ANALYTICAL CHEMISTRY
·
2023
·
IF 7.4
Jiaxi Hu,Cheng Chen,Xiaobin Xie,Lichun Zhang,Hongjie Song,Yi Lv
With the intensification of explosive-based terrorism attack and environmental concerns, the innovation of high-efficiency and portable sensors for facile, rapid, and reliable monitoring of explosives has become one of the major demands in societies. Herein, a reliable and easy-to-use cataluminescence sensor system based on Dy3+ doping La2O3 nanorod catalysts has been developed for the identification and detection of six types of military explosive vapors, including homologous compounds and even isomers. The efficient discrimination is to make full use of the thermodynamic and kinetic information that can be extracted from the catalytic oxidation process of explosive molecules on various sensing materials, that is, the response signal and response time to generate the fingerprint of each target compound, while the rapid detection of the strategy can be manifested in response toward six military explosive vapors within 2.5 s and recover within 4 s. Meanwhile, the quantitative analysis of the explosives by the sensor system was realized based on 0.8%Dy:La2O3 with optimal catalytic activity, and the detection limits of NB, m-MNT, m-DNB, PNT, DNT, and TNT can reach 0.62, 0.49, 0.63, 0.38, 0.023, and 0.067 μg mL–1. In this research, we also constructed a novel sensor device and detection platform for explosive monitoring, which is of great significance for providing a new sensing principle for the efficient identification of explosives.
研究领域:
材料科学
·
化学传感
·
军事技术
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DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Xin Zhang,Ruirui Cui,Min Zhang,Chaoyong Deng
The development of white light emitting diodes (WLEDs) prepared with tricolor phosphors is limited by issues such as reabsorption, difficulty in controlling sample proportions, low thermal stability, etc . This study synthesized a series of single-host Ca 2 GdNbO 6 : x Dy 3+ (CGNO: x Dy 3+ ) phosphors using High-temperature Solid-state Reaction. Then the structure characteristics, luminescence, thermal stability, and morphology were analyzed in detail. The results showed that all the samples, emitted white light superposed by the blue at 483 nm and the yellow light at 575 nm under near-ultraviolet excitation, exhibit good quantum yield, excellent optical properties, and good moisture resistance. Besides, the CIE chromaticity coordinates (CIE) and luminous pictures of CGNO: x Dy 3+ phosphors both at 352 nm and 389 nm were investigated. Then, the properties of LED devices obtained by coating the aforementioned phosphors on 365 nm and 395 nm chips were characterized. The research confirmed that CGNO: x Dy 3+ are potential single-host white light phosphors in the field of lighting.
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DOI
高影响因子
Materials Horizons
·
2023
·Vol. 10
·期 12
·5684-5693
·
IF 13.3
Panqin Wang,Jiaren Du,Tengyue Wang,Shaoxing Lyu,Rik Van Deun,Dirk Poelman,Hengwei Lin
Despite the substantial progress made, the responsiveness of thermo-responsive materials upon various thermal fields is still restricted to monochromatic visualization with single-wavelength light emission. This stems from a poor understanding of the photophysical processes within the materials and the unvarying optical performance of luminescent centers’ response to various ambient temperatures. Conventional techniques to assess the inhomogeneities of thermal fields can be time-consuming, require specialized equipment and suffer from inaccuracy due to the inevitable interference from background signals, especially at high temperature. To this end, we overcome these limitations for the first time, to flexibly visualize temperature inhomogeneities by developing a thermochromic smart material, SrGa12−xAlxO19:Dy3+. Two distinct modes of thermochromic properties (steady-state temperature-dependent luminescence and thermally stimulated luminescence) are investigated. It is revealed that the abundant colors (from yellow, green to red) and amazing color-changing features are due to the superior optical integration of the host (SrGa12−xAlxO19) and dopant (Dy3+) emissions under specific thermal stimulations. We suggest that this thermo-responsive smart material can be used to realize highly efficient and simple visualization of invisible thermal distribution in industry and beyond.
研究领域:
材料科学
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光学工程
·
热物理学
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功能材料
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工业检测
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DOI
高影响因子
Scientific Reports
·
2017
·Vol. 7
·期 1
·1-11
·
IF 4.259
Wang Jing,Bu Yanyan,Wang Xiangfu,Seo Hyo Jin
Optical thermometry based on the up-conversion intensity ratio of thermally coupled levels of rare earth ions has been widely studied to achieve an inaccessible temperature measurement in submicron scale. In this work, a novel optical temperature sensing strategy based on the energy transfer from charge transfer bands of W-O and Eu-O to Eu 3+ -Dy 3+ ions is proposed. A series of Eu 3+ /Dy 3+ co-doped SrWO 4 is synthesized by the conventional high-temperature solid-state method. It is found that the emission spectra, emission intensity ratio of Dy 3+ (572 nm) and Eu 3+ (615 nm), fluorescence color, lifetime decay curves of Dy 3+ (572 nm) and Eu 3+ (615 nm), and relative and absolute sensitivities of Eu 3+ /Dy 3+ co-doped SrWO 4 are temperature dependent under the 266 nm excitation in the temperature range from 11 K to 529 K. The emission intensity ratio of Dy 3+ (572 nm) and Eu 3+ (615 nm) ions exhibits exponentially relation to the temperature due to the different energy transfer from the charge transfer bands of W-O and Eu-O to Dy 3+ and Eu 3+ ions. In this host, the maximum relative sensitivity S r can be reached at 1.71% K −1 , being higher than those previously reported material. It opens a new route to obtain optical thermometry with high sensitivity through using down-conversion fluorescence under ultraviolet excitation.
研究领域:
材料科学
·
光学
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DOI
PubMed
高影响因子
Materials Today Communications
·
2025
·
IF 4.5
Yutong Sun,Qun Zeng,Yanghong Cheng,Zezhong Li
A series of Tm 3+ /Dy 3+ /Eu 3+ single and co-doped LiNbO 3 color tunable phosphors were synthesized via the solid-state reaction. The phase structure, microscopic topography, optical characteristics, decay lifetimes, energy transfer processes，and thermal stability were comprehensively characterized through combined X-ray diffraction analysis, scanning electron microscope, and advanced spectroscopic methodologies. Following further in-depth analysis, the optimal concentration of dopant ions was determined, and the energy transfer effect between activators in the LiNbO 3 matrix was confirmed. The CIE demonstrated that adjusting the doping concentration of rare earth ions makes it possible to achieve polychromatic tunable light, as well as cool and warm white light. Crucially, Li 0.95 NbO 3 :0.01Tm 3+ /0.02Dy 3+ /0.02Eu 3+ phosphor exhibited remarkable thermal stability, maintaining 97.1 % of its initial strength at temperatures of 423 K. Additionally, WLEDs that have been coated with the aforementioned phosphor on a 365 nm NUV chip emit bright white light, exhibiting a color rendering index of 81.3 and correlated color temperature of 5426 K. It is powerfully suggested that the LiNbO 3 :Tm 3+ /Dy 3+ /Eu 3+ phosphors has the potential to become a new choice for WLED application.
研究领域:
材料科学
·
光学
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Peiyuan Zhuang,Wei Liu,Haohao Cao,Yunan Lin,Yan Guo,Jinghui Zhang,Yanjie Zhang
A series of K 2 Y(WO 4 )(PO 4 ): Dy 3+ , Eu 3+ phosphors have been successfully developed via solid-state reaction method to generate color-tunable warm white light. Based on the phase identification and microstructure analysis, Dy 3+ ions singly-doped and co-doped phosphors all exhibit single phase of K 2 Y(WO 4 )(PO 4 ) crystal, demonstrating the substitution of Y 3+ ions by Dy 3+ ions in host lattice. Under near ultraviolet (NUV) excitation of 350 nm, Dy 3+ singly-doped K 2 Y(WO 4 )(PO 4 ) phosphors emit a cold-white light with correlated color temperature of 9266 K comprised by blue emission peak at 486 nm and yellow emission peak at 578 nm, which are attributed to 4 F 9/2 → 6 H 15/2 and 4 F 9/2 → 6 H 13/2 electronic transitions of Dy 3+ ions, respectively. Further, Eu 3+ and Dy 3+ ions are co-doped K 2 Y(WO 4 )(PO 4 ) host and Eu 3+ ions can be acted as red emission centers to achieve tunable photoluminescence properties in a single-phased phosphor excited by NUV chip with wavelength of 394 nm. It is proved by the photoluminescence spectra of Eu 3+ and Dy 3+ ions co-doped samples that there exist the energy transfer between Dy 3+ ions and Eu 3+ ions in the KYWP host, which belongs to the electric dipole-electric dipole interaction. Finally, CIE color coordinates of the generating white light by K 2 Y(WO 4 )(PO 4 ): Dy 3+ , Eu 3+ phosphors can be facilely adjusted from (0.3601, 0.3427) to (0.5161, 0.3547) with the increasing Eu 3+ ions concentration. The warm white light with tunable color temperatures of 4409 K, 3042 K, 2566 K and 1976 K can be achieved for K 2 Y(WO 4 )(PO 4 ): Dy 3+ , Eu 3+ phosphors, indicating a potential application in NUV white light emitting diodes.
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DOI
高影响因子
Materials Science and Engineering B-Advanced Functional Solid-State Materials
·
2016
·
IF 2.331
B.Y. Huang,B.L. Feng,L. Luo,C.L. Han,Y.T. He,Z.R. Qiu
Novel Sr 3 Y(PO 4 ) 3 :Dy 3+ , Eu 3+ (SYP:Dy 3+ , Eu 3+ ) phosphors were synthesized by a standard solid-state reaction under an ambient air atmosphere and their structural and optical properties were investigated. XRD and diffuse reflectance spectra (DRS) were used to explore structural properties. The former showed that single phase phosphors were obtained and that the rare earth ions entered into the cubic host by substituting the smaller Y 3+ ions and thereby enlarging the unit cell. The DRS indicated that the host has a direct bandgap of 4.5 eV. Under 393 nm excitation, a strong and stable warm white light emission with high color purity was achieved in SY 0.92 P:0.06Dy 3+ , 0.04Eu 3+ . The energy transfer from Dy 3+ to Eu 3+ ions was investigated and the related mechanism was discussed based on the optical spectra and emission decay curves. The thermal quenching of emission is similar to that of YAG:0.06Ce 3+ . The results show the single phase phosphor is potential in warm white LED.
研究领域:
材料科学
·
光学材料
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光子学
·
固态化学
·
LED技术
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DOI
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2025
·Vol. 54
·期 6
·4882-4890
·
IF 2.5
Fu Yingtao,Chen Zhaoyang,Sun Yifan,Liu Yi,Fan Yanwei,Wang Junhua,Chen Huiming
In order to develop glass-ceramic materials capable of emitting neutral white light and to address the limitations of single rare earth element ion-doped luminescent materials, a glass-ceramic material containing Dy 3+ /Eu 3+ -co-doped NaCaPO 4 nanocrystals was successfully synthesized using the melt-quenching and two-step crystallization methods. The prepared glass-ceramic materials were characterized by X-ray diffraction, transmission electron microscopy, and photoluminescence spectroscopy. The energy transfer process between Dy 3+ and Eu 3+ ions was confirmed through excitation spectra, emission spectra, and luminescence decay curves. The emission coordinates and correlated color temperatures of samples with different doping concentrations were calculated using the standard CIE 1931 colorimetric system. The results showed that coordinated emission was achieved in the glass-ceramic containing NaCaPO 4 nanocrystals under excitation at 363 nm. Furthermore, by adjusting the concentration ratio of Dy 3+ and Eu 3+ ions, the color temperature of the white light emission could be tuned from 9910 K to 5349 K, enabling modification of the emission color from the cool-white region to the pure-white region, with chromaticity coordinates reaching (0.3350, 0.3040). Additionally, the material exhibited high thermal stability, with an activation energy of 0.18649 eV. It is expected that the Dy 3+ /Eu 3+ -co-doped NaCaPO 4 glass-ceramic studied here has broad prospects for applications in white light-emitting diodes.
研究领域:
材料科学
·
光子学
·
光学材料
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稀土掺杂
·
固态照明
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产品关联
DOI
高影响因子
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
·
2020
·Vol. 96
·期 3
·753-762
·
IF 2.008
Zhu Rui,Bi Zun,Jia Ke,Liu Yunfei,Lyu Yinong
A series of single-component ScF 3 :Dy 3+ , Eu 3+ , Ce 3+ phosphors prepared by means of microwave hydrothermal method were explored for light-emitting diodes. The as-prepared samples were characterized via X-ray diffraction (XRD), scanning electron microscope (SEM), and photoluminescence (PL) spectroscopy. In order to rationalize the experimental results, first-principle calculations based on density functional theory had been carried out to discover electronic structures. PL performance of the RE 3+ -doped phosphors exhibited well-defined bands in the visible region. By adjusting the ratios of Ce/Dy/Eu, the color of the as-prepared phosphors can vary from blue (0.24, 0.23) to red (0.51, 0.30) across the white (0.34, 0.26) region according to the chromaticity coordinates. The results suggested that the Dy/Eu/Ce-doped ScF 3 might act as down-convert phosphors for near ultraviolet light-emitting diodes, especially for white LEDs. What is more, it can also promote a deep comperhension of the relationship between structure and properties in ScF 3 -based phosphors.
ScF 3 :RE 3+ phosphors with alterable bandgaps can emit light from blue to orange–red across white under the excitation of near ultraviolet light. Introduction of rare earth ions induced the variation of energy band structures in ScF 3 -based phosphors because of the existence of f , p , and d orbits in RE 3+ , therein f and p orbits of RE 3+ made the band structure downwards, the p hybridizing with Sc-3 d promoted the band toward high-energy region.
研究领域:
材料科学
·
光学
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DOI
高影响因子
Crystals
·
2022
·Vol. 12
·期 7
·963
·
IF 2.67
Weili Wang,Shihai Miao,Dongxun Chen,Yanjie Liang
Trivalent lanthanides (Ln3+) doped bismuth-based inorganic compounds have attracted considerable interest as promising candidates for next-generation inorganic luminescent materials. Here, a series of K0.3Bi0.7F2.4(KBF) nanocrystalline particles with controlled morphology have been synthesized through a low-temperature aqueous-phase precipitation method. Using KBF as the host matrix, Eu3+, Tb3+, Pr3+, Nd3+, Sm3+,and Dy3+ions are introduced to obtain K0.3Bi0.7F2.4:Ln3+(KBF:Ln) nanophosphors. The as-prepared KBF:Ln nanophosphors exhibit commendable photoluminescence properties, in which multicolor emissions in a single host lattice can be obtained by doping different Ln3+ions when excited by ultraviolet light. Moreover, the morphology and photoluminescence performance of these nanophosphors remain unchanged under different soaking times in water, showing good stability in a humid environment. The proposed simple and rapid synthesis route, low-cost and nontoxic bismuth-based host matrix, and tunable luminescent colors will lead the way to access these KBF:Ln nanophosphors for appealing applications such as white LEDs and optical thermometry.
研究领域:
材料科学
·
纳米技术
·
光学
·
化学
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DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2022
·
IF 4.171
Wanli Li,Zhaoyang Chen,Bo Zhang,Pengjun Zhao,Yanwei Fan
Highly thermally stable BaZn 2 (PO 4 ) 2 : Dy 3+ /Eu 3+ glass-ceramic (GC) phosphors were synthesized using a high-temperature solid-state reaction and controlled-temperature pre-crystallization method. It is found that Dy 3+ -doped BaZn 2 (PO 4 ) 2 GC phosphors produce cold white light emission at 484 nm and 575 nm under 350 nm excitation with the optimal Dy 3+ doping concentration of 0.25 mol%. The theoretical analysis indicates that the dipole-dipole interaction might be the origin of the concentration quenching mechanism of phosphor. The Eu 3+ -doped BaZn 2 (PO 4 ) 2 GC phosphors produce orange-red emission at 592, 616, 654 and 700 nm under 395 nm excitation. More than that, tunable white light emission can be achieved by optimize the co-doped concentration of Eu 3+ on BaZn 2 (PO 4 ) 2 : 0.25Dy 3+ GC phosphor. The emission spectral intensity and luminescence decay curves from BaZn 2 (PO 4 ) 2 : 0.25Dy 3+ /yEu 3+ (range of y) GC phosphors show the energy transfer from Dy 3+ to Eu 3+ and the emission color can be tuned from cool white to warm white region with the color correlated temperatures (CCTs) reduction from 7299 K to 2520 K. The typical BaZn 2 (PO 4 ) 2 : 0.25Dy 3+ /1Eu 3+ GC phosphors have a high thermal stability with an activation energy of 0.30641 eV. Finally, the white LED devices were fabricated by coupling a 363 nm UV light-emitting diode chip with the BaZn 2 (PO 4 ) 2 : 0.25Dy 3+ /yEu 3+ GC phosphors. These results suggest that BaZn 2 (PO 4 ) 2 : Dy 3+ /Eu 3+ GC phosphors may be suitable candidates for single-component white light-emitting phosphors for application in UV-WLEDs.
研究领域:
材料科学
·
光学材料
·
光子学
·
固态化学
·
发光材料
✓ 已验证
DOI
高影响因子
OPTICAL MATERIALS
·
2024
·
IF 3.8
Changwen Wang,Lixin Peng,Feng Qin,Meng Kou,Yongda Wang,Lingling Xu,Zhiguo Zhang
The understanding of how radiative transition probabilities change with temperature is crucial for comprehending the relationship between fluorescence behavior and temperature. However, although various models have been proposed to explain the patterns of transition probabilities ( A ) with temperature changes, they lack consistency due to their derivation from distinct microscopic perspectives. In this study, the macroscopic law of the temperature-dependent A for the 4 G 5/2 , 4 F 9/2 , and 5 D 0 energy states in YVO 4 :Re 3+ (Re 3+ =Sm 3+ , Dy 3+ and Eu 3+ ) was obtained. Three rare earth ions (Re 3+ ) were identified for each with unique energy level properties conducive to validating the general rules of A . These ions share a common characteristic: in the visible spectrum , their main emissions originate from the radiative transitions from the same higher energy level ( 4 G 5/2 in Sm 3+ , 4 F 9/2 in Dy 3+ , and 5 D 0 in Eu 3+ ) to lower energy levels, respectively. The A of the main emission levels, varying with T , were obtained by fitting the fluorescence decay curves. The exponential law governing non-radiative transitions was revealed after separating the radiative transition rate ( W R ) from A . The macroscopic law of temperature-dependent transition probabilities of 4 G 5/2 , 4 F 9/2 , and 5 D 0 energy states in YVO 4 :Ln 3+ (Ln 3+ = Sm 3+ , Dy 3+ and Eu 3+ ) has been found to follow the Boltzmann distribution . The results indicate that the non-radiative transitions of the main emission levels of the rare-earth ions are processes from the excited state to adjacent lower energy levels. This macroscopic pattern may serve as a foundational rule for understanding the impact of microscopic factors on A .
研究领域:
光学
·
材料科学
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DOI
高影响因子
危险品化学品经营许可证（带存储）