MRS Communications
·
2024
·
IF 1.8
Wang Jun,Pan Xuexue,Li Zhirui,Xu Runkai,Zhang Peifeng,Lin Zhirui,Fan Yuliang,Xie Jinjie,Ke Jingping,Supiyeva Zhazira
In the presence of ethylenediaminetetraacetic acid (EDTA), a straightforward hydrothermal method was conceptualized for the purpose of controlling the size and form of the zircon-type tetragonal phase of LaVO 4 :Eu nanostructures. Nanorods and nanosheaves have been selectively obtained by tuning the pH value. In particular, LaVO 4 :Eu nanorods covered by EDTA molecules are soluble in water. In addition, research on photoluminescence has demonstrated that Eu 3+ -doped LaVO 4 nanorods exhibit significant red emission when exposed to ultraviolet light. This phenomenon has the potential to be utilized in a variety of disciplines, including visual display, catalysis, and biological imaging. Graphical abstract
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高影响因子
Inorganic Chemistry Frontiers
·
2023
·Vol. 10
·期 10
·2926-2938
·
IF 7
Xuexia Chen,Ran Pang,Shangwei Wang,Weihong Yuan,Jiangyue Su,Tao Tan,Su Zhang,Chengyu Li,Hongjie Zhang
Persistent luminescence (PersL) materials, especially sunlight excitable warm color (550–660 nm) PersL materials, have great practical value in information storage, emergency lighting and displays, and in vivo alternating current LED lamps. But up to now, designing and developing efficient sunlight-activated warm color PersL materials has faced huge challenges. Here, we present a novel Eu3+-doped CaNaSb2O6F yellow-orange PersL phosphor. The charge transfer transition of the phosphor occurs in the near UV region (peaking at 336 nm), which enables the phosphors to be excited effectively under the irradiation of natural sunlight or a low-energy mercury lamp (365 nm UV light) and to exhibit excellent yellow-orange (560–700 nm) PersL. The effective warm-color emission is dominated by the dual emission at 561 and 639 nm originating from the 5D1 → 7F2 and 5D0 → 7F3 transitions of Eu3+ ions in the CaNaSb2O6F lattice with a symmetrical coordination environment. Impressively, this new phosphor can be recharged rapidly and effectively in various conditions using natural sunlight, which lays a foundation for the long-term stable operation of phosphors in practical applications. Based on the study of thermal luminescence and defects, a feasible hole detrapping PersL mechanism was proposed. This study opens up a new avenue for research into improved sunlight-excited warm color PersL materials in the future.
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高影响因子
OPTICS LETTERS
·
2020
·Vol. 45
·期 10
·2752-2755
·
IF 3.714
Ke Li,Tingting Chen,Huibing Mao,Ye Chen,Jiqing Wang
The inverse opal ${\rm LaPO}_4 {:}{{\rm Eu}^{3 + }}$ was successfully fabricated by the sol-gel method, and characterized by the scanning electron microscopy, transmission electron microscopy, X-ray diffraction (XRD), and photoluminescence investigations. The inverse opal ${\rm LaPO}_4 {:}{{\rm Eu}^{3 + }}$ sample has a different emission in comparison with the ordinary luminescence emission bands of ${{\rm Eu}^{3 + }}$ ion at 590, 615, and 695 nm. In the inverse opal structure, the strongest emission is the transition ${^5{{\rm D}_0}{ \to {^7}{\rm F}_4} }$ at about 695 nm, which may be due to the fact that the emission in the plane decreases because of the photonic band structure and the corresponding emission in the vertical direction increases. For the emissions at 590 and 615 nm of the ${{\rm Eu}^{3 + }}$, the results show that the emission ratio of 590 to 615 nm increases from 0.266 to 0.639 for the inverse opal sample in comparison with the ordinary sample, which means that the ratio increases about 2.4 times for the inverse opal sample. An appropriate reason is that in the inverse opal sample the magnetic dipole emission ${^5{{\rm D}_0}{ \to }{^7{\rm F}_1} }$ will increase in comparison with the electric dipole emission ${^5{{\rm D}_0}{ \to }{^7{\rm F}_2} }$.
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高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2021
·Vol. 104
·期 6
·2721-2729
·
IF 3.784
Xianju Zhou,Jie Zhang,Lingni Chen,Yanhong Li,Guotao Xiang,Sha Jiang,Li Li,Xiao Tang,Zhongmin Cao,Guangxin Xie
A series of novel red emission phosphors Sr 3 Lu 1- x (VO 4 ) 3 : x Eu 3+ ( x = 0.007, 0.009, 0.02, 0.04, 0.06) were synthesized successfully by traditional high-temperature solid-state reaction. The results of X-ray diffraction (XRD) reveal the doped Eu 3+ ions have replaced the lattice sites of Lu 3+ ions. The diffuse reflectance spectra illustrate the energy gap of Sr 3 Lu(VO 4 ) 3 host is 3.61 eV. The room-temperature steady-state fluorescence spectra show that these phosphors can be effectively pumped by the charge-transfer band (CTB) of the host in near ultraviolet (NUV) spectral region and then produce strong and pure red emission at 615 nm originated from 5 D 0 → 7 F 2 electric dipole transition of Eu 3+ . The Commission Internationale de L’Eclairage (CIE) coordinates of Sr 3 Lu 0.96 (VO 4 ) 3 :0.04Eu 3+ are (x = 0.65, y = 0.35), which are very close to the red standard of National Television Standards Committee NTSC (0.67, 0.33). The fabricated warm white-light-emitting diodes (LED) demonstrate high color-rendering index Ra as 93. The results imply the red-emitting Sr 3 Lu(VO 4 ) 3 :Eu 3+ phosphors could be potentially utilized in the fields of solid-state lighting.
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高影响因子
Journal of Materials Chemistry C
·
2022
·Vol. 10
·期 19
·7594-7603
·
IF 8.067
Dehua Wang,Lixiang Chen,Longlong Jiang,Yang Yu,Ye Lu,Hebin Li,Yang Li,Zifei Meng,Qi Su,Yongcheng Zhang,Xiaoxiong Wang
Traditional functional materials are the mainstream of modern materials science research. Recently, flexible inorganic functional materials have emerged, opening a new area of materials science. Among the multiple flexible inorganic functional materials, flexible inorganic luminescent materials are the most typical ones due to the compatibility between their nanostructure and luminescence, and are the best choice for investigation for new applications in this field. The luminous intensity of flexible inorganic luminescence materials increases with the increase of calcination temperature, but the macroscopic flexibility decreases with the increase of calcination temperature, which leads to the urgent demand of having a flexible inorganic luminescence material with both good macroscopic flexibility and high luminescence. In this paper, the famous inorganic luminous material CaYAl3O7:Eu3+ was successfully prepared by electrospinning into a macroscopically flexible form. The macroscopic flexibility and luminescence of a pure inorganic CaYAl3O7:Eu3+ nanofiber membrane were systematically investigated. After calcining at high temperature, the grain size increases, which is beneficial to luminescence. However, reducing the calcination temperature will further optimize the flexibility of the membrane. At the same calcination temperature, the maximum bending strain of the inorganic CaYAl3O7:Eu3+ nanofiber membrane is about 2.4 times that of the inorganic CaTiO3:Pr3+ nanofiber membrane, and the macroscopic flexibility of the inorganic CaYAl3O7:Eu3+ nanofiber membrane is obviously better than that of the inorganic CaTiO3:Pr3+ nanofiber membrane. This study provides an idea for the preparation of high-temperature macroscopically flexible inorganic functional materials.
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高影响因子
OPTICAL MATERIALS
·
2022
·
IF 3.754
Chunhao Wang,Shuai Zhang,Qiongyu Bai,Yuan Wang
From the practical point of view, the luminescent thermal behavior of phosphors is an important factor. In this work, two factors are found to influence the thermal quenching behavior of Eu 3+ in a series of Eu 3+ doped K 5 Bi(Mo x W 1- x O 4 ) 4 solid solution phosphors. These factors are the energy of the charge transfer state (CTS) and the thermal ionization process. With the introduction of Mo in the host matrix, the energy of CTS decreases, and the thermal ionization process is enhanced, which leads to a deterioration of thermal stability in solid solution phosphors. The thermal stability is improved by increasing the doping content of Eu 3+ , which may correlate to the weakening of the thermal ionization process. The K 5 Bi 0.7 (Mo 0.5 W 0.5 O 4 ) 4 :0.3Eu phosphor possesses favorable color stability and color purity at high temperatures. Meanwhile, such phosphor matches well with a 365 nm LED chip and exhibits intense and pure red emission at a drive current of 200 mA.
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高影响因子
RSC Advances
·
2016
·Vol. 6
·期 76
·72149-72154
·
IF 3.289
Bin Dai,Degang Deng,Hua Yu,Lei Lei,Yinyan Li,Chenxia Li,Shiqing Xu
Carbon dots, the new member of carbon materials, have attracted much attention for their alluring optical properties showing intense blue and green emission. Herein, carbon dots were synthesized by the hydrothermal method. Eu3+ β-diketonate complexes with characteristic emission were selected as the lanthanide resource. Silica-based ionogels were prepared by a sol–gel route, the ionic liquids in the ionogels were extracted with acetonitrile, and nano-sized pores among the ionogels were obtained. The carbon dots and Eu3+ complexes were homogeneously entrapped in the ionogels without any devitrification by doping the ionic liquid solution in the silica network of the ionogels. The obtained Eu3+-doped ionogel-functionalized carbon dot monoliths are transparent and uniform with promoted mechanical properties and stability. The carbon dots were confined in the nano-sized pores among the ionogels, resulting in there being a certain distance between the carbon dots, as well as preventing them from aggregating, which contributed to a high photoluminescence. The monoliths emit bright white photoluminescence under UV excitation after various studies of the proportion of carbon dots and Eu3+ complexes. Eu3+-doped ionogel-functionalized carbon dot monoliths provide new potential for applications of carbon nanoparticles in optoelectronic devices.
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高影响因子
JOURNAL OF LUMINESCENCE
·
2025
·
IF 3.6
Yusong Du,Ning Wang,Qian Sun,Xiaofei Wu,Zhicheng Wang,Bo Li,Wei Liu,Guihua Li,Shuai Cheng,Lin Li,Huan Li,Jingtai Zhao
A novel mechanoluminescent (ML) material, Y 3 GaO 6 :Eu 3+ , which exhibits red ML emission under mechanical stimulation, is reported in this paper. The crystal structure belongs to the orthorhombic crystal system with the space group Cmc2 1 . Photoluminescence (PL) results indicate an optimum emission wavelength of 612 nm under 253 nm excitation, with an optimal Eu 3+ doping concentration of 0.09. The luminescence intensity of the sample, when subjected to both frictional and tensile stimuli, shows a linear dependence on the magnitude of the applied stress within the tested range. ML and thermoluminescence (TL) results suggest that the ML originates from electron release from traps. Furthermore, X-ray photoelectron spectroscopy (XPS) confirmed oxygen vacancies as the primary traps, with their concentration trend closely matching the ML intensity trend. In conclusion, this study demonstrates the potential application of Y 3 GaO 6 :Eu 3+ in stress distribution visualization, highlighting its broad prospects in the field of intelligent stress sensing.
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高影响因子
ChemistrySelect
·
2026
·Vol. 11
·期 36
·e74577
·
IF 2.3
Haixia Hu,Yiying Shi,Zhongyu Duan,Wenjun Zhang
Zirconium-based metal–organic framework (MOF) UiO-66 is a commonly used host framework material in the research field of fluorescent probes. However, the pure UiO-66 material lacks functional sites for targeted recognition and thus cannot achieve specific fluorescence detection. In view of this, terephthalic acid (TPA) and 2,6-pyridinedicarboxylic acid (DPA) were used as mixed ligands to coordinate with Zr 4+ for constructing a MOF in this paper. Subsequently, 4-methyl-7-hydroxycoumarin (4-Mu) and Eu 3+ were introduced for functional modification, and UiO-66(DPA)@4-Mu/Eu 3+ fluorescent material with dual emission centers was finally synthesized. It was investigated that UiO-66(DPA)@4-Mu/Eu 3+ can serve as a dual-emission ratiometric fluorescent probe for the efficient detection of doxycycline (DOX) content in aqueous solution. Under the excitation wavelength of 365 nm, the fluorescence color of the probe system gradually changed from blue to red with the increase of DOX concentration. Further analysis revealed that the fluorescence intensity ratio I 618 /I 430 of the system was positively correlated with DOX concentration, enabling highly sensitive detection of DOX with a limit of detection as low as 2.64 µM. Graphical Zr 4+ coordinates with terephthalic acid and 2,6-pyridinedicarboxylic acid as mixed ligands. 4-Methyl-7-hydroxycoumarin is introduced together with Eu 3+ to realize functionalization. The obtained UiO-66(DPA)@4-Mu/Eu 3+ material exhibits dual-emission property and can efficiently detect doxycycline in aqueous solution, which provides a new strategy for the functional design of metal–organic frameworks (MOFs).
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高影响因子
OPTICAL MATERIALS
·
2021
·
IF 3.08
Yuyu Shen,Yi Chen,Liang Chen,Degang Deng,Shiqing Xu
An optical thermometer Bi 3+ , Eu 3+ co-doped Sr 3 La 2 Ge 3 O 12 (SLGO) phosphor with dual-emitting centers was synthesized in high-temperature condition. The X-ray diffraction patterns , SEM , EDS , luminescent properties and optical temperature sensing characteristics were exhaustive investigated. Under UV excitation, the SLGO: Bi 3+ phosphor exhibits the 3 P 1 → 1 S 0 blue luminescence of Bi 3+ peaked at 400 nm and SLGO: Eu 3+ phosphor shows the 5 D 0 → 7 F 2 red luminescence of Eu 3+ peaked at 612 nm. The ET behavior was proved by spectrum overlap between the PL spectrum of Bi 3+ and PLE spectrum of Eu 3+ . Moreover, the decay time of Bi 3+ could be verified the conclusion. Under UV excitation of 291 nm, the maximal value of absolute sensitivity ( S a ) of SLGO: Bi 3+ , Eu 3+ was 0.079 %K −1 at 573 K, and relative sensitivity ( S r ) was 0.831 %K −1 at 473 K. The results proved that SLGO: Bi 3+ , Eu 3+ phosphor could have a good performance in the field of optical thermometer.
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高影响因子
PHYSICA B-CONDENSED MATTER
·
2026
·
IF 3.2
Tao Chen,Guangyao Zhu,Jing Li,Chaoying Yan,Yao Xiao,Caixia Yang
Li 2 ZnGeO 4 : Dy 3+ , Eu 3+ phosphors were successfully synthesized by solid-state reaction. The phosphor samples exhibited high-quality white light emission under 391 nm excitation. The optimal doping concentration of Eu 3+ in Li 2 ZnGeO 4 : Dy 3+ , Eu 3+ phosphors is 0.3%. Subsequently, as the doping concentration of Eu 3+ increases, a concentration quenching phenomenon occurs. The internal quantum efficiency of Li 2 ZnGeO 4 : 0.2Dy 3+ , 0.2Eu 3+ phosphor is 37.7%. Within the temperature range of 423K to 473K, Li 2 ZnGeO 4 :0.2Dy 3+ ,0.2Eu 3+ phosphors exhibit excellent thermal stability, with a thermal quenching activation energy of 0.2472 eV. The luminous intensity at 423 K can be maintained at more than 76.0% of the room temperature. The synthetic Li 2 ZnGeO 4 : Dy 3+ , Eu 3+ phosphors were combined and packaged with 387 nm ultraviolet chips to fabricate LED devices. Under the drive of current, they emitted bright white light with a color rendering index Ra of 80.7. When the current varies from 20 mA to 220 mA, the emission spectrum intensifies, indicating the stable illumination characteristics of the prepared Li 2 ZnGeO 4 : Dy 3+ , Eu 3+ phosphors. The characteristic of spectral stability enhancement under high current meets the high-load working requirements of lighting appliances and provides material support for the upgrading of related electrical appliances.
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高影响因子
MOLECULES
·
2023
·Vol. 28
·期 10
·4214
·
IF 4.6
Tianyun Du,Xiaojie Xue,Xiuxun Han
Rare earth silicate phosphors of high quantum efficiency with a stable performance are promising materials in the fields of display and illumination. The grain sizes of products synthesized via the conventional solid-state reaction method are usually too large to satisfy the requirements of color cast and extraction efficiency in high-resolution light-emitting devices (LEDs). We designed a synthetic route and successfully fabricated rare earth silicate NaGd9Si6O26(NGSO) sub-microcrystals with a size ranging from 550 to 1200 nm. The reaction mechanism and optical properties were systematically investigated. The quantum efficiency of Eu3+-activated NGSO sub-microcrystals was about 36.6%. The LED encapsulated with these sub-microcrystals showed lower color deviation and higher lumen efficiency and lumen flux compared to that with NGSO fabricated using the conventional solid state reaction method.
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PubMed
高影响因子
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