The Impact of Silver Codoping on Tb³⁺ Luminescence in Lithium Tetraborate Glasses

Luminescence, Journal Year: 2025, Volume and Issue: 40(1)

Published: Jan. 1, 2025

ABSTRACT Spectroscopic properties of Tb‐doped and Tb‐Ag codoped lithium tetraborate (LTB) glasses with Li 2 B 4 O 7 (or O–2B 3 ) composition are investigated analysed using electron paramagnetic resonance (EPR), optical absorption, photoluminescence (PL) excitation (PLE) spectra, PL decay kinetics absolute quantum yield (QY) measurements. spectra the show numerous narrow emission bands corresponding to 5 D → F J (J = 6–0) 5–3) transitions Tb 3+ (4 f 8 ions. The most intense band ions at 541 nm ( transition) is characterised by a lifetime slightly exceeding 2.6 ms. Ag‐containing glass two broad weakly resolved in violet‐green spectral range attributed Ag + nonplasmonic nanoclusters. Decay these nonmonoexponential, an average microsecond range. A significant enhancement intensity QY was observed LTB comparison glass. energy transfer (EET) mechanisms from nanoclusters were explored.

Language: Английский

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Sb3+/Sm3+ co-doped Cs2NaGdCl6 double perovskite: a promising candidate for the singel-component based WLED lighting with high qualtiy

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

Published: Jan. 1, 2025

Language: Английский

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Sensitive and Fast X‐Ray Scintillation with Perovskite‐Inspired Cerium Halide Nanocrystals

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

Published: Feb. 16, 2025

Abstract Real‐time, high‐precision X‐ray imaging is of critical importance in a wide range applications, from medical diagnostics to security screening. While lanthanide luminescent materials are among the most commonly used scintillators, achieving combination large‐area scalability, rapid response, and optimal performance remains challenging. Herein, perovskite‐inspired cerium halide nanocrystal scintillator presented with remarkable photoluminescence quantum yield approaching unity fast radiative recombination rate ≈29 ns. By leveraging these promising characteristics, demonstrated spatial resolution 12.21 lp mm −1 an ultra‐low detection limit 11.2 nGy s , alongside applications dynamic imaging. Based on paternal nanocrystals, versatile spectral tunability through alloying cation doping further explored, offering platform for future chemical structural design toward advanced scintillations other down‐conversion applications.

Language: Английский

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Double Perovskite Scintillators Enabled by Co‐Doped Trap Regulation for Thermally Enhanced X‐Ray Imaging

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

Published: Feb. 18, 2025

Abstract Scintillation materials play a significant role in the exploration of extreme space environments and high‐energy physics. Nevertheless, due to prevalence thermal quenching, most traditional scintillators are not capable stable X‐ray imaging at high‐temperature working mode. In this work, Ce 3+ Tb ions successfully co‐doped into Cs 2 NaGdCl 6 double perovskites (DPs) via solvothermal method, exhibiting unusual thermally enhanced scintillation performance. Specifically, radioluminescence intensity :Tb /Ce increases with temperature achieve large ratio 3.67 from 80 500 K. Interestingly, introduction brings dramatic increase thermoluminescence intensity, demonstrating that an increased number deep trap results suppression quenching. At same time, extra occurrence traps can be traced localized octahedral distortions around dopant ions. Moreover, flexible DP‐based film is fabricated by direct coating showing imaging. Ultra‐stable performance over 5 h realized under high 380 K film. The provide regulation strategy for exploring novel high‐performance temperatures.

Language: Английский

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Lead-free double perovskites with near-unity photoluminescence quantum yield for flexible anti-counterfeiting fibers and optoelectronic devices

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 161093 - 161093

Published: March 1, 2025

Language: Английский

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Advanced Probing of Eu2+/Eu3+ Photoemitter sites in BaAl2O4:Eu scintillators by Synchrotron Radiation X-ray Excited Optical Luminescence Probe

Optical Materials, Journal Year: 2025, Volume and Issue: unknown, P. 116937 - 116937

Published: March 1, 2025

Language: Английский

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Flexibly Prepared Tb³⁺‐Doped Oxyfluoride Glass Scintillators with Enhanced Luminescence for X‐Ray Imaging and Detection

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

Published: March 29, 2025

Abstract The development of eco‐friendly, flexibly preparable, and highly efficient glass scintillators is paramount importance for practical applications in fields such as medical imaging radiation detection. Herein, a series Tb 3+ ‐doped oxyfluoride successfully synthesized using the high‐temperature melt‐quenching method. glasses exhibit bright green photoluminescence with an internal quantum yield (IQE) 95.6% high optical transmittance exceeding 85% at 550 nm. Specifically, optimized LASNG: 4 mol% demonstrates superior performance, including significantly enhanced X‐ray excites luminescence (XEL) integrated intensity 209% that Bi Ge 3 O 12 (BGO) exceptional spatial resolution 30 lp∙mm −1 under irradiation‐surpassing most reported scintillators. Additionally, it also exhibits linear response to dose rates low detection limit 1.5 µGy∙s maintains excellent irradiation stability continuous exposure. This study proposes promising approach cost‐effective, high‐resolution, scalable tailored applications.

Language: Английский

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Novel rare-earth doped Cs2NaGdCl6:Sb3+ double perovskite nanocrystals toward good ability of color tuning with high quantum efficiency

The Journal of Chemical Physics, Journal Year: 2025, Volume and Issue: 162(16)

Published: April 22, 2025

All-inorganic halide double perovskites have attracted extensive attention as new luminescent materials owing to their high luminous efficiency and wide emission spectrum. In this work, blue-red bicolor Cs2NaGdCl6 (CNGC) perovskite nanocrystals doped with Sb3+/Ho3+ were prepared using a hydrothermal method. The incorporation of Sb3+ significantly enhanced the intrinsic “self-trapped excitons (STEs)” wide-band bright blue centered at 470 nm. On basis, different concentrations Ho3+ introduced achieve color tunable from red region, extremely quantum efficiencies 96.53% 92.17%, respectively. By use diverse methods, including spectroscopic analysis fluorescence lifetime, mechanism efficient luminescence related dopant was comprehensively explored. Results show that not only can enhance STEs CNGC but also has an activation effect on rare earth ion Ho3+, because it plays role bridge for two energy transfer channels between centers, details investigated. Thermal stabilities studied over temperature range 303–473 K good performances demonstrated fact PL intensities CNGC:1%Sb3+ CNGC:1%Sb3+/10%Ho3+ 423 75.1% 70.1% compared those 303 K, With CNGC:1%Sb3+/10Ho3+ used, UV light-emitting diode activated devices fabricated characterized. emissions suggest materials’ prominent potential in application plant lighting. Finally, white-light sole matrix, strategy tri-doping Tb3+ proposed based principle three primary colors. device fabrication CNGC:1%Sb3+/10%Ho3+/2.5%Tb3+ sample characterization processes prove its feasibility then provide valuable insights design Sb ion-doped lead-free toward easily which be applied various fields.

Language: Английский

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Designing Polychromatic Luminescence in Mn²⁺-Doped Cs₂NaLuCl₆ Double Perovskite Crystals via Energy Transfer Engineering for Optical Thermometry and X-ray Imaging

Inorganic Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 2, 2025

Metal halide double perovskites with splendid optical features have been considerably investigated for optoelectronic applications. Herein, a series of Mn2+-doped Cs2NaLuCl6 perovskite crystals were prepared. Via adopting the density functional theory calculation, effect Mn2+ doping on electronic structure compound was discussed. It found that crystal can emit intense blue light from host self-trapped exciton (STE) emission. Excited by 320 nm, STE and emissions simultaneously observed in resulting crystals. Owing to efficient energy transfer Mn2+, polychromatic luminescence final products. Moreover, taking advantage various responses emission intensities temperature, thermometric characteristics investigated, their maximum relative sensitivity is 0.99% K-1, which hardly impacted content. Furthermore, prepared exhibit good X-ray radioluminescence properties, low detection limitation 0.99 μGyair s-1. Additionally, utilizing designed crystal, flexible imaging high resolution 20 lp mm-1 be operated high-temperature environment realized. These results indicated are suitable thermometry imaging.

Language: Английский

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Tunable Luminescence and Temperature Sensing in Tb3+ mono-doped Mg3Gd2Ge3O12 Phosphor with High Quantum Yield

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

Published: Feb. 1, 2025

Language: Английский

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