Thermochromic Pr3+ doped CaMoO4 phosphor with diverse thermal responses for temperature sensing

Tian, Xiuying; Xu, Shufen; Wen, Jin; Zhu, Ling; Ji, Changyan; Huang, Zhi; Wang, Xiaofang; Luo, Fei; Liu, Xin; Lu, Yuhou; Li, Jing; Li, Chunyan; Peng, Yangxi; Cao, Jianhui; He, Zhiyuan

doi:10.1016/j.ceramint.2023.05.257

Cited by 18 publications

(4 citation statements)

References 37 publications

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“…Both monitoring results under the two excitation wavelengths demonstrate high sensitivity (Table S3†). 52–56 In addition, because of the dual compensation phenomenon of the phosphor being for the presence of red light, resulting in a shift of the International Commission on Illumination (CIE) chromaticity coordinates (Fig. 7c and S10†), especially the chromaticity under 270 nm excitation, which changes significantly from blue–purple to orange–red, its potential as a high-temperature safety indicator material is proposed.…”

Section: Resultsmentioning

confidence: 99%

Design of anti-thermal quenching Pr³⁺-doped niobate phosphors based on a charge transfer and intervalence charge transfer band excitation-driven strategy

Yang

Guo

et al. 2023

Inorg. Chem. Front.

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Section: Resultsmentioning

confidence: 99%

Design of anti-thermal quenching Pr³⁺-doped niobate phosphors based on a charge transfer and intervalence charge transfer band excitation-driven strategy

Yang

Guo

et al. 2023

Inorg. Chem. Front.

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“…The parameters of fluorescence intensity, fluorescence intensity ratio (FIR), decay time, emission wavelength, bandwidth, and luminescence color that change with temperature can be used to build optical thermometers [1,2] . Among them, FIR-based thermometers have excellent accuracy and strong anti-interference capabilities, making them promising for use in high-temperature extremes [3,4] . It is common knowledge that phosphors usually show signs of thermal quenching in response to temperature increases [5] .…”

Section: Introductionmentioning

confidence: 99%

Charge compensation improves energy transfer to realize anti-thermal-quenching and improve the CaMoO4: Sm3+ phosphors optical temperature measurement sensitivity base on the FIR model

Zhu,

Wu,

et al. 2024

Preprint

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Luminescent materials are the main focus of non-contact thermometers due to their high detection sensitivity, non-invasiveness, quick reaction, exceptional stability. It is still difficult to design high sensitivity optical temperature sensors using FIR technology. This article increases FIR value and obtains high sensitivity temperature sensitive phosphors by utilizing the anti-thermal-quenching effect of rare earth luminous centers. Sm3+ and alkali metal co-doped CaMoO4 phosphors have been prepared by high-temperature solid-state method. Rietveld XRD refinement results showed that the co-doping of Sm3+ and K+ can significantly improve the energy transfer from the host to Sm3+ and significantly increase the luminous intensity of Sm3+. We found that co-doping of Sm3+ and K+ not only effectively enhanced the luminescence intensity, but also regulated the lifetime of this phosphors. As the Sm3+ and K+ co-doping concentration 0.02, respectively, the τ value decreases from 4.12 to 3.54 ms, which proves to be effective in luminous of LED. The optical temperature measurement of CaMoO4: 0.001Sm3+, 0.001K+ was studied using FIR technology. The maximum SaMAX and SrMAX values are 0.27 K-1 at 483 K and 2.25% K-1 at 363 K, respectively. Moreover, the CaMoO4: 0.02Sm3+, 0.02K+ also has a certain absorption capacity in visible optical drive, which proved by UV-Vis DRS. The electronic density of states of phosphors are drawn via first-principles to understand the effect of Sm3+ and alkali metals co-doped on luminescence. The above results demonstrate that the Sm3+ and K+ co-doping CaMoO4 might be an attractive material for the application of temperature measurement and light-emitting diode.

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“…It turned out that the material we proposed, apart from being an excellent material for improving the quality of WLED lighting, can also be successfully used as a highly sensitive optical thermometer, which results directly from the high symmetry. The current state of the research on molybdate phosphors for temperature sensors is not extensive and mainly concerns alkaline earth molybdates [17][18][19]. However, there is no information about double-perovskites, so this work is very valuable and provides new information regarding non-contact thermometry.…”

Section: Introductionmentioning

confidence: 99%

Highly Sensitive Temperature Sensors Resulting from the Luminescent Behavior of Sm3+-Doped Ba2MgMoO6 High-Symmetry Double-Perovskite Molybdate Phosphors

Miniajluk-Gaweł,

Bondzior,

Ptak

et al. 2024

Materials

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We present double-perovskite molybdate with the formula of Ba2MgMoO6 doped with Sm3+ ions as a potential red phosphor to improve the color characteristics of white-light-emitting dioded (wLEDs). The new orange–red phosphor was synthesized using the co-precipitation (CP) method, and then its structural and spectroscopic properties were determined. Red emission at 642.6 nm dominates, which results from the electric dipole (ED) transition of the 4G5/2 → 6H9/2 type, and the materials are characterized by short luminescence decay times. BMM:Sm3+ is, to our best knowledge, the clearest example of dominant red emission of Sm3+ resulting from the location of the dopant in octahedral sites of high-symmetry cubic structure. In the sample containing 0.1% Sm3+, Sm3+ ions are located in both Mg2+ and Ba2+ sites, while at higher concentrations the Ba2+ site is less preferable for doping, as a result of which the emission becomes more uniform and single-site. The relative sensitivity calculated from FIR has a maximum of 2.7% K−1 at −30 °C and another local maximum of 1.6% K−1 at 75 °C. Such value is, to the best of our knowledge, one of the highest achieved for luminescent thermometry performed using only Sm3+ ions. To sum up, the obtained materials are good candidates as red phosphor to improve the color characteristics of wLEDs, obtaining a color-rendering index (CRI) of 91 and coordinated color temperature (CCT) of 2943 K, constituting a warm white emission. In addition to this, a promising precedent for temperature sensing using high-symmetry perovskite materials is the high sensitivity achieved, which results from the high symmetry of the BMM host.

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Thermochromic Pr3+ doped CaMoO4 phosphor with diverse thermal responses for temperature sensing

Cited by 18 publications

References 37 publications

Design of anti-thermal quenching Pr³⁺-doped niobate phosphors based on a charge transfer and intervalence charge transfer band excitation-driven strategy

Design of anti-thermal quenching Pr³⁺-doped niobate phosphors based on a charge transfer and intervalence charge transfer band excitation-driven strategy

Charge compensation improves energy transfer to realize anti-thermal-quenching and improve the CaMoO4: Sm3+ phosphors optical temperature measurement sensitivity base on the FIR model

Highly Sensitive Temperature Sensors Resulting from the Luminescent Behavior of Sm3+-Doped Ba2MgMoO6 High-Symmetry Double-Perovskite Molybdate Phosphors

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Thermochromic Pr3+ doped CaMoO4 phosphor with diverse thermal responses for temperature sensing

Cited by 18 publications

References 37 publications

Design of anti-thermal quenching Pr3+-doped niobate phosphors based on a charge transfer and intervalence charge transfer band excitation-driven strategy

Design of anti-thermal quenching Pr3+-doped niobate phosphors based on a charge transfer and intervalence charge transfer band excitation-driven strategy

Charge compensation improves energy transfer to realize anti-thermal-quenching and improve the CaMoO4: Sm3+ phosphors optical temperature measurement sensitivity base on the FIR model

Highly Sensitive Temperature Sensors Resulting from the Luminescent Behavior of Sm3+-Doped Ba2MgMoO6 High-Symmetry Double-Perovskite Molybdate Phosphors

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Design of anti-thermal quenching Pr³⁺-doped niobate phosphors based on a charge transfer and intervalence charge transfer band excitation-driven strategy

Design of anti-thermal quenching Pr³⁺-doped niobate phosphors based on a charge transfer and intervalence charge transfer band excitation-driven strategy