charged by x rays, able emit under stimulation external stress. The presence UVC has been confirmed both spectrometer solar-blind camera. We confirm belongs trap-controlled via thermoluminescence related trap-filling-emptying measurements. With aid density functional theory, discuss possible mechanism NaYF4:Pr3+.

Language: Английский

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Energy Transfer‐Assisted Color Conversion of Persistent Mechanoluminescence in RhB@SiO₂/SrAl₂O₄:Eu,Dy System for Multilevel Information Encryption

Laser & Photonics Review, Journal Year: 2024, Volume and Issue: 18(8)

Published: July 2, 2024

Abstract Persistent mechanoluminescence (PML) is highly desirable for its ability to overcome transient‐emitting behavior, but applications are hindered by the limited emission wavelengths. Herein, a universal chemical interlinkage‐assisted efficient energy transfer (ET) strategy introduced achieve color conversion from green red in traditional PML materials. A straightforward route create RhB@SiO 2 /SAOED system established via covalent interlinkage depositing mesoporous silica‐encapsulated Rhodamine B (RhB) nanoparticles (RhB@SiO ) onto SrAl O 4 :Eu, Dy (SAOED) particles. The resulting exhibits high ET efficiency of 53.5%. multicolor remains visible naked eye exceeding 28 s after mechanical stimulation. With this unique demonstrates potential ranging visualized reading activities multi‐mode anticounterfeiting. This color‐conversion provides new approach high‐performance light energy‐conversion systems and may further inspire more diverse functional classical

Language: Английский

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Daylight-Activated Recoverable Mechano-luminescence Material SrGa12O₁₉: Tb3+ for Enhanced Speed Detection Applications

Ceramics International, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 1, 2025

Language: Английский

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Multilevel Trap‐Controlled Bright Mechanoluminescence of Sr/CaGa₂S₄: Eu²⁺ for Stress Sensing Applications

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

Published: Feb. 25, 2025

Abstract Brighter, recoverable, and more practical green mechanoluminescence (ML) materials are urgently required in diverse fields such as visual stress sensing advanced display lighting. Ce 3+ /Eu 2+ doping, leveraging efficient f ‐ d transition, remains one of the most promising approaches for achieving high‐performance ML. However, intense competition between afterglow ML necessitates precise control trap depths to develop high‐brightness recoverable doped trap‐controlled systems. In this work, concept multilevel is introduced into Eu ‐doped MGa 2 S 4 ( M = Sr, Ca) and, first time, elucidate mechanism underlying irradiation‐induced recovery powdered : dominated by shallow‐level traps. By optimizing activator doping concentration, depth distribution traps effectively fine‐tuned, remarkable peak intensity compared with renowned SrAl O (~57.3% , Dy ~84.3% (Sr, Ca)Al ) while minimizing interference. Finally, application potential SrGa :Eu demonstrated employing fluorescent coatings visualize crack propagation construction materials. This study explores broader applications ⁺ technologies offers novel insights strategies developing

Language: Английский

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Trap‐Assisted Mechanoluminescence in Mn²⁺‐Doped Transparent Amorphous Glass for Potential Stress Sensing

Advanced Optical Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 20, 2025

Abstract Mechanoluminescence (ML) materials have shown great promise in stress sensing, structural monitoring, information encryption etc., but are primarily based on crystalline material with limited processability, environmental stability, and optical transparency, which seriously hinder their applications. Here, a highly transparent Mn 2+ ‐doped amorphous glass system significant ML properties is designed. A composition modulation strategy proposed to engineer defects within the network structure, ensures more numerous activate of . Under repeated charging–discharging cycles, samples present remarkable repeatability recovery performance, intensity demonstrates zero‐quenching performance after being placed various solutions for 14 days. Combined Raman, EPR spectra, TL experiments, inherent relationship between traps clarified, where oxygen vacancies responsible generation ML. Based ideal high transparency designed glass, application prospects identification detection evaluated. This work provides design principle accelerate development toward versatile photonic

Language: Английский

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Defects in Inorganic Mechanoluminescent Phosphors: Insights and Impacts

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 27, 2025

Abstract Mechanoluminescence (ML), the light emission of materials in response to mechanical stimuli, has gained significant attention various fields due situ and real‐time “force light” converting ability. Defects dominate ML process, either for accommodating carriers or as sites carrier recombination. However, comprehensive discussions on ML‐based defects are rarely reported. The review opens with an exploration recent progress research, highlighting central role ML. A range defect types commonly exist firstly introduced, which aims highlight profound influences Subsequently reported defect‐dominated phosphors researched elucidate intricate relationship between specific their influence performance, shedding underlying luminescence mechanisms. Afterward, experimental techniques characterization also demonstrate how work computational modeling is confirmed act a powerful tool investigating atomistic mechanisms defect‐related processes enabling precise control materials. In conclusion, this mini‐review underscores centrality materials, offering integrated perspective potential guide future research endeavors.

Language: Английский

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Quadra-Mode Luminescent Phosphors for Force/Thermo-Encoded Information Storage and Anticounterfeiting Applications

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: unknown

Published: May 8, 2025

Multimode luminescent materials possess diverse optical characteristics and play crucial roles in photocommunication information security. Force-induced mechanoluminescence, as a distinctive excitation mode, exhibits impressive capabilities the field of anticounterfeiting storage. Here, we integrate mechanoluminescence with conventional luminescence modes (including up-conversion luminescence, down-conversion thermoluminescence (TL)) within LiNbO3 via well-tuned codoping Er3+ Pr3+. LiNbO3:Pr3+/Er3+ excitation-dependent photoluminescence (PL), enabling tunable emission colors ranging from green to red, while it shows up-converted PL emissions owing electronic transitions ions. Both TL are achieved by employing intertrap levels, where mechanical or thermal stimulation releases carriers that transfer energy Pr3+ ions, resulting red emissions. Moreover, an underlying competitive interaction between is revealed, which can be leveraged for force/thermo-encored This unique feature positions novel recordable storage labels monitor freshness perishable goods such food medicine. In addition, quadra-mode material provides multidimensional codes color distribution, indicating its significant potential advanced technology.

Language: Английский

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Enhanced ultraviolet-visible to near-infrared down-conversion of Pr3+-Yb3+ co-doped Ca2MgSi2O7 by doping with Eu2+ ions

Ceramics International, Journal Year: 2025, Volume and Issue: unknown

Published: May 1, 2025

Language: Английский

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