Sensitivity Enhancement of Thermometry in Tb3+-Doped KY(CO3)2:Sm3+ by Energy Transfer

Molecules, Journal Year: 2025, Volume and Issue: 30(4), P. 767 - 767

Published: Feb. 7, 2025

Sm3+ and Tb3+ co-doped KY(CO3)2 temperature sensing materials were prepared via the hydrothermal method. X-ray diffraction results confirmed monoclinic phase in KY(CO3)2:Sm3+,Tb3+ samples. In this host, transfers energy to through cross-relaxation. Notably, a 20 mol% concentration of increases emission intensity by 7.1 times. The fluorescence intensities 5D4 (Tb3+) 4G5/2 (Sm3+) vary significantly with temperature. Both Sm3+-Sm3+ Tb3+-Sm3+ pairs act as effective centers for optical measurement. relationship between ratio (I542/I567) reveals that maximum absolute sensitivity relative are 0.031 K-1 0.46%K-1 at room 298 K, respectively. contrast, KY(CO3)2:Sm3+ has only 0.00051 0.11%K-1 498 K. These highlight significant role enhancing intensities, making doped promising candidate thermometry.

Language: Английский

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Unlocking advanced thermometric capabilities: BiVO₄: Er³⁺/Yb³⁺ nanophosphors with dual-mode up-conversion and down-shifting features

RSC Advances, Journal Year: 2025, Volume and Issue: 15(1), P. 655 - 664

Published: Jan. 1, 2025

Luminescent materials doped with rare-earth (RE) ions have emerged as powerful tools in thermometry, offering high sensitivity and accuracy.

Language: Английский

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A multi-functional phosphor Ba5La3MgAl3O15:Pr3+ with diverse thermal responses for high sensitive temperature sensing, photothermochromism indicator and patterned anti-counterfeiting

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

Published: Feb. 1, 2025

Language: Английский

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CRYSTAL CHEMICAL DESIGN OF ACTIVATED EUROPIUM(III) PHOSPHORS WITH SCHEELITE STRUCTURE

Ukrainian Chemistry Journal, Journal Year: 2025, Volume and Issue: 90(12), P. 45 - 56

Published: Jan. 31, 2025

For the first time, relationship between features of crystal structure and luminescent properties a series molybdates, vanadates, mixed vanadate-molybdates with scheelite has been systemati­cally analyzed. Using solid-state reaction method, CaMoO₄, KBi(MoO₄)₂, BiVO₄, as well solid solutions K₀.₄₅Bi₀.₅₅Mo₀.₉V₀.₁O₄, Ca₀.₁Bi₀.₉Mo₀.₁V₀.₉O₄, Bi₀.₉₈V₀.₉Mo₀.₁O₄ do­ped 0.1 mol% Eu³+, have synthesized. The degree distortion coordination environment molybdate, vanadate, vanadate-molybdatetetrahedrain investigated structures was calculated based on X-ray diffraction data using Shape 2.0 software via continuous shape measure method. Analysis luminescence spectra reveals that transition from molybdates to vanadates leads noticeable red shift 5D₀→⁷F₂ bands in longer-wave length region spectrum. substituted members family, following common spectral characteristics europium(III)-doped frameworks can be identified: 1)the all studied scheelite-structured matrices is characterized by predominant emission 610–620 nm region, corresponding electronic transition; 2) centersis significantly more distorted than expected for tetragonal phase scheelite, even under monoclinic distortion. It demonstrated aliovalent substitution anionic cationic sublattices one key approaches modifying not only local frame work but also factor fluencing oxide phosphors. Particular importance attributed changes sphere ion second sphere, which includes tetrahedral anions (Mo/V)O₄. This regularity serveas basis controlled tuning line intensity ratios (color coordinates) forenhancing efficiency

Language: Английский

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Samarium doping effects on molybdate phosphor with high color rendering index and its application

Ceramics International, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 1, 2024

Language: Английский

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