JOURNAL OF LUMINESCENCE
·
2021
·
IF 3.599
Chenwei Xu,Chenxia Li,Degang Deng,Hua Yu,Le Wang,Changyu Shen,Xufeng Jing,Shiqing Xu
A series of new double perovskite structure CaLaMgTaO 6 : Bi 3+ , Eu 3+ phosphors were synthesized by high-temperature solid-phase method. The crystal structure, luminescence characteristics and temperature sensing performance have been systematically studied. The substitution rule of Bi 3+ in CLMT and its luminescence characteristics are described. The decay curve of Bi 3+ further proves the existence of an energy transfer from Bi 3+ to Eu 3+ . They have different thermal quenching behaviors, and their fluorescence intensity ratio (FIR) parameter has tremendous temperature sensing performance. Under 329 nm ultraviolet excitation, the emission peaks at 408 nm and 614 nm are used as the reference signal, the largest absolute sensitivity is 0.0127 K −1 at 573 K, and the maximum relative sensitivity is 1.33%K −1 at 483 K. This indicates that CaLaMgTaO 6 : Bi 3+ , Eu 3+ is a material with excellent temperature measurement performance and applicability in non-contact optical thermometers.
研究领域:
材料科学
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发光材料
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光学传感
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无机化学
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功能材料
✓ 已验证
DOI
高影响因子
Laser & Photonics Reviews
·
2023
·Vol. 18
·期 1
·2300717
·
IF 11
Yuzhen Wang,Gaochao Liu,Zhiguo Xia
Near-infrared (NIR) II region (1000–1700 nm) lighting sources possess special potential for temperature sensing and quantitative composition analysis. However, it is a challenge to tune the luminescence toward such long wavelength NIR-II emission. Herein, Cr 4+ ions occupation is designed and verified in olivine-type CaYGaO 4 as [CrO 4 ] tetrahedron by site occupancy confinement. Under 620 nm red light excitation, the phosphors display broadband NIR-II emission centered at 1330 nm with a full width at half maximum (FWHM) of 233 nm, resulting from spin-allowed 3 T 2 to 3 A 2 transition of Cr 4+ ions in T d symmetry. The optical thermometry application is demonstrated by decoding the spectral shift and decay times varying with temperature, and the maximum relative sensitivities are 5.82% and 0.78% K −1 , respectively. Furthermore, a flexible film containing CaYGaO 4 :Cr 4+ is fabricated to implement the non-invasive detections of fillet temperature and NH 3 concentration in ammonia. This work represents a step toward developing next-generation NIR-II luminescence materials and widens non-invasive detection applications.
研究领域:
材料科学
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光学工程
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生物医学工程
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无创检测技术
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分子成像
✓ 已验证
DOI
高影响因子
JOURNAL OF LUMINESCENCE
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2021
·
IF 3.599
Yanting Zhu,Chenxia Li,Degang Deng,Hua Yu,Hao Li,Le Wang,Changyu Shen,Xufeng Jing,Shiqing Xu
A series of Eu 2+ /Cr 3+ co-doped BaAl 12 O 19 phosphor was synthesized by traditional high temperature solid stated method, and the temperature-sensitive characteristic of the phosphor was researched. Due to the temperature sensitivity of the fluorescence lifetime of Cr 3+ , the thermometry based on fluorescence lifetime can be realized. Furthermore, the emissions of Eu 2+ ion and Cr 3+ ion can be well separated, which shows the excellent signal recognition ability of this phosphor. The Eu 2+ /Cr 3+ co-doped BaAl 12 O 19 phosphor can be used for the thermometry based on fluorescence intensity ratio. A dual-mode optical thermometry is proposed and researched in the temperature range of 293–563 K by using the decay lifetime of Cr 3+ emission and in the temperature range of 295–476 K by using the fluorescence intensity ratio of Eu 2+ to Cr 3+ as temperature readout. The maximum values of relative sensitivity are 0.466% K −1 at 363 K and 0.259% K −1 at 476 K. The Eu 2+ /Cr 3+ co-doped BaAl 12 O 19 phosphor has excellent optical temperature characteristic , and its dual-mode thermometry characteristics provide convenience for the application of this material. This phosphor has potential application prospects in the field of optical thermometry.
研究领域:
材料科学
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光学工程
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无机化学
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传感器技术
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功能材料
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Xibao Zhang,Yonghui Xu,Xiudi Wu,Shuwen Yin,Chuansheng Zhong,Chenxue Wang,Liang Zhou,Hongpeng You
A series of novel Bi 3+ /Ln 3+ -activated Ca 2 ScSbO 6 (CSSO) phosphors were synthesized by solid-state method and their luminescent behaviors were investigated in detail. Under the 302 nm excitation, the CSSO:Bi 3+ shows remarkable near-ultraviolet photoluminescence with a peak emission at 365 nm. Eu 3+ -activated CSSO phosphor possesses high efficiency and no obvious reduction of emission intensity even after replacing Sc with Eu completely, which indicates a low-concentration quenching effect. In addition, its emission intensity at 423 K (I 423K ) still maintains 88 % compared with that of at room temperature (I 298K ), indicating good thermostability. In contrast, the CSSO:Bi 3+ phosphor exhibits a significant reduction in emission intensity, maintaining only 49 % of its luminescence at 423 K (I 423K /I 298K ). By codoping Bi 3+ and Ln 3+ (Ln = Eu, Tb, Dy, Sm), the energy transfer was observed from the Bi 3+ to Ln 3+ ions, endowing the CSSO:Bi 3+ , Ln 3+ phosphors with tunable multicolor emissions. Leveraging the differing thermostabilities of the emission spectra for Bi 3+ and Ln 3+ ions, we designed and assessed a range of sensitive optical thermometers. Among these, the CSSO:Bi 3+ , Eu 3+ phosphors exhibited the best performance, boasting maximum absolute and relative sensitivities of 9.96 % K −1 and 2.002 % K −1 , respectively. Additionally, we displayed the multi-mode anti-counterfeiting function of synthesized phosphors, and a multi-color switching system was designed with the advantages of direct visualization and easy identification of encrypted information. These results indicate that Bi 3+ and Ln 3+ coactivated CSSO phosphor has the potential application for non-contact temperature measurement and anti-counterfeiting.
研究领域:
材料科学
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光学工程
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无机化学
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功能材料
·
传感器技术
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
·Vol. 50
·期 6
·9753-9761
·
IF 5.2
Li Li,Haoliang Yang,Yongjie Wang,Faling Ling,Xianju Zhou,Guotao Xiang,Zhongmin Cao,Sha Jiang,Zhiyu Yang,Yongbin Hua
Novel Ca 2 ScNbO 6 (CSNO): Cr 3+ phosphors were synthesized through a solid-phase method. The crystal structures, luminescence performances, and applications were introduced in this work. The optimized doping concentration was found with a Cr 3+ concentration of 0.01 mol. Under the 336 nm excitation, the recorded photoluminescence spectrum in the range of 650–1300 nm indicated that the obtained sample can emit a broad near-infrared emission with a dominant peak of 858 nm while the full width at half maximum (FWHM) was determined to be 191 nm. To gain a deeper comprehension of the luminescent properties, the crystal field strength was investigated as Dq/B = 2.03, and the electron-phonon coupling for parameter S was calculated to be about 2.01. As for the potential application, utilizing the variable temperature decay lifetime technique, the relative sensitivity (S R ) was approximately 1.16% K −1 at 387 K, which can be promised for utilization in optical temperature measurement. On the other hand, a near-infrared phosphor-converted lighting-emitting diode ( Pc -LED) was fabricated for night vision. Eventually, the security ink based on the obtained sample was made for use in the anti-counterfeiting field.
研究领域:
材料科学
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光学工程
·
无机化学
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功能材料
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生物医学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2022
·
IF 4.171
Yunkang Bu,Yu Chen,Xingyue Chen,Yichun Zhang,Degang Deng,Yuyu Shen,Liuyan Zhou,Chenwei Xu
Up conversion luminescent materials Sr 2 YTaO 6 : Er 3+ , Yb 3+ phosphors were prepared by high temperature calcination . In view of the formation, temperature characteristics , and photoluminescence features of the sample, X-ray diffraction and photoluminescence were used. Under the excitation at 980 nm, the series of samples is significantly stimulated by Er 3+ up-conversion luminescence and Yb 3+ sensitization at 524, 550 and 659 nm. According to the diversity of temperature sensing performance from these three highest peaks, a dual-mode temperature sensor on account of fluorescence intensity ratio (thermally coupled level between 2 H 11/2 and 4 S 3/2 , and nonthermally coupled energy levels between 2 H 11/2 and 4 F 9/2 ) is achieved by using a single luminescent center. Moreover, the phosphor has strong thermal stability, which is helpful to improve the accuracy of temperature measurement. Under the temperature measurement of a dual-mode temperature sensor, it is calculated that the optimal absolute sensitivity S a of thermally coupled energy level is 0.78 × 10 −3 K −1 (473 K) and relative sensitivity S r is 1.32 %K −1 (293 K), and the maximum optimal absolute sensitivity S a of non-thermally coupled energy level is 1.02 × 10 −4 K −1 (473 K) and relative sensitivity S r is 0.58 %K −1 (293 K). All results imply that Sr 2 YTaO 6 : Er 3+ , Yb 3+ phosphors are promising materials for self-referenced optical temperature measurement.
研究领域:
材料科学
·
光学工程
·
无机化学
·
功能材料
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生物医学传感
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·Vol. 49
·期 5
·7913-7919
·
IF 5.532
Rui Li,Panlai Li,Guohui Wei,Jiehong Li,Yawei Shi,Ye Wang,Shaoxuan He,Yuanbo Yang,Wenge Ding,Zhijun Wang
Developing novel optical thermometry with ultrahigh relative sensitivity and temperature resolution has become a cutting-edge topic. For this purpose, under obeying Boltzmann distribution , a series of Li 2 Zn 0.9992-x A x Ge 3-y B y O 8 :0.08% Cr 3+ (B= Sc 3+ , In 3+ , A = Si 4+ ) phosphors were studied, which the luminescence intensity ratio between the transition of 4 T 2g → 4 A 2g emission and the R line based on thermally coupled energy levels constitutes a temperature sensing work with a relative sensitivity of 9.46% K −1 , 9.73% K −1 , and 10.38% K −1 , respectively. It is worth mentioning that the luminescence intensity of the R line (peak 1) increases significantly with the increase of temperature, while the transition of 4 T 2g → 4 A 2g (peak 2) with high intensity at low temperature gradually quenching, and this opposite trend is an important advantage for the design of excellent thermometers. Compared the best relative sensitivity of Li 2 Zn 0.9992-x A x Ge 3-y B y O 8 :0.08%Cr 3+ (B= Sc 3+ , In 3+ , A = Si 4+ ) with the crystal field Dq /B, it can be concluded that relative sensitivity increasing gradually with decreasing the intensity of crystal field. Finally, by testing the stability of the sample at 50 K, a thermal resolution of 0.082 K, 0.080 K and 0.077 K was obtained, respectively, which is one of the best thermal resolutions so far, while the repeatability of the sample stability at 50 K and 300 K cycles was higher than 99%. Our work is expected to provide guiding insights for optimizing the sensitivity of Cr 3+ -based luminescence intensity ratio thermometers.
研究领域:
材料科学
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光学传感
·
固体物理
·
低温物理学
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功能材料
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发光材料
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Guixian Li,Gan Li,Qinan Mao,Lang Pei,Hua Yu,Meijiao Liu,Liang Chu,Jiasong Zhong
Mn 4+ -activated phosphors are of great interest in luminescence lifetime thermometry due to the luxuriant luminescence properties influenced by the locally surrounding crystal field. It is highly desirable to develop effective Mn 4+ -based luminescence lifetime thermometry through modulating the structural parameters. In this work, by introducing the smaller Mg 2+ ions to replace Ca 2+ site in the BaLaCaSbO 6 matrix, a 4.2-fold enhance in the luminescence intensity, red-shifted from 690 nm to 698 nm, as well as luminescence lifetime increase from 0.212 to 0.951 ms is achieved. These modulations are mainly attributed to the strengthen pressure on the local structure, superior lattice rigidity and suppresses non-radiative transition after the substitution of smaller Mg 2+ . Interestingly, owing to the obvious thermal quenching behavior of Mn 4+ ions in the matrix, effective lifetime-based luminescence thermometry can be realized. Mg 2+ dopant results in the improvement of the absolute sensitivity from 1.22 µsK −1 (BaLaCaSbO 6 :Mn 4+ @408 K) to 4.88 µsK −1 (BaLaCa 0.1 Mg 0.9 SbO 6 :Mn 4+ @401 K).
研究领域:
材料科学
·
发光材料
·
光学测温
·
固态化学
·
光子学
✓ 已验证
DOI
高影响因子
Materials Today Chemistry
·
2023
·
IF 7.3
Zhihao Zhang,Huimin Li,Ran Pang,Wenjing Wang,Da Li,Lihong Jiang,Su Zhang,Hongjie Zhang
Afterglow materials exhibit distinct temperature-dependent luminescence compared to general optical materials due to the presence of extra unique energy transfer paths from traps to luminescent centers. These paths include: 1) energy transfer through the conduction band (CB), and 2) energy transfer via quantum tunneling channels to various energy levels. These have a notable impact on both the overall intensity and the relative intensity of emission at different temperatures, which is often unintentionally overlooked. To investigate the influence of these additional paths on temperature-dependent luminescence, we employed a simple yet effective method of varying the excitation light intensity in Y 2 CaSnGa 4 O 12 :Pr 3+ , an afterglow material. And the influences on optical thermometer and anti-thermal quenching performance were illustrated comprehensively. We ultimately arrived at some interesting and widespread conclusions: 1) The performance of fluorescence intensity ratio (FIR) thermometry, which relies on excitation intensity, can be stabilized by avoiding the presence of charging traps. The high sensitivity of the afterglow intensity ratio (AIR)-based thermometry, which does not require an external light source , may be closely associated with the quantum tunneling process. 2) The performance of trap-assisted anti-thermal quenching is excitation intensity-dependent. We elucidated the specific contribution of traps that had previously been unaccounted for in earlier reports.
研究领域:
发光材料
·
光学测温
·
固体物理
·
光子学
·
材料科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）