JOURNAL OF RARE EARTHS
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2026
·
IF 9.6
Chengyan Gao,Guojun Zhou,Yawen Deng,Qiufeng Shi,Lei Wang,Haijie Guo,Jianwei Qiao
Eu 2+ -activated phosphors are prominent candidates for next-generation solid-state lighting, but their performance is often limited by incomplete Eu 3+ reduction and poor thermal stability. Herein, we present a universal strategy combining a two-step synthesis with charge compensation to simultaneously stabilize Eu 2+ centers and suppress parasitic Eu 3+ . Initially, M 2 SiO 4 :Eu 2+ ( Pnma ) precursors were synthesized to promote effective Eu 2+ incorporation. Subsequent P 5+ co-doping induces charge-compensated substitution (Si 4+ →P 5+ ). This structural evolution yields the target phosphor phases: the yellow-emitting Li 2 SrSi 0.96 P 0.04 O 4 :Eu 2+ ( P 3 1 21) and the green-emitting Li 2 BaSi 0.96 P 0.04 O 4 :Eu 2+ ( P 6 3 cm ) with excitation/emission maxima at 394/580 and 365/520 nm, respectively. Importantly, the heterovalent substitution facilitates the Eu 3+ →Eu 2+ reduction and optimizes the defect distribution. Consequently, the photoluminescence quantum yield (PLQY) is significantly enhanced from 26% to 78% for Li 2 SrSi 0.96 P 0.04 O 4 :Eu 2+ and from 32% to 83% for Li 2 BaSi 0.96 P 0.04 O 4 :Eu 2+ , along with improved thermal stability (93.3%@450 K). Fabricated near-UV pumped white light-emitting diodes (LEDs) incorporating these phosphors demonstrate superior color rendering ( Ra = 91.1) and stable electroluminescence across varying currents. The robust Eu 2+ stabilization and charge compensation paradigm paves the way for rational design of high-performance phosphors for advanced lighting.
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高影响因子
ACS Applied Electronic Materials
·
2026
·
IF 4.7
Soumya Shukla,Rajnish Kurchania,Ramarajan Ramanathan
A highly conductive, transparent conducting electrode (TCE) based on Ba and Sb codoped tin oxide (BATO) has been successfully spray-deposited for dye-sensitized solar cell (DSSC) applications, offering a promising alternative to conventional fluorine-doped tin oxide/indium tin oxide (FTO/ITO) electrodes. ATO is one of the most extensively studied TCE materials. However, its commercialization remains limited due to suboptimal electrical conductivity and optical transparency. The present research focuses on enhancing these properties by introducing Ba as a codopant in ATO thin films. Barium codopant effectively decreases the grayish color and helps optimize oxygen-vacancy density, which enhances electrical conductivity in ATO thin film. The spray-deposited large-area (10 × 10 cm2) BATO thin film exhibits an enhanced optical transmittance of 86%, a low resistivity of 4.605 × 10–4 Ω·cm, and a minimum sheet resistance of 13.7 Ω/□ significantly outperforming the corresponding ATO film. Importantly, the suitability of BATO and ATO electrodes was evaluated in DSSC devices, and the obtained results were compared to those of DSSCs employing commercial FTO electrodes. A power conversion efficiency (η) of 3.27% was recorded for the DSSC employing the BATO electrode, outperforming the ATO-based counterpart, which exhibited an efficiency of 2.39%. Interestingly, the alternative BATO electrode significantly reduces the reliance on indium-based TCOs and mitigates the optimization challenges associated with FTO electrodes, thereby contributing to a more cost-effective fabrication of DSSC solar cell devices.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
·
IF 5.4
Yifeng Zhang,Meidong Lang
As the prevalence of bacterial infections on diverse material surfaces continues to rise globally, the demand for the development of surfaces with durable and effective antibacterial properties becomes more imperative. Herein, we developed a cationic polymer coating consisting of quaternized 4-vinylpyridine groups, 4-vinylpyridine groups, and butyl acrylate groups. Quaternized 4-vinylpyridine groups were utilized to confer antibacterial properties, while butyl acrylate groups were incorporated to enhance adherence to the substrate and flexibility of the material. The presence of the quaternary 4-vinylpyridine endowed the coating with excellent broad-spectrum antibacterial properties, with a maximum sterilization rate above 99%. The antibacterial properties assay revealed that the content of cationic group, the kind of substrates, as well as the length and type of alkyl chains significantly influenced the effectiveness and stability of antibacterial properties of cationic coatings. Cationic polymers can efficiently disrupt the integrality of the bacterial cell membrane, leading to the death of bacteria, which can be observed by scanning electron microscopy. In summary, the obtained cationic polymers that serve as effective, durable, and environmentally friendly antibacterial coatings without releasing harmful substances will have a much broader application potential in diverse application fields.
研究领域:
材料科学
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生物医学工程
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微生物学
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高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2021
·Vol. 127
·期 10
·1-9
·
IF 2.584
Meng Ke,Li Wenhua,Tang Xingui,Guo Xiaobin,Liu Qiuxiang,Jiang Yanping
Ferroelectric materials with the typical perovskite structure are widely used in capacitors, ultrasonic devices, oil drilling, transducers, and other fields. Lead-lanthanum-zirconium-titanate ceramics co-doped with Sn and Ba , have been widely investigated. However, there is little attention has been focused on the dielectric properties of barium-lanthanum-zirconium-titanate. Thus, in this work, Sn doped Ba 0.955 La 0.03 Zr 0.02 Ti 0.98 O 3 ferroelectric ceramics were prepared via a classical high-temperature solid state reaction. Scanning Electron Microscopy (SEM) was used to observe the surface appearance of ceramics. The X-ray diffraction (XRD) patterns at room temperature, indicate that the ceramics are well crystallized. Impedance properties and dielectric properties reflect the characteristic of typical high temperature dielectric relaxation behavior. The conductive activation energy and the relaxation activation energy are obtained through the calculation of the Arrhenius law. The fitting results show that the dielectric relaxation behavior at high-temperature, was related to the oxygen defect. The electrical modulus verified the partial short-range carrier migration, also contribute to the high-temperature dielectric properties.
研究领域:
材料科学
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固态物理
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高影响因子
Materials Today Physics
·
2024
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IF 10
Daiyuan Liu,Ru Zhao,Chao Wang,Zhichao Liu,Jian Zhang,Yuan Wang,Xue Yu,Jianbei Qiu,Xuhui Xu,Yichun Liu
High-quality phosphors with color tunability are urgently needed for the full-spectrum white light-emitting diodes (WLEDs) with healthy and comfortable lighting like the solar spectrum. Here, a Sr 2 Ga 2 SiO 7 : Eu 2+ phosphor with tunable luminescence color is reported, achieving a luminescence tuning from maize-yellow to yellow by changing the Eu 2+ ion concentration. Importantly, the quantum efficiency of BaSrGa 2 SiO 7 : 1.0 % Eu 2+ is as high as 85.7 % compared with 49.1 % of Sr 2 Ga 2 SiO 7 : 5.0%Eu 2+ , and the emission intensity of BaSrGa 2 SiO 7 : 1.0 % Eu 2+ retains 92 % of the room temperature (RT) emission intensity at 473 K by Ba 2+ substitution. Furthermore, the increase of Ba 2+ ion concentration also makes the phosphor achieve tunability from yellow to green. The as-prepared full-spectrum WLEDs exhibits a continuity spectrum like solar spectrum with an extremely high color rendering index of 93.5 and low correlated color temperature of 4562 K. This work provides new insights into the exploration of new phosphors for high-performance full-spectrum WLEDs devices.
研究领域:
材料科学
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光学工程
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高影响因子
CRYSTAL GROWTH & DESIGN
·
2021
·
IF 4.076
Xiaoqing Jiang,Hongping Wu,Hongwei Yu,Zhanggui Hu,Jiyang Wang,Yicheng Wu
Iodates capable of exhibiting large second-harmonic-generation (SHG) response, wide transparent windows, and ease in crystal growth are an ideal materials class for the design of mid-infrared (IR) nonlinear optical (NLO) crystals. In previous research, we have presented a new strategy for effectively designing noncentrosymmetric iodates on the basis of the structure-directing properties of d0 transition-metal (TM) oxide fluoride anions. However, due to the d–d electronic transition of TM cations, the band gaps of these TM-containing iodates are relatively small. In this study, we substituted TM cations of β-Ba[VFO2(IO3)2] (BVIF) with In3+ cations and successfully synthesized the first F–-containing indium iodate, Ba[InF3(IO3)2]. It has a similar structure and exhibits an SHG response equivalent with that of BVIF. Remarkably, however, the band gap of Ba[InF3(IO3)2] is larger than that of BVIF. The analysis of the structure–property relationship indicates that the enlarged band gap mainly originates from the removal of TM cations. In addition, due to the strong anisotropic polarization of the [IO3]− groups, Ba[InF3(IO3)2] can also exhibit a large birefringence (0.172@1064 nm), which not only is helpful for the phase-matching ability of Ba[InF3(IO3)2] in a wide wavelength range but also suggests that Ba[InF3(IO3)2] may be a potential birefringent crystal.
研究领域:
材料科学
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晶体学
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高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Faxiang Lu,Xiumin Xu,Yang Cao,Xingfu Zhou
The electron transport layer (ETL) plays an important part in perovskite solar cell (PSC) devices. TiO 2 nanorod arrays (TiO 2 NAs) is widely used as ETL for perovskite solar cells because of its excellent energy level matching. Furthermore, TiO 2 NAs provide the directed 1-D electron transmission channel. In this work, rutile TiO 2 NAs synthesized by one-step hydrothermal method were used as the ETL of carbon-based perovskite solar cells to improve the performance. The interface between the ETL and perovskite was modified by barium acetate to reduce interface defects, non-radiative recombination and improve the electron transport rate. The perovskite film based on the Ba@TiO 2 NAs exhibited larger grains and fewer grain boundaries, which was of positive significance for improving the power conversion efficiency (PCE) of devices. At the same time, we replaced the precious metal electrode and unstable organic hole transport layer (HTL) with carbon electrode, which reduces the manufacturing cost and improves the stability of the device. Finally, all inorganic HTL-free carbon-based perovskite solar cells based on Ba@TiO 2 NAs showed a champion PCE of 10.74%, which is 14.74% higher than the control device.
研究领域:
材料科学
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能源科学
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高影响因子
JOURNAL OF RARE EARTHS
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2023
·
IF 4.9
Falin Zhang,Xiaoying Liang,Rongfei Wei,Hai Guo,Fangfang Hu
In this work, a group of Bi 3+ /Eu 3+ -doped SiO 2 –Al 2 O 3 -MCO 3 (M = Ca, Sr, Ba) glasses were fabricated through melt-quenching method. Their structure and photoluminescence characters were studied via X-ray diffraction (XRD), UV–Vis transmission spectra (TRS), excitation spectra, emission spectra and decay lifetimes. The XRD results show that no nano-crystal phase forms in glass matrix with different doping concentrations of Bi 3+ and Eu 3+ ions. Through regulating optical alkalinity value, the intensity of Bi 3+ ions increases and the peak position shifts to red wavelength. The Bi 3+ /Eu 3+ co-doped glasses show a blue-white-yellow-red luminescence by changing concentration of Eu 3+ ions. Energy transfer efficiency from Bi 3+ to Eu 3+ can reach as high as 10.54%. At 423 K, the emission intensity of 55SiO 2 –10Al 2 O 3 –35BaO-0.25Bi 2 O 3 (GBE0.5) is 31.1% of that at 308 K. Meanwhile, the activation energy of the glass matrix is 0.251 eV. All results suggest that these Bi 3+ /Eu 3+ co-doped glass samples possess potential application in LED field.
研究领域:
材料科学
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光学
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2026
·
IF 3.1
Haihua Wang,Haonan Wang,Kewei Shu,Chaoxian Chen,Qing Liu,Rui Cao,Jiaheng Li,Xing Yang,Zhuyu Li
Owing to its high lithium-ion conductivity, the cubic garnet-phase material Li 7 La 3 Zr 2 O 12 (LLZO) is a widely adopted key component in the fabrication of composite solid-state electrolytes (CSSEs). Nevertheless, the advancement of all-solid-state lithium batteries (ASSLBs) is still hindered by two major challenges: the high intrinsic crystallinity of poly(ethylene oxide) (PEO) and poor interfacial stability. Herein, cubic garnet Li 6.3 La 2.7 Ba 0.3 ZrNbO 12 (LLBZNO) featuring Ba and Nb co-doping was first prepared by a conventional solid-state method. Following this, the material was dispersed within a PEO matrix to construct composite solid-state electrolytes. Adding LLBZNO served to decrease PEO's crystallinity while enhancing its mechanical flexibility and bolstering its interfacial compatibility with lithium metal. The optimized membrane demonstrated superior properties, including a high Li + transference number of 0.75 (at 60°C) and an extended electrochemical stability window of up to 5.1 V (vs. Li/Li + ) under the present testing conditions. It also showed an excellent ability to suppress dendrites, facilitating stable cycling at 0.1 mA cm −2 for 1500 h without short-circuiting. Furthermore, the LFP/LLBZNO–PEO/Li battery delivered a high discharge capacity of 101.6 mA h g −1 after 300 cycles at 1°C with nearly 99% coulombic efficiency. These findings highlight that LLBZNO-PEO composite solid electrolytes possess superior ionic transport, electrochemical stability, and mechanical robustness, providing a viable pathway toward the advancement of next-generation high-performance ASSLBs.
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Journal of Materials Chemistry C
·
2021
·Vol. 9
·期 42
·15112-15120
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IF 7.393
Wei Tang,Chuandong Zuo,Yingkui Li,Chaoyang Ma,Xuanyi Yuan,Zicheng Wen,Yongge Cao
Owing to the impact of robust thermal quenching, lanthanide-based luminescence thermometer operation can usually only be achieved within a comparatively small temperature scope (ambient temperature to 800 K). Here, this study presents a method for addressing the mentioned limits, and a luminescence thermometer with an ultra-wide temperature range has been achieved, which adopted Pr3+-doped Ba(Zr0.16Mg0.28Ta0.56)O3 transparent ceramic to be the optical temperature probe. Based on the high luminescence intensity and excellent thermal stability of the 3P0–3F2 hypersensitive transition of Pr3+ in Ba(Zr0.16Mg0.28Ta0.56)O3 transparent ceramic, the intensity ratio of the emissions at 624 nm and 649 nm was employed for temperature sensing in an ultra-wide range (293–873 K), and the maximal relative sensitivity reached 1.05% K−1, outperforming most existing luminescence temperature measurement transparent ceramics. Furthermore, in Pr3+-doped Ba(Zr0.16Mg0.28Ta0.56)O3 transparent ceramic, the lifetime of the 3P0–3H4 transition also exhibits prominent optical thermometry performance (303–873 K). The results presented in this work may be of high significance for the design of novel ratiometric/lifetime dual-mode optical temperature sensors in the high-temperature measurement field.
研究领域:
材料科学
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光学工程
·
温度测量技术
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高影响因子
APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
·
2022
·Vol. 194
·期 11
·5167-5184
·
IF 3.094
An Peide,Zhu Fenfen,Liu Shiji,Zhou Xiaolin,Wang Chunfang,Liu Yufeng,Meng Hao,Zhang Xia
Recently, metal–organic frameworks (MOFs) are considered to be the moderate hosts for the bio-enzymes owing to their unique 3D pores and controllable surface affinity to the target molecules. In this work, the benzoic acid (BA)–modulated UiO-66-NO 2 was introduced, and cytochrome c (Cyt C) was chosen as the target enzyme to evaluate the immobilization efficiency of the resulting UiO-66-NO 2 -BA. The immobilization conditions including pH, adsorption time, and temperature and the initial concentrations of BA were optimized. The adsorption kinetics and thermodynamics were analyzed to further explore the enhanced adsorption mechanism. It is worth noted that all the UiO-66-NO 2 -BA exhibited evidently enhanced adsorption capacities in comparison with the unmodified UiO-66-NO 2 due to the formation of the chemical bonds between the UiO-66-NO 2 -BA and cytochrome C, indicating the positive roles of BA modification. Finally, the activities of the immobilized cytochrome C were assessed by using the catalytic oxidation of ABTS in the presence of H 2 O 2 , which reactions were also conducted over the free cytochrome C for comparison. The evidently improved stability under definite pH range, prolonged durability against the organic solvents, and the good reusability of the immobilized cytochrome C highlight the prospect applications of functional MOF immobilized enzymes in the practical catalytic reactions. Graphical abstract
研究领域:
生物化学
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材料科学
·
酶工程
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高影响因子
Journal of Macromolecular Science Part A-Pure and Applied Chemistry
·
2012
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IF 0.887
Lijun Chen,Wei Jiang,Hongxin Shi,Hongke Wu,Juping Xiang
The novel poly (AN-BA-DFMA) was prepared via semi-continuous seeded emulsion polymerization. The resultant novel latex is characterized with FTIR and DSC. The reaction conditions for preparing the novel latex are optimized and studied in detail. Results show that the novel latex with small particle size and good stability and hydrophobicity can be obtained when the amount of emulsifiers is 6.0%, the mass ratio of OP-10 to SDBS is 2.0:1.0, and the amount of initiator and DFMA is 2.5% and 20%, respectively. Under such conditions, the conversion rate is high and the coagulation percentage is low.
研究领域:
高分子化学
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材料科学
·
功能材料
·
纳米材料
·
表面化学
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DOI
高影响因子
危险品化学品经营许可证（带存储）