Splendid four-mode optical thermometry design based on thermochromic Cs₃GdGe₃O₉:Er³⁺ phosphors

Journal of Materials Chemistry C, Journal Year: 2022, Volume and Issue: 10(25), P. 9492 - 9498

Published: Jan. 1, 2022

Four-mode optical thermometry techniques involving FIR from TCEL and NTECL, FL the thermochromic effect of Cs 3 GdGe O 9 :0.9Er 3+ were realized.

Language: Английский

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A four-mode high-sensitive optical thermometer based on Ca3LiZnV3O12:Sm3+ phosphors

Materials Today Chemistry, Journal Year: 2023, Volume and Issue: 29, P. 101409 - 101409

Published: Feb. 20, 2023

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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Recent progress on optical properties of double perovskite phosphors

Progress in Solid State Chemistry, Journal Year: 2023, Volume and Issue: 69, P. 100391 - 100391

Published: Jan. 20, 2023

Language: Английский

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Rare‐Earth‐Based Lead‐Free Halide Double Perovskites for Light Emission: Recent Advances and Applications

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(44)

Published: May 22, 2024

Abstract The double perovskite material of Cs 2 NaRECl 6 ‐type, utilizing rare‐earth (RE) ions as trivalent element, has attracted widespread interest due to its unique optoelectronic properties and wide range applications. It displays rich optical properties, including visible infrared light emission through down‐shifting, well up‐conversion radiation‐induced emission. These exceptional make it a promising for devices such detectors, light‐emitting diodes, lasers energy storage batteries but also show advantages in anti‐counterfeiting technology imaging. In this article, the latest progress is reported challenges crystal structure, preparation, performance, various applications lead‐free halide (HLDPs) compounds. This outline prospective research directions existing materials, with aim facilitating discovery new HLDPs materials.

Language: Английский

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Erbium‐Induced Boost in Self‐Trapped Exciton Emission of Double Perovskites for Highly Sensitive Multimodal and Multiplexed Optical Thermography

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: April 16, 2024

Abstract Self‐trapped excitons (STEs) of lead‐free perovskites have aroused tremendous interest in remote optical thermometry due to strong exciton–phonon coupling and large Stokes shifts. Herein, a bright multimodal multiplexed thermometer is constructed with high sensitivity ( S r ) self‐calibrating ability based on Cs 2 NaInCl 6 :Er 3+ double perovskite, allowing for fast simplified reading via mobile devices. Intriguingly, Er doping not only shows the characteristic green emissions but also introduces nanoelectronic domains through new localized valance band maximum breaks symmetry In site, which facilitates generation more STEs. The temperature‐sensitive blue emission STEs temperature‐insensitive endow including time‐resolved ratiometric readout schemes 3.8% K −1 , where an upconversion primary serves as reference calibrate other modes. Meanwhile, designed thermometers show robust photostability, repeatability, structural stability long‐time working storage. addition, remarkable thermochromic phenomenon from enables quick color‐multiplexed thermography smartphone, utilized capture real‐time 2D thermal imaging microelectronic This work demonstrates great potential perovskite low‐cost portable thermometry.

Language: Английский

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High-efficiency dual-mode luminescence of metal halide perovskite Cs3Bi2Cl9:Er3+ and its use in optical temperature measurement with high sensitivity

Journal of Alloys and Compounds, Journal Year: 2023, Volume and Issue: 944, P. 169134 - 169134

Published: Feb. 4, 2023

Language: Английский

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Pure Green Upconversion from a Multicolor Downshifting Perovskite Crystal

Advanced Optical Materials, Journal Year: 2023, Volume and Issue: 11(10)

Published: March 9, 2023

Abstract Lanthanide‐doped halide perovskite has emerged as a promising phosphor for multimode luminescence. Here, chloride‐based single crystal is reported, namely Cs 2 NaInCl 6 :Yb 3+ ,Er , that grown in hydrothermal reactor. The as‐grown crystals feature two distinct luminescence behaviors under UV and 980 nm laser excitation, respectively. Under lamp the shows multicolor emission of sharp bands at 448, 550, 660 nm, covering wide color gamut CIE diagram. In stark contrast, excitation exhibits pure green upconversion with green‐to‐red ratio up to 211. universal dominance further demonstrated many chlorides, including AgInCl NaBiCl AgBiCl . strong used optical thermometry, which demonstrates an unprecedented sensitivity 9.3% K −1 low temperature end. work introduces kind new hosts single‐band luminescence, opening possibilities areas such low‐threshold pure‐green converter.

Language: Английский

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Three-mode fluorescence thermometers based on double perovskite Ba2GdNbO6:Eu3+,Mn4+ phosphors

Ceramics International, Journal Year: 2023, Volume and Issue: 49(23), P. 38007 - 38014

Published: Sept. 14, 2023

Language: Английский

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Understanding and Effective Tuning of Red‐to‐Green Upconversion Emission in Ho‐Based Halide Double Perovskite Microcrystals

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 34(4)

Published: Oct. 19, 2023

Abstract Ho‐based lead‐free double perovskite microcrystals (MCs), Cs 2 NaHo 1‐x Yb x Cl 6 , are synthesized and demonstrated to be promising optical temperature sensing materials by understanding the concentration‐dependent upconversion (UC) luminescence mechanisms. By optimizing dopant concentration, a dominant emission shifting from red green is successfully achieved in an activator‐rich system. During this process, intensity ratio (R/G) can changed 12.5 (pure light) 0.14 light). It clarified that cross‐relaxation (CR) process between activator energy transfer 3+ Ho key mechanisms of UC R/G variation. Moreover, shows strong dependence on temperature, resulting competition CR levels. The high‐sensitivity thermometer obtained 0.99 0.01 MCs with bright luminescence, whose fluorescence gains maximum relative sensitivities reaching 0.68% K −1 at 400 K. multicolor quantitative modeling mentioned here crucial for concentration‐dependence characteristics optimize design thermometer. This study extension application range materials.

Language: Английский

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