MATERIALS CHEMISTRY AND PHYSICS
·
2024
·
IF 4.3
Zheng Li,Yuling Su,Yuying Zuo,Gaoshang Gong,Yaran Duan,Minghao Wang,Maocai Wei,Yongqiang Wang
In this paper, the crystal structure, vacancies, magnetoelectric properties and magneto-thermal properties of Gd 1- x Dy x CrO 3 (0 ≤ x ≤ 0.5) samples were reported. In crystal structure analysis, after doping Dy 3+ , the lattice constant and the grain size of the sample decreases. The results of positron annihilation lifetime study indicates that the overall electron density near defect increases and that appeared as a gradual decreasing trend of τ 2 with Dy 3+ concentration. The ferromagnetism of the sample gradually decreased after doping, and the T N (Cr) of the sample decreased systematically with increasing concentration of Dy 3+ . Moreover, the introduction of Dy 3+ inhibited the magneto-electric coupling and weakened the magneto-thermal properties of the samples. This result reveals the effect of Dy 3+ doping on the structure, magnetic properties, magnetothermal and dielectric properties of GdCrO 3 .
研究领域:
材料科学
·
物理学
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DOI
高影响因子
JOURNAL OF FLUORESCENCE
·
2025
·
IF 3.1
Chen Dongxun,Lv Xulong,Liang Yanjie
In this work, Dy 3+ -doped Bi 2 SiO 5 nanoparticles with uniform spherical morphology and narrow size distribution have been successfully synthesized using a facile template-assisted approach. The effects of sintering temperature and Dy 3+ doping concentration on the phase composition, morphology, and luminescence properties of Bi 2 SiO 5 :Dy 3+ nanophosphor are systematically investigated through X-ray diffraction, scanning electron microscopy, and photoluminescence (PL) spectroscopy. X-ray diffraction results confirm that the synthesized Bi 2 SiO 5 :Dy 3+ nanospheres exhibit a pure tetragonal phase. Meanwhile, the phosphor particles are composed of monodisperse nanospheres with an average diameter of approximately 265 nm. Upon excitation at 388 nm, intense photoluminescence is noted in the blue ( 4 F 9/2 → 6 H 15/2 ) and yellow ( 4 F 9/2 → 6 H 13/2 ) spectral regions due to the characteristic emissions of Dy 3+ ions. Temperature-dependent PL spectra reveal that the optimized Bi 2 SiO 5 :2.5%Dy 3+ nanospheres maintain extraordinary luminescence thermal stability, retaining 81.0% of its emission intensity at 423 K compared to 303 K. The phosphor also showed remarkable color stability, with CIE chromaticity coordinates shifting minimally from (0.377, 0.413) at 303 K to (0.373, 0.407) at 423 K. This newly developed Bi 2 SiO 5 :Dy 3+ nanospheres exhibit commendable PL properties, enabling them as promising candidates for yellow phosphors in LEDs and display applications.
研究领域:
材料科学
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光学
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DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Ying Zhang,Jie Li,Chenqing Liao,Yang Xiao,Bing Lu,Shuai Wang,Yingli Liu,PengJie Zhang
According to this study, Co 2 Z ferrite is suitable for applications in high-frequency antennas. Ba 3 Co 2 Fe 24-x Dy x O 41 samples with different values of Dy 3+ doping concentration (x) in the range of 0.00–0.25 were prepared in the study by employing solid-state sintering and 2.5 wt% Bi 2 O 3 sintering aids. A systematic analysis of the physical phase structure, microstructure, and magnetic dielectric properties of the samples was also performed. The X-ray diffraction patterns of the samples showed that doping with Dy 3+ ions and the addition of the Bi 2 O 3 sintering aid had not changed the physical structure of the sample material, indicating that the material was still a Z-type hexagonal ferrite. In addition, according to the magnetic hysteresis loops of the samples, all six groups of them exhibited typical soft magnetic properties . With an increase in the Dy 3+ ion doping concentration, the saturation magnetization intensity and coercivity of the samples initially increased and then decreased. The sample with a Dy 3+ ion doping concentration of 0.15 had the most uniform grain distribution, largest density, and smallest porosity among the samples. Additionally, that sample had the maximum values of the real parts of the magnetic permeability (7.89) and permittivity (13.90) while having a low magnetic loss (tanδ μ ≤0.04) and a low dielectric loss (tanδ ε ≤0.03). Thus, this type of magnetic dielectric materials will have significant potential for use in high-frequency antenna applications.
研究领域:
材料科学
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电磁学
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DOI
高影响因子
PHYSICS LETTERS A
·
2019
·
IF 2.087
Renping Cao,Longxiang Xu,Yaqin Ran,Xinyan Lv,Siling Guo,Hui Ao,Ting Chen,Zhiyang Luo
Ba 2 LaSbO 6 :Mn 4+ , Ba 2 LaSbO 6 :Mn 4+ , Dy 3+ , and Ba 2 LaSbO 6 :Mn 4+ , H 3 BO 3 phosphors are synthesized in the air by high temperature solid state reaction method. The particle sizes and sintering degree of Ba 2 LaSbO 6 :Mn 4+ phosphor may be changed by doping Dy 3+ ion and H 3 BO 3 . When the small amount of Dy 3+ ion and H 3 BO 3 are codoped, the emission intensity of Ba 2 LaSbO 6 :Mn 4+ phosphor can be enhanced 1.2–1.3 times and the quantum efficiency of Ba 2 LaSbO 6 :Mn 4+ phosphor can be improved. The lifetime of Ba 2 LaSbO 6 :Mn 4+ phosphor may be changed by doping Dy 3+ ion and H 3 BO 3 . The experimental results are valuable in research of luminescence property of Mn 4+ -doped luminescence materials.
研究领域:
材料科学
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光学
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DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2023
·Vol. 106
·期 6
·3654-3662
·
IF 3.9
Kailei Lu,Wenhan Han,Gang Cheng,Xinghua Zhu,Shirui Li,Hao Guo,Bosen Gu,Yucheng Ye,Jianqi Qi,Tiecheng Lu
Attaining effective warm white light emitting in functionally advantageous transparent polycrystalline ceramics is vitally important to guarantee the development of both human and botanical systems. In response to this aim, a series of Dy 3+ -doped Y 2 Zr 2 O 7 (YZO) transparent ceramics were prepared via a solid-state reaction and vacuum sintering approach in this work. These fabricated ceramics show high transparency, where the in-line transmittance at 700 nm is about 76%, which is very close to the theoretical limit (78%). In addition, under the excitation of UV light sources (358 and 384 nm), strong warm white light emissions were observed in these YZO:Dy transparent ceramics. The corresponding photoluminescence characteristics and mechanisms of YZO:Dy ceramics are investigated carefully. The Dy-doped YZO ceramics integrate with high transparency and UV-excitable warm white light emission properties, making them promising light-emitting converter materials for light-emitting source applications.
研究领域:
材料科学
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光学工程
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DOI
高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2012
·Vol. 12
·期 1
·151-158
·
IF 1.563
Liu Chenglu,Wang Fang,Jia Peiyun,Lin Jun,Zhou Zhiqiang
Eu3+ and Dy3+-doped YVO4 nanocrystallites were successfully prepared at 400 °C in equal moles of NaNO3 and KNO3 molten salts. X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy, transmission electronic
microscopy (TEM), photoluminescence (PL) spectrum and lifetime were used to characterize the nanocrystallites. XRD results demonstrate that NaOH concentration and annealing temperature play important roles in phase purity and crystallinity of the nanocrystallites, the optimum NaOH concentration
and annealing temperature being 6:40 and 400 °C respectively. TEM micrographs show the nanocrystallites are well crystallized with a cubic morphology in an average grain size of about 18 nm. Upon excitation of the vanadate group at 314 nm, YVO4:Eu3+ and YVO4:Dy3+
nanocrystallites exhibit the characteristic emission of Eu3+ and Dy3+, which indicates that there is an energy transfer from the vanadate group to the rare earth ions. Moreover, the structure and luminescent properties of the nanocrystallites were compared with their
bulk counter-parts with same composition in detail.
研究领域:
材料科学
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光学
✓ 已验证
DOI
PubMed
高影响因子
Materials Science and Engineering B-Advanced Functional Solid-State Materials
·
2022
·
IF 3.407
Xiaoting Chen,Lehui Liu,Yisheng Huang,Feifei Yuan,Lizhen Zhang,Zhoubin Lin
In this article, a series of Dy x Ca 3 Gd 2-x (BO 3 ) 4 (x = 0.02–0.2) polycrystalline compounds were synthesized by solid-state reaction to select the optimum concentration for single crystal growth, after then a 6.36 at.% Dy 3+ :Ca 3 Gd 2 (BO 3 ) 4 (Dy:CGB) single crystal with a disordered structure was successfully grown by the Czochralski method . The spectroscopic properties and Judd-Ofelt analyses of the crystal were carried out. Focusing on the absorption cross-section at 453 nm corresponding to the emission bands of InGaN laser diodes, the Dy:CGB crystal has a comparatively large value of 0.95 × 10 -21 cm 2 with a full width at half maximum (FWHM) of 10.2 nm. The yellow light emission cross-section at 576 nm is 2.2 × 10 -21 cm 2 with a FWHM of 14.0 nm. The Judd-Ofelt parameters Ω 2 , Ω 4 and Ω 6 were obtained to be 2.79 × 10 -20 cm 2 , 2.10 × 10 -20 cm 2 and 2.28 × 10 -20 cm 2 , respectively. The fluorescence lifetime of 4 F 9/2 → 6 H 13/2 transition was measured to be 0.26 ms. These results reveal that the Dy:CGB crystal is a promising yellow laser candidate.
研究领域:
材料科学
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光学
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DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2022
·
IF 4.171
Yang Jin,Lefu Mei,Ke Su,Qingfeng Guo,Libing Liao
Whitlockite-type structure phosphors have received extensive attention and research due to their adjustable chemical compositions in isomorphic compounds and providing rich crystal positions for doping activators. Ca 2.6 K 0.2 La 0.2 (PO 4 ) 2 whitlockite-type phosphors with Dy 3+ singly doping and Dy 3+ , Eu 3+ co-doping were prepared via high temperature solid-phase reaction, and the crystallographic characteristics, luminescence properties and temperature sensing performance were investigated in detail. The prepared phosphors are pure phase and both Dy 3+ and Eu 3+ enter into the matrix and produce blue, yellow and red emissions. The CCT values of the emitted light from Ca 2·6 K 0·2 La 0·2 (PO 4 ) 2 : Dy 3+ , Eu 3+ phosphors increase with the Eu 3+ concentration rises, changing from cold white light to warm white light. The integrated emission intensity of Dy 3+ in the phosphor decreases with the change in the doping ratio of Dy 3+ and Eu 3+ , causing by the energy transfer from Dy 3+ to Eu 3+ . The Ca 2·6 K 0·2 La 0·13 (PO 4 ) 2 :0.06Dy 3+ , 0.01Eu 3+ phosphor shows temperature sensing performance based on FIR technique, with the maximum relative sensitivity calculated to be 0.181% K −1 . All the results reveal that the Ca 2·6 K 0·2 La 0·2 (PO 4 ) 2 : Dy 3+ , Eu 3+ phosphors can be applied to w-LEDs and display devices, and can be used as a new type of optical thermometer.
研究领域:
材料科学
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光学
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DOI
高影响因子
JOURNAL OF NON-CRYSTALLINE SOLIDS
·
2021
·
IF 3.531
Shuhang Tian,Yipeng Lun,Yongsheng Sun,Dongdan Chen,Guowu Tang,Qi Qian,Zhongmin Yang
In this work, strong yellow emission was obtained in Dy 3+ doped multi-component phosphate glass due to its high asymmetry and covalency of the local field and high phonon energy. The internal quantum efficiency was measured to be 39.27% and the figure of merit was calculated to be 210.53 pm 2 × μs. What is more, silicate-clad Dy 3+ doped multi-component phosphate core glass fiber was successfully drawn by using a rod-in-tube method, which has a strong fluorescence emission in yellow spectra band. The Dy 3+ doping concentration is 2.6 wt.%, which is much larger than that of Dy 3+ doped (0.2 wt.%) ZBLAN fiber. These results suggest that the silicate-clad Dy 3+ doped multi-component phosphate glass fibers are potential host matrices for yellow laser.
研究领域:
材料科学
·
光学工程
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DOI
高影响因子
IEEE Photonics Journal
·
2025
·
IF 2.4
Yexi Sun,Qianyu Huang,Xin Guo,Maohui Yuan,Kai Han
Lanthanide-doped phosphors are of importance in the practical applications. In this work, we investigated the photoluminescence properties and random lasing behaviors of Dy3+-doped Sr2MgMoO6 phosphors synthesized by the high-temperature solid-state method. The SEM, XRD, and EDS with elemental mapping results reveal the successful fabricating of the high-quality Sr2MgMoO6 phosphors and confirm the uniform distribution of constituent elements. Structural characterization through precise Rietveld refinement confirmed that the material crystallizes in a tetragonal system with space group I4/m (No. 87), and its refined lattice parameters are also determined. The effect of different Dy3+ doping concentrations on the luminescent properties was analyzed. The optimal doping concentration for achieving efficient luminescence is fixed at 0.08 mol%. Typical emission peaks centered at 484 nm, 576 nm, 656 nm, and 756 nm of Dy3+ were observed under the blue light excitation. Additionally, random lasing phenomena were observed in the Sr2MgMoO6 phosphors when excited with a 355 nm pulsed laser under varying pump power densities. The random lasing behaviours were confirmed by the emergence of narrow emission peaks with a narrow full width at half maximum (FWHM) and the dependence of the intensity on the excitation intensity. This work highlights the potential of Dy3+-doped Sr2MgMoO6 phosphors as efficient luminescent materials and demonstrates their application in random lasing, which opens new possibilities for their use in optoelectronic and laser technologies.
研究领域:
材料科学
·
光电子学
·
光子学
·
固体物理
·
激光技术
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产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2025
·
IF 3.6
Kuo Shen,Yahong Jin,Yanmei Li,Yihua Hu
Inorganic scintillator materials have garnered widespread attention due to their applications in high-energy X-ray detection and imaging. However, developing materials that possess both high thermal stability and the capability to provide high-resolution X-ray imaging remains a significant challenge in this field. This article reports the synthesis of Ba 1.31 Ca 0.69 SiO 4 inorganic scintillator materials doped with Eu 2+ and Dy 3+ through a high-temperature solid-phase method. Their structure, photoluminescent properties under visible light and X-ray excitation, and thermoluminescence characteristics were thoroughly characterized. Experimental results indicate that the material's traps were enriched through the aliovalent substitution of Dy 3+ , enhancing the afterglow at room temperature. Under 350 nm excitation, the material demonstrated excellent thermal stability (maintaining 90% of its intensity at 150 °C compared to 30 °C) and a high quantum efficiency (IQE = 96.64 %). Furthermore, under X-ray excitation, the material exhibits a high electron storage capacity, which can be read out under near-infrared light at 870 nm, and can be rapidly erased under heating conditions or under visible light at 470 nm. Finally, we prepared flexible films using the phosphor, demonstrating a spatial resolution of 11.9 lp/mm −1 under X-rays, as well as showcasing the real-time and delayed imaging capabilities of the flexible film under X-ray exposure.
研究领域:
材料科学
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光学
·
医学影像
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 45
·期 45
·21066-21073
·
IF 3.591
Meng Kuang,Junhao Li,Jinjun Zhang,Jianhong Ding,Ziwang Zhang,Kangrong Huang,Nan Yang,Ziheng Zhang,Mingming Yang,Haiyong Ni
The radius of trivalent scandium ions is much smaller than those of other rare earth ions and thus research studies targeting the substitution of the scandium site with other light-emitting rare earth ions are rarely reported. In our present work, special attention is paid to the effect of Dy3+ doping on the crystal structure, atomic site occupancy and luminescence properties of the ScCaBO4 host as Dy3+ often serves as an individual activator for single-phase white light-emitting phosphors. Herein a series of ScCaBO4:Dy3+ phosphors were prepared by solid-state reactions. The phase composition was recorded by X-ray diffraction analysis and XRD refinement reveals that a pure phase could be maintained even when the Dy3+ concentration reaches 11%. Scanning electron microscopy (SEM) was utilized to observe the morphology and EDS mapping was used to investigate elemental distribution. The luminescence performances of the phosphors were investigated using UV-vis diffuse reflectance spectra, steady-state excitation and emission spectra and also transient luminescence decays. Dy3+ luminescence can be ascribed to its 4F9/2 → 6H15/2, 6H13/2 and 6H11/2 transitions, producing blue, yellow and red emissions. The Dy3+ concentration was further optimized at 3%, at which the CIE coordinates and fluorescence lifetimes were (0.425, 0.413) and 0.546 ms, respectively. Thermal quenching studies of the ScCaBO4:0.03Dy3+ phosphor show that Dy3+ luminescence at 400 K can maintain 60.91% of its initial value measured at room temperature. All the results indicate that the ScCaBO4:Dy3+ inorganic phosphors could be a promising single component phosphor for near-UV chip based WLEDs.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）