Novel Li2Ga0.5Sb0.5O3(Li4GaSbO6):Mn4+ phosphors with multisite occupancy for efficient FIR and luminescence lifetime dual-mode thermometers

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

Published: Jan. 1, 2025

Language: Английский

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The Important Round-Trip Energy Transfer for Excitation of the Red Emission in the Er³⁺/Yb³⁺ System

The Journal of Physical Chemistry Letters, Journal Year: 2025, Volume and Issue: unknown, P. 1336 - 1342

Published: Jan. 28, 2025

Round-trip energy transfer (RTET) in the popular Er3+/Yb3+ upconversion (UC) system is a newly discovered mechanism for red emission of Er3+ through Yb3+ as an intermediate ion. However, importance RTET still remains question. Here, we show cubic Y2O3 that new defeats conventional ones and dominates both UC down-shifting (DS) luminescence wide concentration range Yb3+. The enables to exhibit similar time evolution green ≤10%, its contribution DS exceeds 90% ≥10%. As unique feature, temporal profile entire process presented first time. Our findings provide physical insight into regulation color behavior Yb3+/Er3+ system.

Language: Английский

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Proton Conductive Metal‐Organic Framework Encapsulating Emissive Hexacyanidochromate(III) Ions for Ratiometric and Lifetime‐Based Detection of Humidity and Temperature

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

Published: Feb. 27, 2025

Abstract Luminescent metal‐organic frameworks (MOFs) are widely exploited as sensors due to their versatility and sensitivity external stimuli. Although there numerous luminescent MOF‐based thermometers or humidity sensors, only a few examples allow efficient detection of both these parameters. We present family MOF‐materials based on Sr 2+ Ba ions, 4,4′‐bipyridine‐ N , ’‐dioxide (4,4′‐bpdo) linkers, [M III (CN) 6 ] 3− species, described by the formulas {[Sr II 2.5 (NO 3 )][Sr (H 2 O)]}[M ]∙ n (solvent) (M = Cr ( 1 ), Co )) {[Ba (4,4′‑bpdo) 1.5 O) (NO) ][Ba (MeOH)][M ]}∙ 4 )). Among them, air‐stable phase 1a deserves main recognition reversible water vapor sorption properties, proton conductivity, dual photoluminescence (PL). This cationic MOF is constructed blue‐emissive 4,4′‐bpdo linkers while encapsulated hexacyanidochromate ions exhibit near‐infrared PL ≈800 nm. great platform for sensing relative (RH) temperature utilizing ratiometric approach intensities NIR‐emission lifetime. The optical thermometry high performance can be separated from influence RH using fully dehydrated phase, 1deh stable at 0% RH. Given that, obtained encapsulating purely inorganic molecular rubies unique example multifunctional proton‐conductive sensor temperature.

Language: Английский

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Precise Temperature Sensing and Optical Information Storage via Dual-Emission Gallate Phosphors

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

Published: March 21, 2025

Luminescent temperature sensing has become a research hotspot in the past few years. Nevertheless, improving sensitivity and resolution remains key challenge. Herein, Bi3+,Sm3+-codoped CaYGaO4 phosphors with precise performance excellent photochromic characteristics were developed. The energy difference between Sm3+ levels hinders multiphoton relaxation (MPR) process, giving rise to insensitivity. By virtue of drastically different dependence Bi3+ ions, an accurate fluorescence intensity ratio (FIR) thermometer is fabricated. emission used as reference signal, while adopted probe signal. maximum absolute (Sa) relative (Sr) CaYGaO4:Bi3+,Sm3+ are 0.0018 K–1 (@563 K) 0.56% (@544 K), respectively. Moreover, exhibits superior characteristics, rapidly changing its color from white brown 25 s under 254 nm light irradiation, outstanding cycling stability. Overall, provide potential multifunctional applications anticounterfeiting optical information storage fields.

Language: Английский

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Phase Evolution and Thermally Enhanced Red-NIR Upconversion Luminescence in ZrO2:Yb3+/Tm3+

Optical Materials, Journal Year: 2025, Volume and Issue: unknown, P. 116967 - 116967

Published: March 1, 2025

Language: Английский

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Upconversion emission and temperature sensing properties of the LiBaPO4: Er3+, Yb3+ phosphor

Optical Materials, Journal Year: 2025, Volume and Issue: unknown, P. 116700 - 116700

Published: Jan. 1, 2025

Language: Английский

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Up-conversion luminescence and temperature sensing performance of YVO4:Yb3+/Er3+ phosphors with high thermal stability

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

Published: Feb. 1, 2025

Language: Английский

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Excellent Upconversion Luminescence Obtained by Er³⁺ Self-Sensitization for Temperature Sensing in Deep Tissues and Anticounterfeiting Application

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

Published: April 2, 2025

The development of high-efficiency upconversion (UC) luminescent materials with multifunctional applications, particularly those excited by wavelengths within the second near-infrared (NIR) biological window, holds a paramount scientific significance. Herein, Er3+ self-sensitization UC performance 1532 nm wavelength is first studied in CaSc2O4 matrix. Strong green and red emission as well 4I11/2 → 4I15/2 NIR transition are observed, though multipath optical thermometry high sensitivity realized. Moreover, penetration depth tissues can reach at least 6 mm, benefiting from its ideal excitation located window. Beyond that, CaSc2O4: phosphor displays variable color luminescence under dual-wavelength excitation, including 980 nm, which be used for enhancing security anticounterfeiting materials. Our findings suggest that excellent properties promising candidate application field.

Language: Английский

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Thermal Enhanced Near-Infrared Upconversion Luminescence in Y₂Mo₄O₁₅:Yb/Nd with Uniaxial Negative Thermal Expansion

Inorganic Chemistry, Journal Year: 2024, Volume and Issue: 64(1), P. 295 - 304

Published: Dec. 24, 2024

Thermal quenching (TQ) of luminescence presents a significant barrier to the effective use optical thermometers in high-temperature applications. Herein, we report novel uniaxial negative thermal expansion (NTE) phosphor, Y2–2x–2yMo4O15:xYb,yNd, synthesized by solid-state reaction. Under 980 nm laser excitation, it exhibits excellent thermally enhanced near-infrared (NIR) upconversion (UCL) performance. The UCL intensities Nd3+ at 573 K were 396-fold (750 nm), 57.6-fold (810 and 7.6-fold (882 respectively, compared with that room temperature. In situ temperature-dependent X-ray diffraction steady- transient-state spectra are used reveal behavior mechanism detail. enhancement NIR is attributed synergistic effect increased radiative transition probability due anisotropic crystal energy transfer (ET) efficiency resulting from shrinkage phonon-assisted process. Based on intensity ratio (LIR) coupled levels (4F7/2/4F3/2), target sample achieved ultrahigh sensitivity (Sr = 3.0% K–1 298 K) high repeatability over entire temperature range. This study not only provides fresh perspective for achieving phosphors using materials but also approach developing outstanding

Language: Английский

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Temperature-dependent upconversion luminescence of YVO4:Yb3+/Er3+/Ho3+ phosphors for multimodal optical anti-counterfeiting and temperature sensing applications

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

Published: Dec. 1, 2024

Language: Английский

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