Spotlight on Luminescence Thermometry: Basics, Challenges, and Cutting‐Edge Applications

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(36)

Published: July 21, 2023

Abstract Luminescence (nano)thermometry is a remote sensing technique that relies on the temperature dependency of luminescence features (e.g., bandshape, peak energy or intensity, and excited state lifetimes risetimes) phosphor to measure temperature. This provides precise thermal readouts with superior spatial resolution in short acquisition times. Although thermometry just starting become more mature subject, it exhibits enormous potential several areas, e.g., optoelectronics, photonics, micro‐ nanofluidics, nanomedicine. work reviews latest trends field, including establishment comprehensive theoretical background standardized practices. The reliability, repeatability, reproducibility are also discussed, along use multiparametric analysis artificial‐intelligence algorithms enhance readouts. In addition, examples provided underscore challenges faces, alongside need for continuous search design new materials, experimental techniques, procedures improve competitiveness, accessibility, popularity technology

Language: Английский

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Eu³⁺ Single-Doped Phosphor with Antithermal Quenching Behavior and Multicolor-Tunable Properties for Luminescence Thermometry

Inorganic Chemistry, Journal Year: 2023, Volume and Issue: 62(2), P. 893 - 903

Published: Jan. 4, 2023

To date, non-contact luminescence thermometry methods based on fluorescence intensity ratio (FIR) technology have been studied extensively. However, designing phosphors with high relative sensitivity (Sr) has become a research hotspot. In this work, Eu3+ single-doped Ca2Sb2O7:Eu3+ Sr value for dual-emitting-center are developed and proposed. The anti-thermal quenching behavior of originating from the energy transfer (ET) host → is found proved in designed phosphors. Interestingly, adjustable color emission blue to orange can be achieved. Surprisingly, degree gradually reduces 240 127% as doping content increases 0.005 0.05 mol, attributed most being located low symmetrical [Ca1O8] dodecahedral site. According differentiable responses temperature, maximal reaches 3.369% K-1 (383 K). Moreover, ambient temperature intuitively predicted by observing emitting color. Owing excellent performance optical thermometry, color-tunable properties, outstanding acid alkali resistance polydimethylsiloxane (PDMS) films, expected prospective candidates thermometers LED devices various conditions.

Language: Английский

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Spinel-type persistent luminescence nanoparticles: From mechanisms, compositions to applications

Coordination Chemistry Reviews, Journal Year: 2023, Volume and Issue: 488, P. 215171 - 215171

Published: April 29, 2023

Language: Английский

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High-sensitivity NaYF₄:Yb³⁺/Ho³⁺/Tm³⁺ phosphors for optical temperature sensing based on thermally coupled and non-thermally coupled energy levels

Nanoscale, Journal Year: 2023, Volume and Issue: 15(26), P. 11179 - 11189

Published: Jan. 1, 2023

Non-contact optical temperature sensors are highly sought after by researchers due to their satisfactory resolution (δ(T) < 0.1 °C), high relative thermal sensitivity (Sr > 1% °C-1), fast temporal response (t s), and long-term stability. In this study, NaYF4:Yb3+/Ho3+/Tm3+ upconversion nanoparticles were prepared a solvothermal method, crystal structure, microscopic morphology, luminescence mechanism, together with the sensing properties of specimens, investigated. Under 980 nm laser excitation, specimens exhibited strong luminescence, emission peaks corresponded characteristic energy level jumps Ho3+ Tm3+, respectively. The temperature-dependent spectra samples investigated based on fluorescence intensity ratio (FIR) technique over gradient 295-495 K. thermally coupled levels (TCLs: 1G4(1,2) → 3H6(Tm3+)) non-thermally (NTCLs: 3F3 3H6(Tm3+) 5F3 5I8(Ho3+), 1G4 3H6(Tm3+), 5F5 5F4 5I8(Ho3+)) for performance. maximum absolute (Sa), (Sr), minimum δ(T) found be 0.0126 K-1 (495 K), 1.7966% (345 0.0167 K, respectively, which better than those most materials, simultaneous action multiple coupling can further improve precision. This study indicates that sample has good value measurement also provides new ideas exploration other high-quality materials.

Language: Английский

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Novel GdAlGe2O7:Bi3+,Eu3+ phosphors with anti-thermal quenching properties for high sensitivity optical temperature measurement

Materials Today Physics, Journal Year: 2024, Volume and Issue: 43, P. 101391 - 101391

Published: March 6, 2024

Language: Английский

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Dy3+,Mn4+ co-doped phosphors for synergistic luminescent dual-mode thermometer and high-resolution imaging

Materials & Design, Journal Year: 2024, Volume and Issue: 241, P. 112906 - 112906

Published: April 1, 2024

Fluorescent temperature measurement has become a research hotspot due to its characteristics of non-contact, miniaturization, and fast response. However, it remains key challenge realize excellent sensitivity high resolution. Herein, series La2MgTiO6:Dy3+,Mn4+ phosphors are developed the related energy transfer between Dy3+→Mn4+ is discovered. The coupling distance Mn4+ adjacent ligands greatly affected by temperature. differences emission levels lower Dy3+ hinder multi-phonon relaxation process, which moderates thermal quenching rate Dy3+. Therefore, highly sensitive FIR thermometers built according significant discrimination dependence Mn4+. maximum Sa Sr reach 0.022 K−1(@563 K) 2.622 %K−1(@544 K). In contrast, thermometer based on lifetime fabricated, extremely Interestingly, can effectively promote Mn4+, then improve sensitivity. enhanced from 1.621 %K−1(@503 2.305 %K−1 (@480 resolution dual-mode fluorescence thermometry have exceeded most current optical materials. Besides, thermochromic properties presented designed be combined with PDMS films qualitatively evaluate ambient

Language: Английский

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Mn5+-activated Ca6Ba(PO4)4O near-infrared phosphor and its application in luminescence thermometry

Light Science & Applications, Journal Year: 2022, Volume and Issue: 11(1)

Published: Sept. 22, 2022

The near-infrared luminescence of Ca6Ba(PO4)4O:Mn5+ is demonstrated and explained. When excited into the broad strong absorption band that spans 500-1000 nm spectral range, this phosphor provides an ultranarrow (FWHM = 5 nm) emission centered at 1140 originates from a spin-forbidden 1E → 3A2 transition with 37.5% internal quantum efficiency excited-state lifetime about 350 μs. We derived crystal field Racah parameters calculated appropriate Tanabe-Sugano diagram for phosphor. found quenches due to thermally-assisted cross-over 3T2 state relatively high Debye temperature 783 K Ca6Ba(PO4)4O facilitates efficient emission. Since also yellow Eu2+ dopant, we explained its electronic structure, partial total density states, effective Mulliken charges all ions, elastic constants, temperature, vibrational spectra. Finally, application in intensity ratio thermometry obtained relative sensitivity 1.92%K-1 resolution 0.2 range physiological temperatures.

Language: Английский

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High sensitivity and multicolor tunable optical thermometry in Bi3+/Eu3+ co-doped Ca2Sb2O7 phosphors

Materials Today Chemistry, Journal Year: 2022, Volume and Issue: 27, P. 101264 - 101264

Published: Dec. 2, 2022

Language: Английский

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Temperature invariant ratiometric luminescence manometer based on Cr3+ ions emission

Chemical Engineering Journal, Journal Year: 2022, Volume and Issue: 453, P. 139632 - 139632

Published: Oct. 8, 2022

• A new ratiometric pressure readout approach is proposed. highly sensitive manometer described. Cr 3+ concentration modifies the crystal field strength. LMTO:Cr allows for temperature invariant readout. The dependence of spectroscopic properties phosphor on applied enables development luminescent manomenters that allow remote and imaging pressure. Although most widely used manometers years have been those using pressure-induced spectral shift emission band, their main limitations are relatively low sensitivity spectrally narrow lines or precision broadband phosphors. Taking advantage benefits both these approaches, this paper proposes a pressure-readout strategy exploits 4 T 2 → band ions in Li Mg 3 TiO 6 . developed way characterized by linear LIR range 0-7.75 GPa relative S R =4.7%/GPa. Importantly, insensitivity to changes 123-563K. This novel will group manometers.

Language: Английский

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Thermal Stability Improvement of Cr³⁺‐Activated Broadband Near‐Infrared Phosphors via State Population Optimization

Advanced Optical Materials, Journal Year: 2023, Volume and Issue: 11(14)

Published: April 25, 2023

Abstract Technological progress has accelerated the researches into broadband near‐infrared (NIR) luminescent materials as next‐generation intelligent NIR light sources; however, poor thermal stability restricts applications of phosphors. Herein, new insights Cr 3+ ‐activated phosphors with improved are provided. The photoluminescence intensity originating from 4T2→4A2 emission CaLu 2 Al 4 SiO 12 :Cr (CLAS:Cr) optimal electron occupation ( T / E) increases up to 118% at 475 K compared that room temperature, which is best for phosphor. Accordingly, ideas design thermally stable proposed by optimizing population between and E states migration state. Finally, multifunctional CLAS:Cr in fluorescence ratio thermometry, X‐ray detection, phosphor‐converted light‐emitting diodes, bio‐imaging demonstrated.

Language: Английский

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