JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2025
·Vol. 108
·期 7
·e20518
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IF 3.8
Xiyuan Chen,Quanwang Niu,Peiqing Cai,Xiangfu Wang
Recent advances in inorganic negative thermal expansion (NTE) materials have highlighted their potential for multifunctional applications, yet challenges remain in optimizing their luminescent properties for practical use. Based on Y 2 W 3 O 12 :Tb 3+ /Eu 3+ NTE ceramics, we present a thermally regulated optical encoding and encryption approach. Under 254 nm UV excitation, the distinctive high-temperature thermal enhancement effect of red emission and the thermal quenching phenomenon of green emission were discovered in these ceramics, enabling an effective temperature-controlled color change phenomenon. Optical information encoding and readout were realized through the synergistic modulation effect of UV light and heat, and the encryption and decoding process of multivariate codes and alphabets at high temperatures was accomplished. The encoding was accomplished by modulating the Tb 3+ /Eu 3+ doping concentration ratio and regulating the luminescent color of the ceramics over a wide range. Furthermore, the ceramic demonstrates a wide temperature range of 363‒603 K for temperature sensing effect. This offers a research idea for achieving multifunctional ceramics of coding and temperature sensing.
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DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2020
·
IF 1.943
Xiangjia Meng,Shuai Huang,Mengmeng Shang
Red-emitting phosphors have attracted considerable interest for their applications in warm white light-emitting diodes (LEDs). A series of novel red emitting Eu 3+ -doped Ba 2 GdVO 6 phosphors were prepared by a solid-state reaction annealed at 1300 °C for 6 h. Under the excitation of blue light (465 nm), Ba 2 GdVO 6 :Eu 3+ phosphors emit pure red light. The critical distance at which concentration occurs is determined to be 8.7 Å when the doping concentration reached up to 20 mol%. More importantly, the as-prepared Ba 2 GdVO 6 :20%Eu 3+ phosphor exhibit good thermal stability. The PL intensity at 150 °C remains 72% of its initial intensity at room temperature. The preliminary studies show that the Ba 2 GdVO 6 :Eu 3+ might be a promising red material for application in blue light converted warm white LED.
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高影响因子
Advanced Physics Research
·
2024
·
IF 0
Zhichao Zeng,Haolin Lu,Zhengwei Yang,Haolin Wu,Chuang Zhang,Guankui Long,Yaping Du
Chiral hybrid organic-inorganic perovskites (HOIPs) are widely investigated due to their superior chiroptical and chiral spintronic properties. Research on the enhancement of chiroptical performance is highly important for the real application of chiral HOIPs. This work employed a rare earth doping strategy to increase the magnetic transition dipole moment of chiral 2D HOIPs R -/ S -NPB (NPB = 1-(1-naphthyl) ethylammonium lead bromide). Doping with Eu 3+ does not change the original layered NPB microstructure, and R -/ S -NPB-Eu exhibited the magnetic dipole-allowed transition luminescence of Eu 3+ at 594 nm ( 5 D 0 → 7 F 1 ). Circular polarized luminescence (CPL) spectra combined with theoretical calculations and transient photoluminescence measurements indicated that the introduction of Eu 3+ can enhance the magnetic transition dipole moment of R -/ S -NPB, thus resulting in an unprecedented g lum of 0.05. To the best of our knowledge, this is the highest value for chiral perovskite films. This work combines the unique and superior optoelectronic properties of rare-earth ions with chiral perovskite and develops an efficient strategy to increase its anisotropy factor, which can accelerate the development of chiral optoelectronics and spintronics towards real application.
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CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Long Chen,Sijie Su,Peijing Tian,Jian Yuan,Weihong Zheng
Rare earth elements have attracted significant attention due to their unique electronic structure. By doping rare earth ions into oxides, they can be used as spectral conversion materials in fields such as photovoltaic power generation and biological probes. In this paper, the performance of Eu 3+ doped Al 2 O 3 hollow microspheres by sol-gel method was analyzed by SEM, XRD, IR, TG-DSC, and fluorescence spectrometer. Using aluminum isopropoxide (Al(OC 3 H 7 ) 3 ) as raw material, PMMA with a particle size of 150 nm as the template, PMMA/boehmite particles with core-shell structure can be prepared by sol gel method and template method. After adding Eu 3+ and heat treatment, a transition occurred from γ-AlOOH(85 °C)→γ-Al 2 O 3 (600 °C)→θ-Al 2 O 3 (1000 °C)→α-Al 2 O 3 (1200 °C) as the temperature increased, and EuAlO 3 was generated at 1200 °C. Eu 3+ occupied the sites without inversion centers inside the host lattice, and the alumina was an effective matrix for the fluorescent properties of Eu 3+ . Its excitation was caused by the 7 F 0 → 5 L 6 transition, and its luminescence was controlled by the 5 D 0 → 7 F 2 transition, which can convert ultraviolet light into red and orange light. The fluorescence intensity increases with the increase of Eu 3+ content, and no quenching was observed at a doping concentration of 10mol% Eu 3+ .
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高影响因子
JOURNAL OF LUMINESCENCE
·
2019
·
IF 2.961
J. Zhang,Z.Y. Ma,J.G. Guo,G.M. Cai,L. Ma,X.J. Wang
Color-tunable phosphors based on a single host are superior to traditional mixed primary-color phosphors in fluorescent lamps, due to the better consistency of different color components in service. In this work, a series of Eu 3+ /Tb 3+ doped MgIn 2 P 4 O 14 phosphors were synthesized by a conventional solid state reaction method. The phosphors exhibit strong absorption around 254 nm with negligible absorption in the visible light region. Under the joint action of the co-activation, cross-relaxation, sensitization, and phonon-assistance, color-tunable reddish-orange-yellow-green-blue emission is achieved in MgIn 2 P 4 O 14 : Eu, Tb phosphors by adjusting the doping content, which demonstrates great potential for the application in fluorescent lamps.
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高影响因子
DALTON TRANSACTIONS
·
2022
·Vol. 51
·期 12
·4685-4694
·
IF 4.569
Guixian Li,Yu Xue,Qinan Mao,Lang Pei,Hong He,Meijiao Liu,Liang Chu,Jiasong Zhong
Luminescent thermometers provide a non-contact method of probing temperature with high sensitivity and response speed at the nanoscale. Synergistic photoluminescence from different activators can realize high sensitivity for luminescent thermometers by finely selecting ions with specific crystallographic sites. Herein, the more temperature-sensitive Mn4+ and the less-sensitive Eu3+ (or Sm3+) activators are co-doped into a Ca2GdSbO6 matrix to form an effective thermometer, where Mn4+ and Eu3+ (or Sm3+) ions occupy the Sb5+ and Gd3+ sites, respectively. The co-doping of Eu3+ ions or Sm3+ ions leads to lattice expansion of Ca2GdSbO6 matrix and a tuned narrow emission from deep-red to orangish-red. According to the ratio of luminescence intensity, the maximal Sa and Sr values are 0.19 K−0 (347 K) and 1.38% K−( (420 K) for Ca2GdSbO6:Mn4+/Eu3+ probe and 0.26 K−p (363 K) and 1.55% K−( (430 K) for Ca2GdSbO6:Mn4+/Sm3+ probe thermometers, respectively. In addition, thermometers based on Mn4+ emission lifetimes can provide the highest relative sensitivity of 1.47% K−s at 425 K. Thus, the highly-temperature-sensitive Ca2GdSbO6:Mn4+/(Eu3+ or Sm3+) phosphor is a promising candidate for practical luminescence thermometers.
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高影响因子
POLYHEDRON
·
2025
·
IF 2.6
Kuiyu Yi,Congyin Zhang
A meticulously crafted nanoscale fluorescence sensor, featuring Eu 3+ -functionalized ZIF-8 (Eu 3+ @ZIF-8), has been triumphantly synthesized utilizing a streamlined and effective process. This fluorescence sensor ingeniously harnesses the robust complexation between oxytetracycline (OTC) and Eu 3+ ions within Eu 3+ @ZIF-8, markedly augmenting the characteristic fluorescence of Eu 3+ via an exquisite antenna effect. This enhancement facilitates ultrasensitive fluorescence-based sensing of OTC. This groundbreaking application introduces a novel paradigm for OTC detection, accompanied by an exhaustive elaboration on the potential mechanism underlying OTC testing. The Eu 3+ @ZIF-8 fluorescence sensor stands as an exemplary advanced tool for OTC detection, evidenced by its remarkable attributes: swift response, unparalleled selectivity, and exquisite sensitivity. Its application in detecting spiked OTC in environmental samples, such as lake water and tap water, has demonstrated impeccable performance, validating its reliability and presenting a versatile platform technology with vast potential for environmental monitoring.
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高影响因子
CHEMICAL PHYSICS LETTERS
·
2014
·
IF 1.991
Lina Liu,Hongyu Xiao,Xiuyun An,Yongsheng Zhang,Ruifei Qin,Lishuang Liu,Dongmei Zhang,Ruirui Sun,Linfeng Chen
Well-dispersed YVO 4 :Eu 3+ nanoparticles (NPs) of about 8 nm were synthesized by a precipitation reaction and they were coated with SiO 2 by a reverse microemulsion method. The thickness of SiO 2 shells was altered by changing the molar ratio of tetraethoxysilane (TEOS)/YVO 4 :Eu 3+ . The influence of SiO 2 coating on the photoluminescence properties of the YVO 4 :Eu 3+ NPs was studied in detail. With the increase of the SiO 2 shell thickness, the intensity ratio of 5 D 0 - 7 F 2 / 5 D 0 - 7 F 1 becomes lower. It was interesting to observe that the quantum yield of naked YVO 4 :Eu 3+ is higher than that of YVO 4 :Eu 3+ @SiO 2 nanocomposites, and the result is opposite to a previous reference.
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高影响因子
MATERIALS LETTERS
·
2015
·
IF 2.489
Renping Cao,Ting Fu,Yunling Cao,Hui Ao,Siling Guo,Guotai Zheng
Novel Sr 3 P 4 O 13 :Eu 3+ , Bi 3+ red phosphor is synthesized by a solid-state reaction method in air, and the crystal structures, fluorescence lifetimes and luminescence properties are investigated. The PLE band peaking at 394 nm due to 7 F 0 → 5 L 6 transition indicates that the phosphor can be effectively excited by near-UV InGaN chip, and five PL bands within the range 570–770 nm are attributed to 5 D 0 → 7 F J ( J =1, 2, 3, 4, and 5) transitions of Eu 3+ ion, respectively. The optimal Bi 3+ doping concentration is~5 mol%. PL intensity of Sr 3 P 4 O 13 :0.04Eu 3+ phosphor can be enhanced~7 times by codoping Bi 3+ ion due to the energy transfer between Eu 3+ and Bi 3+ ions. The luminous mechanism and energy transfer process are explained by energy level diagrams of Bi 3+ and Eu 3+ ions.
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高影响因子
Heliyon
·
2024
·
IF 3.4
Yanru Yin,Mengmeng Jiang,Lianhua Tian
A series of GdY 2 SbO 7 :Bi 3+ , Eu 3+ phosphors were prepared using the conventional solid-state reaction. In this study, the photoluminescence properties and temperature sensitivity of the samples were investigated. When Bi 3+ and Eu 3+ were codoped into GdY 2 SbO 7 , the intensity of Bi 3+ decreased with increasing Eu 3+ concentration, indicating a potential energy transfer from Bi 3+ to Eu 3+ . To examine the temperature sensitivity of the sample, its emission spectrum was investigated in the range of 300–500 K. Based on different temperature dependences of Bi 3+ and Eu 3+ , the relative sensitivity ( S r ) and absolute sensitivity ( S a ) of the samples were calculated using the fluorescence intensity ratio (FIR) and thermochromic methods. In FIR modes, S r based on I Eu 3+ /I Bi 3+ reached 1.26 % K −1 at 500 K, while S r on double excitation method reached 1.36 % K −1 at 340 K. In addition, according to the thermochromic properties of GdY 2 SbO 7 :Bi 3+ , Eu 3+ phosphor, the temperature-sensing ability of the sample was investigated, and S r reached a maximum value of 0.5996 % K −1 at 300 K.
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高影响因子
OPTICAL MATERIALS
·
2018
·
IF 2.32
Fengping Ruan,Degang Deng,Ming Wu,Bowen Chen,Chengxiao Wu,Shiqing Xu
Single-host white-light emission phosphors stand a good chance to serve in the next-generation high-power white light emitting diodes . Eu 3+ -doped self-activated Ca 8 ZrMg(PO 4 ) 6 (SiO 4 ) phosphor was synthesized by a high temperature solid-state reaction which can realize white light emission by tuning spectrum. The analysis of XRD , SEM, UV–vis DRS , luminescent spectra, and emission dynamic curves were applied to investigate the obtained samples. Upon 295 nm excitation, the Ca 8 ZrMg(PO 4 ) 6 (SiO 4 ): Eu 3+ phosphors contain two dominating bands peaked at 470 and 615 nm, which are attributed to the charge transfer (CT) transition from Zr 4+ to O 2− and the characteristic transition 5 D 0 → 7 F 2 of the Eu 3+ ions, respectively. In view of the energy transfer between Zr-O CT and Eu 3+ ions, the chromaticity coordinates of Ca 8 ZrMg(PO 4 ) 6 (SiO 4 ): Eu 3+ phosphors can be tuned from (0.2186, 0.2858) to (0.5413, 0.3295). Present work indicates that the novel Ca 8 ZrMg(PO 4 ) 6 (SiO 4 ) is a promising candidate as a single-host white phosphor with an excellent thermal stability for optical display applications.
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高影响因子
LANGMUIR
·
2018
·
IF 3.789
Wen Deng,Fengjun Chun,Wen Li,Hai Su,Binbin Zhang,Meilin Xie,Haitao Zhang,Xiang Chu,Long Jin,Chao Luo,Weiqing Yang
Scheelite-structure tungstates with unique structural features and excellent luminescence possess promising applications, such as light-emitting diodes (LEDs), scintillators, and displays. The controllable growth of high quality and uniform composition thin films mounted on cheap substrates is a key factor to realize the above commercial applications, however, which is also a big challenge due to the difficult stress release stemming from intrinsic lattice mismatches. Here, we employed the simple and composition-controlled polymer-assisted deposition (PAD) method to successfully obtain a series of high quality and well-proportioned BaWO4:Eu3+ (BWOE) thin films with red emission. Screening out the unbound freedom metal ions by poly(ether imide) (PEI) and ethylene diamine tetraacetic acid (EDTA), the firmly bound metal ions (Ba2+, W6+ and Eu3+) in polymer solution were applied to accurately control the chemical composition and effectively governed the release of stress during the growth process of BWOE thin films. Furthermore, XRD, SEM and EDS mapping detections evidently authenticated the quasi-single crystallinity, uniform morphology and well-distributed composition of as-grown thin films. Additionally, excited by 250 nm light, these thin films could efficiently produce the red emission, peaked at around 612 nm originated from the 5D0 → 7F2 transition of Eu3+. Moreover, the optimal doping concentration of thin films was confirmed to be 9% and corresponding Commission International de l’Eclairage (CIE) chromaticity coordinate was (0.618, 0.365), which evidently implied the excellent color rending index. Therefore, this work highlights the rather superior PAD method to prepare uniform and high-quality BWOE thin films, which can be expanded toward the other photoelectric devices including white lighted-emitting diodes, scintillators, displays, and photoelectric detectors.
研究领域:
材料科学
·
光电子学
·
发光材料
·
薄膜技术
·
固态化学
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高影响因子
危险品化学品经营许可证（带存储）