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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Self-Trapped Exciton Emission in a Zero-Dimensional (TMA)₂SbCl₅·DMF Single Crystal and Molecular Dynamics Simulation of Structural Stability

The Journal of Physical Chemistry Letters, Journal Year: 2021, Volume and Issue: 12(30), P. 7091 - 7099

Published: July 22, 2021

Lead-free lower-dimensional organic–inorganic metal halide materials have recently triggered intense research because of their excellent photophysical properties and chemical stability. Herein, we report a novel zero-dimensional (0D) hybrid single crystal (TMA)2SbCl5·DMF (TMA = N(CH3)3, DMF= HCON(CH3)2), which exhibits typical self-trapped exciton (STE) emission with an efficient yellow at 630 nm high photoluminescence quantum yield (PLQY) 67.2%. The dual STE is attributed to the singlet triplet STEs in inorganic [SbCl5]2–, respectively. Further, ab initio molecular dynamics simulation was performed estimate stability structure room temperature. calculated excited-state indicates that deformation parameter (Δd) larger than ground state, illustrating origin large Stokes shift. These results indicate these new 0D lead-free halides are promising luminescent for optoelectronic applications.

Language: Английский

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One ion to catch them all: Targeted high-precision Boltzmann thermometry over a wide temperature range with Gd3+

Light Science & Applications, Journal Year: 2021, Volume and Issue: 10(1)

Published: Nov. 22, 2021

Abstract Ratiometric luminescence thermometry with trivalent lanthanide ions and their 4f n energy levels is an emerging technique for non-invasive remote temperature sensing high spatial temporal resolution. Conventional ratiometric often relies on thermal coupling between two closely lying governed by Boltzmann’s law. Despite its simplicity, Boltzmann excited allows precise sensing, but only within a limited range. While low temperatures slow down the nonradiative transitions required to generate measurable population in higher excitation level, that are too favour equalized populations of levels, at expense relative sensitivity. In this work, we extend concept more than provide quantitative guidelines link choice gaps multiple states performance different windows. By approach, it possible retain sensitivity precision measurement over wide range same system. We demonstrate using YAl 3 (BO ) 4 (YAB):Pr 3+ , Gd 6 P J crystal field spin-orbit split UV avoid black body background even highest temperatures. This phosphor easily excitable inexpensive powerful blue LEDs 450 nm. Zero-background realized blue-to-UV transfer upconversion Pr −Gd couple upon visible method us cover window 30 800 K.

Language: Английский

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Ultra‐Sensitive, Selective and Repeatable Fluorescence Sensor for Methanol Based on a Highly Emissive 0D Hybrid Lead‐Free Perovskite

Angewandte Chemie International Edition, Journal Year: 2022, Volume and Issue: 61(35)

Published: June 7, 2022

A convenient and rapid detection method for methanol in ethanol remains a major challenge due to their indistinguishable physical properties. Herein, novel fluorescence probe based on perovskite was successfully designed overcome this bottleneck. We report new zero-dimensional (0D) hybrid of [MP]2 Inx Sb1-x Cl7 ⋅ 6 H2 O (MP=2-methylpiperazine) displaying an unusual green light emission with near-unity photoluminescence quantum yield. Remarkably, 0D exhibits reversible methanol-response luminescence switching between yellow color but fail any other organic vapors. Even blended alcohol solutions, the luminescent excellent sensing performance multiple superiorities response time (30 s) ultra-low limit (40 ppm), etc. Therefore, can be utilized as perfect detect traces from ultrahigh sensitivity, selectivity repeatability. To best our knowledge, work represents first wide potential environmental monitoring detection,

Language: Английский

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Hybrid 0D Antimony Halides as Air‐Stable Luminophores for High‐Spatial‐Resolution Remote Thermography

Advanced Materials, Journal Year: 2021, Volume and Issue: 33(9)

Published: Jan. 22, 2021

Abstract Luminescent organic–inorganic low‐dimensional ns 2 metal halides are of rising interest as thermographic phosphors. The intrinsic nature the excitonic self‐trapping provides for reliable temperature sensing due to existence a range, typically 50–100 K wide, in which luminescence lifetimes (and quantum yields) steeply temperature‐dependent. This sensitivity range can be adjusted from cryogenic temperatures above room by structural engineering, thus enabling diverse thermometric and applications ranging protein crystallography diagnostics microelectronics. Owing stable oxidation state Sb 3+ , Sb(III)‐based far more attractive than all major non‐heavy‐metal alternatives (Sn‐, Ge‐, Bi‐based halides). In this work, relationship between characteristics crystal structure microstructure TPP SbBr 5 (TPP = tetraphenylphosphonium) is established, then its potential showcased environmentally robust phosphor remote thermography. material easily processable into thin films, highly beneficial high‐spatial‐resolution particular, compelling combination high spatial resolution (1 µ m) precision (high specific sensitivities 0.03–0.04 −1 ) demonstrated fluorescence‐lifetime imaging heated resistive pattern on flat substrate, covered with solution‐spun film .

Language: Английский

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Dual‐Band‐Tunable White‐Light Emission from Bi³⁺/Te⁴⁺ Emitters in Perovskite‐Derivative Cs₂SnCl₆ Microcrystals

Angewandte Chemie International Edition, Journal Year: 2022, Volume and Issue: 61(9)

Published: Jan. 4, 2022

Luminescent metal halides have attracted considerable attention in next-generation solid-state lighting because of their superior optical properties and easy solution processibility. Herein, we report a new class highly efficient dual-band-tunable white-light emitters based on Bi3+ /Te4+ co-doped perovskite derivative Cs2 SnCl6 microcrystals. Owing to the strong electron-phonon coupling energy transfer from Te4+ , microcrystals exhibited broad dual-band emission originating inter-configurational 3 P0,1 →1 S0 transitions with good stability high photoluminescence (PL) quantum yield up 68.3 %. Specifically, remarkable transition -PL lifetime milliseconds at 10 K microseconds 300 was observed, as solid evidence for isolated emission. These findings provide not only insights into excited-state dynamics but also general approach achieve single-composition lead-free through ns2 -metal ion co-doping.

Language: Английский

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Sequential and Reversible Phase Transformations in Zero‐Dimensional Organic‐Inorganic Hybrid Sb‐based Halides towards Multiple Emissions

Angewandte Chemie International Edition, Journal Year: 2022, Volume and Issue: 61(49)

Published: Oct. 8, 2022

Abstract Zero‐dimensional (0D) metal halides have drawn increasing attention due to the attractive structure dependent photoluminescence (PL) properties. Here, we report two new 0D organic–inorganic hybrid Sb‐based halides, (MTP) 6 SbBr Sb 2 Br 9 ⋅H O (MTP=Methyltriphenylphosphonium, crystal 1) and 5 (crystal 2), featuring a reversible structural phase transformation tunable orange red emissions upon dehydration rehydration of H molecules. Intriguingly, subsequent heat treatment further enables formation glassy state (glass 3) with near‐infrared luminescence, moreover, sequential reverse from glass 3 1 is triggered by acetonitrile water vapor stepwise. The anti‐counterfeiting demo based on PL switching finally achieved thus engineering in expands their multiple applications optical fields.

Language: Английский

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Ultralow‐loss Optical Waveguides through Balancing Deep‐Blue TADF and Orange Room Temperature Phosphorescence in Hybrid Antimony Halide Microstructures

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(39)

Published: Aug. 14, 2023

Harnessing the potential of thermally activated delayed fluorescence (TADF) and room temperature phosphorescence (RTP) is crucial for developing light-emitting diodes (LEDs), lasers, sensors, many others. However, effective strategies in this domain are still relatively scarce. This study presents a new approach to achieving highly efficient deep-blue TADF (with PLQY 25 %) low-energy orange RTP 90 through fabrication lead-free hybrid halides. class monomeric dimeric 0D antimony halides can be facilely synthesized using bottom-up solution process, requiring only few seconds minutes, which offer exceptional stability nontoxicity. By leveraging adaptable molecular arrangement crystal packing modes, demonstrate ability self-assemble into regular 1D microrod 2D microplate morphologies. self-assembly facilitated by multiple non-covalent interactions between inorganic cores organic shells. Notably, these microstructures exhibit outstanding polarized luminescence function as low-dimensional optical waveguides with remarkably low optical-loss coefficients. Therefore, work not pioneering demonstration halides, but also introduces micro/nanostructures that hold promising applications white LEDs photonic systems.

Language: Английский

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Regulating Exciton De‐Trapping of Te⁴⁺‐Doped Zero‐Dimensional Scandium‐Halide Perovskite for Fluorescence Thermometry with Record High Time‐Resolved Thermal Sensitivity

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(44)

Published: Aug. 21, 2023

Abstract Fluorescence thermometry has been propelled to the forefront of scientific attention due its high spatial resolution and remote non‐invasive detection. However, recent generations thermometers still suffer from limited thermal sensitivity ( S r ) below 10% change per Kelvin. Herein, this work presents an ideal temperature‐responsive fluorescence material through Te 4+ ‐doped 0D Cs 2 ScCl 5 ·H O, in which isolated polyhedrons endow highly localized electronic structures, strong electron–phonon coupling facilitates formation self‐trapped excitons (STEs). With rising temperature, dramatic asymmetric expansion soft lattice induces increased defects, exciton–phonon coupling, low activation energy, evokes a rapid de‐trapping process STEs, enabling several orders magnitude changes lifetime over narrow temperature range. After regulating with different doping, record‐high (27.36% K −1 lifetime‐based detection is achieved at 325 K. The robust stability against multiple heating/cooling cycles long‐term measurements enables uncertainty 0.067 Further, developed are demonstrated for local monitoring operating on internal components. It believed that constitutes solid step towards building next generation ultrasensitive based low‐dimensional metal halides.

Language: Английский

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Reversible Triple-Mode Photo- and Radioluminescence and Nonlinear Optical Switching in Highly Efficient 0D Hybrid Cuprous Halides

Chemistry of Materials, Journal Year: 2023, Volume and Issue: 35(17), P. 6598 - 6611

Published: Aug. 17, 2023

Multifunctional stimuli-responsive luminescent and optical switching is extremely crucial for wide advanced photonic applications, but it remains a challenging objective halide perovskites. Herein, by performing single-crystal to (SC–SC) transformation as dynamic molecular strategy, we realized reversible triple-mode photoluminescence, radioluminescence (PL RL), nonlinear (NLO) in pair of zero-dimensional (0D) hybrid cuprous halides [ETPP]2Cu4Br6 [ETPP]CuBr2. Specifically, [ETPP]CuBr2 display highly efficient yellow green light emissions under UV excitation with the highest quantum yield up near unity. Simultaneously, identical can also be activated using X-ray RL 57,974 photons MeV–1, surpassing most previously reported halides. Most remarkably, SC–SC between them an ethanol impregnation-heating process, which provides PL/RL transitions two light-emitting states. Additionally, this process accompanied transition centrosymmetric NLO-inactive noncentrosymmetric NLO-active through second harmonic generation (SHG) "silent-active" switching. To best our knowledge, first PL, RL, SHG perovskite chemistry, realize applications data storage, information security, logic gates, etc.

Language: Английский

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