Multiple optical thermometry and dynamic anti-counterfeiting based on multicolor luminescence of SrY2O4:Bi3+,Er3+ phosphor

Ceramics International, Journal Year: 2024, Volume and Issue: 50(9), P. 15417 - 15425

Published: Feb. 2, 2024

Language: Английский

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Liquid nitrogen temperature to 700 K Bi3+ thermoluminescence: Toward wide-temperature-range light dosimeters for versatile anti-counterfeiting, information storage, and x-ray imaging

Applied Physics Reviews, Journal Year: 2024, Volume and Issue: 11(4)

Published: Oct. 31, 2024

Discovering light dosimeters that can function effectively from liquid nitrogen temperature to 700 K presents significant challenges. Such facilitate a range of cutting-edge applications, including anti-counterfeiting measures at low for cryo-preservation. To such discovery, stacked vacuum referred binding energy diagrams the LiYGeO4 cluster crystals have been first constructed. They offer robust method controlling both electron and hole trapping depth in crystals. Wide shifting Bi2+ Eu2+ thermoluminescence (TL) glow bands emerges 200 500 LiYxLu1-xGeO4:0.01Bi3+ LiYxLu1-xGeO4:0.01Bi3+, 0.001Eu3+, by changing x, facilitating conduction band tailoring. Bi4+ TL 300 LiYGezSi1-zO4:0.01Bi3+, tuning z, valence peaks near 135, 185, 232, 311 emerge LiyNa1-yYGeO4: 0.001Bi3+. Particularly, discovered Bi3+ or/and lanthanide modified exhibit superior charge carrier storage capacity minimal fading properties. For instance, ratio intensity optimized LiYGe0.75Si0.25O4:0.001Bi3+ industrial BaFBr(I):Eu2+ is as high ∼4. Interestingly, imaging intense optically driven ultraviolet-A (UVA) luminescence has validated 254 nm energized LiY0.25Lu0.75GeO4:0.01Bi3+ with 100 lux white LED illumination. Together ZnS:Mn2+, LiTaO3:Bi3+, Sm3+, Cs2ZrCl6:Sb3+ perovskites, realization wide offers promising use versatile anti-counterfeiting, information storage, delayed x-ray purposes.

Language: Английский

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ZnAl₂O₄:Er³⁺ Upconversion Nanophosphor for SPECT Imaging and Luminescence Modulation via Defect Engineering

ACS Applied Bio Materials, Journal Year: 2024, Volume and Issue: 7(4), P. 2354 - 2366

Published: March 14, 2024

This work reports an "all-in-one" theranostic upconversion luminescence (UCL) system having potential for both diagnostic and therapeutic applications. Despite considerable efforts in designing nanoparticles (UCNPs) multimodal imaging tumor therapy, there are few investigating dual modality SPECT/optical theranostics. Especially, research focusing on vivo biodistribution studies of intrinsically radiolabeled UCNPs after intravenous injection is utmost importance the clinical translation such formulations. Here, we utilized gamma emission from 169Er 171Er radionuclides demonstration ZnAl2O4:171/169Er3+ as a potent agent dual-modality imaging. No uptake radio nanoformulation was detected skeleton 4 h administration, which evidenced robust integrity ZnAl2O4:169/171Er3+. Combining therapeutics using β– particulates will be promising radio-theranostic application synthesized ZnAl2O4:169/171Er3+ nanoformulation. Cell toxicity ZnAl2O4:1%Er3+ were examined by MTT assay B16F10 mouse melanoma cell lines, demonstrated good biocompatibility. In addition, explored mechanism UCL modulation via defect engineering Bi3+ codoping ZnAl2O4:Er3+ nanophosphor. The color tuning successfully achieved red to green region function concentrations. Further, tried establish correlation with intrinsic oxygen cation vacancy defects concentrations help electron paramagnetic resonance (EPR) positron annihilation lifetime spectroscopy (PALS) studies. study contributes building bridge between nature UC that crucial design advanced

Language: Английский

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Comprehensive Review on Downconversion/Downshifting Silicate-Based Phosphors for Solar Cell Applications

ACS Omega, Journal Year: 2024, Volume and Issue: unknown

Published: April 6, 2024

Insufficient utilization of the solar spectrum in commonly employed cells, stemming from a spectral mismatch between and cell's band gap, poses barrier to enhancing cell efficiency. To overcome this challenge, downconverting silicate phosphors are cells capture infrared sunlight, thereby augmenting Downconversion/downshifting involves converting high-energy photons into one or two near-infrared (NIR) photons. Remarkably, silicate-based enhance sensitization, light scattering, antireflectivity, stability. This review delves various energy transfer mechanisms utilized phosphors. The key aspects covered encompass development that emit NIR their synthesis process. working principle its parameters discussed. impacts phosphor size, coverage, volume concentration, arrangement on performance also explored. Furthermore, study addresses several intriguing approaches for developing innovative performance.

Language: Английский

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Theoretically Guided Development of Excitation-Wavelength-Dependent Multifunctional Phosphor Based on Gallium Vacancy Perturbation

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

Published: Jan. 14, 2025

Constructing multifunctional phosphors grounded in the intricate relationship between energy level structures and luminescent properties has captivated researchers material field. Herein, using embedded cluster multiconfigurational ab initio method, levels of Bi3+ SrLaGa3O7 host at different geometries were calculated, which results establishment complete configurational coordinate curves, yielding breathing mode vibrational frequencies equilibrium bond lengths for all excited states. These curves supply deep insight into luminescence Bi3+-doped highlight impact ions second coordination sphere on luminescence. Inspired by calculated results, we designed SrLaGa3(1–x)O7−δ:0.01 with Ga3+ reductions. The artificially introduced gallium vacancy perturbed luminescence, as verified systematic experimental analysis, causes to exhibit a novel greenish-yellow emission band addition original blue band, leading excitation-wavelength-dependent multicolor phosphors. obtained phosphor displayed fluorescent anticounterfeiting function, switching system was merits direct visualization easy identification encrypted information. Additionally, white light-emitting diodes fabricated employing prepared UV chips. indicate that SrLaGa3(1-x)O7-δ:0.01 significant potential both lighting applications. Our study demonstrates necessity considering two spheres ligands when interpreting illustrates effectiveness spectral design under theoretical guidance, providing feasible path development

Language: Английский

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Highly pressure-responsive dual-mode optical manometer based on Mn2+-activated Ca2Gd8(SiO4)6O2 phosphors

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: 505, P. 159652 - 159652

Published: Jan. 16, 2025

Language: Английский

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An efficient blue–violet phosphor: an advanced material designed for high-quality full-spectrum lighting

Dalton Transactions, Journal Year: 2024, Volume and Issue: 53(10), P. 4564 - 4573

Published: Jan. 1, 2024

Under 330 nm excitation, the BSBCl: x Ce 3+ emits blue light with three distinct emission centers. WLED devices an ultra-high color rendering index were obtained using a combination of NUV chips, and commercial phosphors.

Language: Английский

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Defect regulation of a distinctive synthetic Eu2+-doped SiAlON S-phase towards controllable spectra and thermal quenching for white-light-emitting diode

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 485, P. 149796 - 149796

Published: Feb. 22, 2024

Language: Английский

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Luminescent properties of Y2LaCaGa3ZrO12: Bi3+, Al3+ cyan phosphors for application in white light emitting diodes.

Ceramics International, Journal Year: 2024, Volume and Issue: 50(17), P. 30124 - 30133

Published: May 21, 2024

Language: Английский

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Highly effective red phosphor for warm white LEDs without rare earth elements

Ceramics International, Journal Year: 2024, Volume and Issue: 50(20), P. 39528 - 39535

Published: July 22, 2024

Language: Английский

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