Materials Science and Engineering B-Advanced Functional Solid-State Materials
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2016
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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.
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Materials Science and Engineering B-Advanced Functional Solid-State Materials
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2025
·
IF 4.6
Yichong Song,Yuheng Zhang,Zengkun Li,Junlei Wang,Zhonglin Du,Yao Wang,Qiao Wang,Jun Li,Soo Wohn Lee,Laurence A. Belfiore,Jianguo Tang
Cyanate Ester Resins (CERs) are widely recognized for their excellent thermal stability and chemical resistance. However, their brittleness and high curing temperature limit their applications in key areas. To overcome these critical problems, this study investigates the enhancement of europium (Eu 3+ )-induced polystyrene- co -polyacrylic acid nano-aggregates (EIPAs) on the mechanical properties of EIPAs-doped bisphenol F dicyanate resin (EIPAs/F-CER). This modified F-CER exhibits significant improvements in tensile strength and flexural strength at the optimized concentration of 0.8 wt% EIPAs, corresponding to increases of 102.93 % and 121.72 %. At the same time, the thermal stability of this hybrid EIPAs/F-CER increases from 403.89 °C to 412.67 °C. Moreover, the photoluminescence property of the doped F-CER is optimally generated at 0.8 wt% EIPAs content, demonstrating excellent red emission at 612 nm. Therefore, the distinguished innovations of this work are (1) simultaneous enhancement of both mechanical properties and thermal stability, and (2) accompanying excellent red luminescence for potential temperature sensing. These achieved important results indicate that EIPAs are more effective in the mechanical enhancement of F-CER and capable of generating excellent luminescence and thermally stable flexible hybrid materials.
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Nanomaterials
·
2026
·Vol. 16
·期 13
·811
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IF 4.8
Linhui Gao,Yifu Liu,Hongliang Zhu,Yuan Wang,Qiuying Wang,Xinggang Shan
YBO 3 :Eu 3+ phosphors are regarded as strong candidates for high-performance luminescent materials owing to their excellent luminescence efficiency. In this study, novel YBO 3 :Eu 3+ porous/hollow microspheres were synthesized via a simple, continuous ultrasonic spray pyrolysis (USP) process using different organic additives. XRD analysis confirms that all samples crystallize in a pure hexagonal YBO 3 phase, indicating that the additives do not affect phase formation. Electron microscopy reveals a clear morphological evolution from solid to porous and hollow microspheres, with tunable shell thickness and cavity size. Compared with solid microspheres, the obtained hollow microspheres significantly reduce the consumption of rare earth materials with minimal influence on luminescence properties. The results suggest that hollow microspheres are promising substitutes for solid microspheres in the field of rare earth phosphors and the ultrasonic spray pyrolysis (USP) approach shows great potential in large-scale synthesis of morphology-controllable microspheres.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2026
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IF 6.7
Jiawen Li,Junhong Ran,Chaoyong Deng,Min Zhang
Eu 3+ -doped La 7 O 6 (BO 3 )(PO 4 ) 2 phosphors were synthesized using a high-temperature solid-state method. The phosphors with the optimal doping concentration ( x = 0.4 mol) exhibited strong red emission at 616 nm, demonstrating good thermal stability (70% at 398 K) under 465 nm excitation. Furthermore, tunable correlated color temperature (CCT) was achieved, and the fabricated red LEDs showed satisfactory CCT stability, with standard deviations of 0.00451 and 0.00447 for CIE x and CIE y , respectively. White LEDs made from this phosphor exhibited a good color rendering index R a = 92.6 and a high color temperature CCT = 5612 K. In addition, this phosphor can be used to display invisible anti-counterfeiting patterns, fingerprint visualization, and light-controlled encryption, demonstrating its multifunctional potential in solid-state lighting and security applications.
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CERAMICS INTERNATIONAL
·
2026
·
IF 6
Feng Tian,Ruirui Cui,Yixi Lu,Xiao Yang,Min Zhang,Chaoyong Deng
A suite of Eu 3+ -doped Na 3 Ca 2 TaO 6 (NCTO) red-emitting phosphors was prepared via a high-temperature solid-state reaction. Under 464 nm blue light excitation, these samples showed a prominent red emission peak at approximately 610 nm corresponding to the 5 D 0 → 7 F 2 transition. Optimal luminescence was achieved at a doping concentration of 25 mol%, where concentration quenching occurred mainly due to dipole–dipole interactions. Interestingly, this material displayed abnormal thermally enhanced luminescence, its emission intensity at 398 K was 32% higher than at room temperature. The activation energy for thermal quenching was determined to be 0.55 eV, and the internal quantum efficiency reached 60.86%. A WLED fabricated with the optimized NCTO:0.25Eu 3+ phosphor and a 395 nm LED chip exhibited a color rendering index of 91.4 and a correlated color temperature of 4687 K. Furthermore, this phosphor enabled clear visualization of tertiary-level details in latent fingerprint imaging and also showed promise for optical anti-counterfeiting applications.
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Journal of Energy Storage
·
2026
·
IF 10.7
Yong Tang,Yi Li,Junyin Chen,Chun Huang,Yujing Wang,Lirong Qin,Jianwei Zhao
Eu 3+ -doped MnCo 2 O 4 nanoneedle arrays were synthesized on nickel foam via a hydrothermal method. • The incorporation of Eu 3+ optimizes the electronic structure, substantially enhancing ion adsorption and diffusion kinetics. • The resulting material exhibits outstanding specific capacitance in both supercapacitors and aqueous zinc-ion batteries. • The underlying mechanism is elucidated through in situ Raman spectroscopy, ex situ XRD/XPS. This study proposes a multi-scale rare-earth engineering strategy that integrates Eu 3+ doping into MnCo 2 O 4 nanoneedle arrays grown on nickel foam, enabling simultaneous modulation of electronic structure, defect chemistry, and nanoscale morphology. A synergistic combination of in situ Raman spectroscopy, ex situ XRD/XPS, and electrochemical analysis reveals that Eu 3+ preferentially substitutes for Co 3+ , simultaneously boosting the conductive Co 2+ population, generating abundant oxygen vacancies, and stabilizing a reversible H + -driven MnOOH phase transformation during cycling. This modulation yields a specific capacitance of 500 F/g for supercapacitors and a specific capacity of 390 mAh/g for aqueous zinc-ion batteries at 1 A/g. The assembled asymmetric supercapacitor delivers 100 Wh/kg with ∼93% capacitance retention after 4000 cycles, while the zinc-ion battery retains ∼96% capacity over 5000 cycles. This study establishes a coherent “atomic-to-nanoscale” design strategy for developing durable, high-performance electrodes, offering a scalable and materials-efficient route toward next-generation energy storage systems with potential for integration into portable electronics and grid-level storage.
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CRYSTAL GROWTH & DESIGN
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2025
·
IF 3.4
Chonghui Niu,Mingjie Dan,Yi Yu,Xiurong Zhu,Yixin Fu,Yeqing Wang,Wang Zhao,Kenneth R. Poeppelmeier
In this study, a series of novel Eu3+-activated NaLu(MoO4)2 (NLMO) red phosphors were synthesized for the first time using hydrothermal, sol–gel, and microemulsion methods with varying active agents. The properties of these phosphors, including phase purity, crystal structure, DFT calculations, morphology, luminescence characteristics, thermal stability, and internal quantum efficiency, were comprehensively characterized. The results indicate that the ethylenediaminetetraacetic acid disodium salt (EDTA-2Na)-assisted hydrothermal method is the most suitable approach for the preparation of the phosphor. This method yields phosphors with a regular morphology, outstanding luminescence performance, relatively good thermal stability, and significantly high internal quantum efficiency. The internal quantum efficiency reaches 96.45%, and the phosphor exhibits good thermal stability, with the emission intensity at 423 K remaining about 73% compared to the initial temperature. The CIE chromaticity coordinate of the NLMO/0.13Eu3+ sample (0.667, 0.333) is very close to the standard chromaticity coordinate value (0.670, 0.330) from the National Television Standards Committee (NTSC). Remarkably, the color purity of the NLMO:0.13Eu3+ phosphor is an impressive 97%. Furthermore, Tb3+ was cointroduced in the NLMO:0.13Eu3+ phosphor, and its positive effects are discussed. Ultimately, a warm white light-emitting diode (W-LED) was fabricated using the studied NLMO:0.13Eu3+ phosphor with a 394 nm near-ultraviolet-emitting LED chip as the excitation source. The W-LED exhibits excellent properties such as high color purity, excellent correlation color temperature, and high color rendering index. Considering all of the results, the NLMO/Eu3+ red phosphor obtained by the EDTA-2Na-assisted hydrothermal method is an ideal red component for W-LEDs in various lighting applications.
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INORGANIC CHEMISTRY
·
2026
·
IF 4.6
Xinchi Ye,Wei Zhang,Gaokuo Du,Mengmeng Ma,Yige Wang,Huanrong Li
Lanthanide complexes of sufficient luminescence and stability are highly desirable for a wide variety of fields. We successfully synthesized a tetrakis(β-diketonate) complex, PPN[Eu(TTA)4] (TTA: thenoyltrifluoroacetone, PPN: bis(triphenylphosphine)iminium). The as-synthesized complex exhibits superior luminescence properties compared with its sodium analog (Na[Eu(TTA)4]) with a higher PLQY (77.4% vs 21.6%) and an extended fluorescence lifetime (0.61 ms vs 0.22 ms) as well as the enhanced stability including a higher thermal decomposition onset (280 °C) and markedly greater photostability (>95% intensity retained after 120 h sunlight). The enhanced photoluminescence is attributed to the PPN+, which reinforces molecular rigidity to suppress nonradiative decay and optimizes Eu3+ coordination microenvironment to promote ligand-to-metal energy transfer. When applied to latent fingerprint (LFP) visualization, PPN[Eu(TTA)4] emits high-contrast red luminescence under 365 nm ultraviolet (UV) excitation, enabling clear resolution of all three levels of fingerprint features (ridge patterns, detail points, and sweat pores) on diverse substrates (porous, nonporous, and semiporous). Preliminary studies further demonstrate that PPN[Eu(TTA)4] possesses efficient X-ray radioluminescence, suggesting potential cross-application in hidden fingerprint detection. This work clarifies the critical role of PPN+ in regulating Eu3+ complex performance and provides a novel strategy for developing high-performance luminescent materials for forensic science and optical engineering.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
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IF 6.371
Jin Liu,Yaowei Guo,Yupeng Bi,Yao Wang,Yanxin Wang,Matt J. Kipper,Laurence A. Belfiore,Jianguo Tang
Reversible bright-dark luminescence nanomaterials have been developed for information storage and anti-counterfeiting in recent years, however, their monochrome characteristic and 2D patterning impose limits on the effective information storage density. In this work, a new strategy for producing ultraviolet switchable and stable luminescent patterns is proposed, based on Ln 3+ (Eu 3+ /Tb 3+ ) induced-polyelectrolyte aggregates (LIPAs) with sharp multi-color optical properties . Under 365 nm excitation, a multicolor pattern can be observed using both red and green, which is not visible when this excitation light source is off. The LIPAs enable the luminescent lanthanide complexes to be compatibilized with poly(lactic acid) (PLA). Functional anti-counterfeiting patterns were prepared by 3D printing using luminescent PLA containing by Ln 3+ (Eu 3+ /Tb 3+ ) LIPAs. Invisible, adjustable and ultra-stable multicolor luminescent patterns well enable information storage and enhance information security for anti-counterfeiting applications.
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Foods
·
2022
·Vol. 11
·期 21
·3388
·
IF 5.561
Xijuan Tu,Yunmin Tao,Jiaxu Chen,Chunping Du,Qian Jin,Yuchang He,Ji Yang,Shaokang Huang,Wenbin Chen
In the present study, a lanthanide fluorescence sensor array was developed for the discrimination of honey’s botanical origin. Dipicolinic acid (DPA) was used as the antenna ligand for sensitizing the fluorescence of Tb3+and Eu3+to prepare the DPA-Tb3+/Eu3+complex. This lanthanide fluorescence sensor showed a cross-reactive response to the major constituents of honey, which led to the result that different classes of honey solution exhibited distinct quenching effects on the fluorescence of the DPA-Tb3+/Eu3+complex. Furthermore, a fluorescence sensor array composed of ten sensors was constructed by adjusting the pH and the component of the DPA-Tb3+/Eu3+complex to show multivariate responses towards honey. The visual fluorescence image of the sensor array was recorded by using a smartphone under excitation with portable UV lamp. Results indicated that the pattern of the visual image was related with the botanical origin. After extracting the RGB value of each sensor in 96-well plate, the ratio of R/G was used for principal component analysis (PCA). The results showed that three classes of honey (astragalus, logan, and litchi) were well distinguished. Moreover, the value of principal component 1 (PC1) showed good linearity with the composition of mixing honey and could be used for semi-quantitative analysis. The proposed lanthanide fluorescence sensor array presents a visual and portable method for the discrimination of a honey’s origin without the use of analytical instruments, and might provide a novel and simple strategy for the measurement of food origin.Keywords:honey;botanical origin;lanthanide complex;fluorescence;sensor array
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CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Yuan Wang,Zhikai Liang,Kezhou Jiang,Yifang Lin,Daomiao He,Jinhui Liu,Weixian Wang,Jingfei Wang,Bin Deng,Dan Zhang,Ruijin Yu
A novel single-phase trivalent europium activated red-emitting SrLaNaTeO 6 phosphor was first synthesized in a process of traditional high-temperature solid-state. The phase purity, morphology, and spectroscopy of the prepared phosphor were analyzed. Under 395 nm excitation, the photoluminescence (PL) spectra of the SrLaNaTeO 6 :Eu 3+ products mainly contained five dominant sharp peaks. The intense red emission peak at 615 nm was the typical 5 D 0 → 7 F 2 electric dipole transition of Eu 3+ . The optimum product of high quenching concentration was the SrLaNaTeO 6 :0.90Eu 3+ , which reached a high internal quantum efficiency (IQE) of 90.6%. The SrLaNaTeO 6 :0.90Eu 3+ was estimated to have R c of 6.57 Å and possessed high color purity of 100.0%. The phosphors exhibited excellent thermal stability and high activation energy ( E a = 0.29 eV). The prepared white light-emitting diode (WLED) had a high color rendering index (CRI) R a of 92 and a low correlated color temperature (CCT) of 5008 K. In conclusion, the phosphors have potential as red components for WLEDs.
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Materials Today Chemistry
·
2022
·
IF 7.613
Peng Du,Jun Tang,Weiping Li,Laihui Luo,Marcin Runowski
Red-emitting phosphors play a vital role in reinforcing the quality of phosphor-converted white light-emitting diodes. Unfortunately, concentration quenching and unsatisfied thermal stability are still the inevitable shortcomings of the red-emitting phosphors. Herein, we utilized phase transition to simultaneously tailor the concentration quenching and thermal stability of Eu 3+ -activated NaYbF 4 (NaYbF 4 : x Eu 3+ ) nanoparticles , in order to overcome these limitations. With the increasing doping level, the resultant samples undergo a phase transition from cubic to hexagonal phase. Notably, the optimal doping content for Eu 3+ in the NaYbF 4 nanoparticles with cubic phase is 30 mol%. However, when the phase transition occurs, the concentration quenching takes place at a much higher doping concentration, i.e. the optimum content of Eu 3+ in the structure is increased to about 80 mol%. Moreover, with elevating the Eu 3+ content, the local coordination environment of Eu 3+ in the NaYbF 4 host lattice is changed from inversion (centrosymmetric) to non-inversion symmetry (non-centrosymmetric), which is further confirmed by the theoretical calculation results via Judd-Oflet theory. Furthermore, compared with cubic samples, the hexagonal NaYbF 4 :0.8Eu 3+ nanoparticles show improved thermal stability. Importantly, utilizing hexagonal NaYbF 4 :0.8Eu 3+ nanoparticles, a designed white light-emitting diode emits warm white light, with desired color coordinates (0.398,0.374), high color rendering index (86.3), and low correlated color temperature (3537 K). Besides, NaYbF 4 : x Eu 3+ nanoparticles and their flexible polydimethylsiloxane films exhibit potential applications in high-temperature optical anti-counterfeiting. This work may support a new perspective for tailoring the concentration quenching and thermal stability of various phosphors.
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