ACS Applied Polymer Materials
·
2025
·
IF 4.7
Na Xie,Yan Zhang,Shuo Wang,Lixuan Yu,Wen Liu,Changchang Ma,Weiyan Wang
Silicon-based solar cells (Si-sc), which are the main force of the photovoltaics, are facing challenges, including poor resistance to environmental factors such as ultraviolet radiation aging, water vapor permeation, fire risk, and response only in the visible light spectra and potential induced degradation effect. Aiming to solve these problems, the multifunctional polyolefin elastomer (POE) films were fabricated through in situ grafting of a highly efficient Eu3+ complex Eu(AA)(TPPO)2(TTA)2 (ETAT, where AA denotes acrylic acid, TPPO stands for triphenylphosphine oxide, and TTA represents trifluoromethylacetone) in this work. Such a design improved the compatibility between POE and ETAT, leading to the high transparency of POE/ETAT films with a transmittance of over 92%. Moreover, due to the enhanced entanglement of POE chains with the grafted 1.00 wt % ETAT, the water vapor permeability was decreased by 45% and the higher volume resistivity was obtained with the increase of 255%. The fire retardancy and the antiyellowing properties were also improved. Especially, the good luminescent down-shifting property of POE/1.00% ETAT films can endow Si-sc with the enhanced conversion efficiency of 1.64% and increased ΔJsc of 0.78 mA cm−2, compared with the untreated POE films. This study offers a facile and promising strategy for developing multifunctional encapsulation films for the photovoltaic industry.
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高影响因子
OPTICAL MATERIALS
·
2021
·
IF 3.08
Rangwei Meng,Zhiyuan He,Xuanhui Luo,Chi Zhang,Mengwei Chen,Halfei Lu,Yingping Yang
In this study, NaGdF 4 :Yb 3+ , Er 3+ @NaGdF 4 :Eu 3+ (NGEY@NGE) core-shell rare earth nanoparticles are prepared by a simple hydrothermal method . After testing, the emission peaks are observed at 415, 525, 540 and 660 nm with an excitation light of 980 nm due to the up-conversion luminescence from rare-earth nanoparticles . Under light excitation at 395 nm, the rare-earth nanoparticles undergo down-conversion luminescence with emission peaks at 590, 610 and 695 nm. The resulting nanoparticles are introduced into the TiO 2 mesoporous layer of hole-conductor-free perovskite solar cells (PSCs) based on carbon counter electrodes to broaden the spectral response of the cells from the visible range to the near-infrared and near-ultraviolet regions, which can guarantee a high light absorption efficiency and corresponding accelerated generation of electron-hole pairs. The results suggest that the mixing of NGEY@NGE nanoparticles into mesoporous TiO 2 layer improves the power conversion efficiency of PSCs to 14.21%, which is 10.6% higher than that of the control cells, which can pave an effective way to improve the performance of PSCs with a broadened response range.
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高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2024
·
IF 3.8
Xiao Xiao,Long Li,Zhuang Wang,Qiao Yu,Xuanhao Huang,Xingyue Liu,Qingjiang Pan,Songdong Ding
Five amine-diamide ligands (DAMIA) with varying alkyl chain lengths and steric hindrances are developed for selective extraction of Am3+ over Eu3+ in high-acidity HNO3 solution with the aim of understanding the structure–activity relationship. The ability of these ligands to extract metal ions is closely related to their basicity. The weaker the basicity is, the stronger the extraction ability is. The substituent on the aminic N has more significant effect on the extraction ability than that on the amidic N. Among the five ligands, the DAMIA containing five branched 2-ethylhexyl substituents demonstrates the highest extraction ability and selectivity at molar acidity level. Slope analysis suggests the formation of a 1:1 metal/ligand extracted species, which is also supported by the results obtained from the UV–vis spectrophotometric titration. Furthermore, the analyses of Fourier transform infrared (FT-IR), time-resolved laser-induced fluorescence spectroscopy (TRLFS), and X-ray photoelectron spectroscopy (XPS) for the extracted complex indicate that one Eu3+ ion may be nine-coordinated by one ligand molecule in a tridentate manner via two amide O atoms and one tertiary amine N atom and three bidentate NO3– ions. There is no H2O molecule in the inner coordination sphere of central Eu3+. Additionally, based on the studies of solvent extraction and complexation, the extraction of metal ions follows the neutral complexation extraction model, and the corresponding thermodynamic parameters (ΔH, ΔS, and ΔG) are also presented.
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高影响因子
JOURNAL OF LUMINESCENCE
·
2023
·
IF 3.6
Lin Xiang,Xianju Zhou,Li Li,Faling Ling,Yanhong Li,Jingfang Li,Hongmei Yang
Eu 3+ ions are extensively employed as spectroscopic probes because of the particular emissions due to the unique 4f 6 electronic configuration. Herein, we have developed a series of interesting fluorescent powders of Eu 3+ activated Sr 2 MNbO 6 (M = Ga, In, Gd). When Sr 2 GaNbO 6 :Eu 3+ is excited by the photons in the range of charge transfer band (CTB), the dark red 5 D 0 → 7 F 4 transition predominates the emission, exhibiting an anomalous intensity even higher than that of 5 D 0 → 7 F 1 or 5 D 0 → 7 F 2 . Whilst, if the sample is pumped by f-f characteristic transitions, the hypersensitive 5 D 0 → 7 F 2 transition emerges as the strongest. However, Eu 3+ doped Sr 2 InNbO 6 and Sr 2 GdNbO 6 never demonstrate such results, 5 D 0 → 7 F 1 acts as the most intense one regardless of the excitation wavelength. It is found that Eu 3+ substitutes Sr 2+ site, and cuboctaherdron [SrO 12 ] with O h symmetry is likely to deform to triangular orthobicupola D 3h symmetry, leading to two non-equivalent crystal sites in Sr 2 GaNbO 6 host. But Eu 3+ replaces In 3+ and Gd 3+ position with O h symmetry and has only one site in Sr 2 InNbO 6 and Sr 2 GdNbO 6 . Based on the comparative study on the intensity of 5 D 0 → 7 F 0 transition, as well as the influence factors of temperature, the doping concentration on the relative intensity among 5 D 0 → 7 F J transitions, and the band gaps of these three hosts, the origin of the abnormal intense 5 D 0 → 7 F 4 is ascribed to the mixing of CTB and low-lying 4f 6 configuration as well as two non-equivalent Eu 3+ sites.
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高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2025
·
IF 5.4
Jianwei Dao,Liang Yang,Zhihao Jiang,Zihao Han,Tiqin Wei
Narrow-band red inorganic phosphors excited by near-ultraviolet (n-UV) light have significant application potential in the manufacture of white light-emitting diodes (LEDs) with high R9 index. Novel near-UV-excitable Eu 3+ doped K 3 Ca 2 (SO 4 ) 3 × (X = F, Cl, Br) halosulphate phosphors were synthesized via high-temperature solid-state reaction method. By modifying the non-activating ions in the host matrix, the luminescence properties of Eu 3+ were effectively enhanced across various matrices, thereby optimizing the performance of this series of phosphors. As-prepared phosphors can be activated under 397 nm excitation and emit red light at 619 nm, corresponding to 5 D 0 → 7 F 2 transitions of Eu 3+ . Optimization of the doping concentration revealed that the optimal Eu 3+ concentration for different host matrices is 0.13. Notably, the K 3 Ca 2 (SO 4 ) 3 F host matrix doped with Eu 3+ exhibits stronger emission intensity and better performance. The K 3 Ca 2 (SO 4 ) 3 F:0.13Eu 3+ phosphor exhibited long fluorescence lifetime of 0.42 ms and high color purity of 92.25 %. The emission intensity of K 3 Ca 2 (SO 4 ) 3 F:0.13Eu 3+ at 423 K can retain 89.5 % of its value at room temperature. A white LEDs device was fabricated by mixing and encapsulating K 3 Ca 2 (SO 4 ) 3 F:0.13Eu 3+ phosphor with commercial BaMgAl 10 O 17 :Eu 2+ blue and (Ba, Sr) 2 SiO 4 :Eu 2+ green phosphors onto 397 nm n-UV InGaN chip. The device emits bright white light and exhibits high color rendering index (Ra = 79.9, R9 = 86.5) and a suitable correlated color temperature (CCT = 5915 K) at 50 mA drive current. The results suggest that this work provides new assistance in achieving high color rendering white LEDs excited by n-UV light.
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高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Qincan Ma,Jinyuan Zhang,Junhao Ma,Shuang Fu,Ziyang Ren,Xianzhong Lin,Gechuanqi Pan,Yueli Zhang
Novel rare-earth borate luminescent materials demonstrate considerable potential for optoelectronic applications, yet their luminescent efficiency remains constrained by concentration quenching arising from high activator concentrations. Herein, a new type of non-centrosymmetric rare-earth borate Sr 3 BiY 3-x Eu x B 4 O 15 phosphors (x = 0.1, 0.3, 0.5, 0.7, 1.0) were synthesized via Y 3+ /Eu 3+ alloying. Such phosphors achieved enhanced luminescence while maintaining ultra-high activator concentrations. The research innovatively elucidates the dual-mechanism anti-concentration quenching within the system. Under 250 nm excitation, the highly efficient energy transfer from Bi 3+ sensitizer to Eu 3+ activator optimizes excitation energy migration pathways. This results in a 1.55-fold enhancement in relative emission intensity for the Sr 3 BiY 2.5 Eu 0.5 B 4 O 15 phosphor, accompanied by a marked improvement in photoluminescence quantum yield from 86.71% (Sr 3 BiY 2.9 Eu 0.1 B 4 O 15 ) to 96.76%. Under 394 nm excitation, the chain-like channels of Eu 3+ ions induced by the non-centrosymmetric configuration in the crystal significantly enhance cross-relaxation caused by the electric multipole interaction. Electron redistribution from the 5 L 6 state of one Eu 3+ to the 5 D 6 state of neighboring Eu 3+ via cross-relaxation elevates the population of 5 D 6 -excited electrons, thereby amplifying the relative emission intensity of Sr 3 BiY 2 EuB 4 O 15 by a factor of 4.54. Thermal quenching analysis demonstrates that Sr 3 BiY 2.5 Eu 0.5 B 4 O 15 retains 60% of its initial luminescence intensity at 503 K. This material integrates good thermal stability with multifunctional applicability, positioning it suitable for red light-emitting diode, optical display, and digital encryption fields. This work provides new insights into the structural-performance regulation to break the bottleneck of concentration quenching in novel rare-earth luminescent materials.
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高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Yingfang Li,Long Tian,Hai Wu,Chaoyong Deng,Weichao Huang
Developing high-efficiency and thermally stable deep-red-emitting phosphors is crucial for advancing agricultural illumination. Eu 3+ -activated phosphors hold significant potential in plant growth light-emitting diodes (LEDs). However, achieving highly efficient deep-red emission of Eu 3+ remains challenging owing to the weak 5 D 0 → 7 F 4 transition and thermal quenching. In this study, novel Ca 2 YAl 3 Ge 2 O 12 : Eu 3+ phosphors were successfully synthesized via high-temperature solid-state reaction. Under the excitation of 394 nm, the phosphors exhibited deep-red emission in the wavelength range of 550–750 nm. Notably, the strongest anomalous emission peak was found at 708 nm, corresponding to the 5 D 0 → 7 F 4 transition of Eu 3+ ions, which can be explained using structural analysis. Additionally, the phosphors showed good thermal stability, and its emission intensity at 423 K maintained about 84 % of that at 298 K. The internal quantum efficiency reached 67 %. Furthermore, a prototype LED device was fabricated using the optimized phosphors, and its emission spectrum widely overlaps with the absorption band of plant pigments. These results indicate that the Ca 2 YAl 3 Ge 2 O 12 : Eu 3+ phosphors possess great potential applications in plant growth LEDs.
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高影响因子
DALTON TRANSACTIONS
·
2025
·Vol. 54
·期 39
·14914-14925
·
IF 3.3
Fei Wang,Huihui Chen
Red-emitting phosphors with high thermal stability are of great significance for improving the performance of phosphor-converted white light-emitting diodes (pc-WLEDs). A series of Ba3La2W2O12:xEu3+ (BLWO:xEu3+, 0 ≤ x ≤ 0.12, Δx = 0.02) red phosphors excitable by UV-near UV and blue light were successfully synthesized via high-temperature solid-state reaction. The crystal structure, micromorphology, and optical properties of the BLWO:Eu3+ phosphor were systematically investigated. The emission spectrum of the BLWO:Eu3+ phosphor is dominated by the red emission at 616 nm originating from the electric dipole 5D0 → 7F2 transition of Eu3+. Notably, the 5D0 → 7F4 emission at 702 nm exhibits remarkable intensity, reaching approximately 70% of the strongest 5D0 → 7F2 emission (616 nm). The optimal Eu3+ doping concentration in the BLWO:Eu3+ phosphor was determined to be 0.06, with the concentration quenching mechanism governed by electric quadrupole–quadrupole (q–q) interactions. The BLWO:0.06Eu3+ phosphor demonstrates excellent quantum efficiencies with an internal quantum efficiency (IQE) of 62.91% and an external quantum efficiency (EQE) of 35.23%, along with outstanding thermal stability. Benefiting from these superior properties, the phosphor was successfully employed in WLED fabrication. The resulting device exhibits warm white light with CIE 1931 chromaticity coordinates of (0.3453, 0.3518) and a high color rendering index (Ra) of 80.3.
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PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Siping Wang,Zhaoyang Chen,Shala Bi,Zuyang Gao,Houjin Hu,Yi Liu,Bolong Zhang
Developing luminescent materials with lower cost and higher temperature sensitivity can provide more options for achieving precise optical thermometry. Therefore, the Tb 4 O 7 and Eu 2 O 3 co-doped BaO-ZnO-P 2 O 5 -B 2 O 3 glasses for optical thermometry were designed and synthesized using a high-temperature melting and quenching method. Due to the low optical basicity and the formation of defects of the glasses, the coexistence of Eu 2+ and Eu 3+ ions was achieved without the reducing agent. In Eu 2 O 3 doped glasses, the relative content variation of Eu 2+ and Eu 3+ ions was analyzed using high-resolution X-ray photoelectron spectroscopy. Emission spectra and fluorescence lifetimes confirmed the effective energy transfer processes between Eu 2+ and Tb 3+ or Tb 3+ and Eu 3+ , which play critical roles in the tunable white emission properties of the material. In the temperature-dependent fluorescence spectra, Eu 2+ ions exhibit significant thermal quenching behavior, which is key to achieving higher temperature sensitivity in optical thermometry. The Eu 2+ /Tb 3+ /Eu 3+ co-doped glasses were investigated for their optical temperature sensing behavior, utilizing the fluorescence intensity ratio techniques, within the temperature range of 273 K–498 K. The maximum absolute (at 498 K) and relative (at 273 K) sensitivity based on the fluorescence intensity ratio, were observed for Eu 2+ /Eu 3+ pairs were 0.145 K −1 and 1.46 % K −1 , respectively, outperforming the conventional Tb 3+ /Eu 3+ combination. Additionally, no significant fluctuation occurred during the repeated experiment. This work demonstrates that Eu 2+ /Tb 3+ /Eu 3+ co-doped BaO-ZnO-P 2 O 5 -B 2 O 3 glasses could be considered a promising candidate for optical thermometry.
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高影响因子
JOURNAL OF LUMINESCENCE
·
2022
·
IF 4.171
Wanli Li,Zhaoyang Chen,Bo Zhang,Pengjun Zhao,Yanwei Fan
Highly thermally stable BaZn 2 (PO 4 ) 2 : Dy 3+ /Eu 3+ glass-ceramic (GC) phosphors were synthesized using a high-temperature solid-state reaction and controlled-temperature pre-crystallization method. It is found that Dy 3+ -doped BaZn 2 (PO 4 ) 2 GC phosphors produce cold white light emission at 484 nm and 575 nm under 350 nm excitation with the optimal Dy 3+ doping concentration of 0.25 mol%. The theoretical analysis indicates that the dipole-dipole interaction might be the origin of the concentration quenching mechanism of phosphor. The Eu 3+ -doped BaZn 2 (PO 4 ) 2 GC phosphors produce orange-red emission at 592, 616, 654 and 700 nm under 395 nm excitation. More than that, tunable white light emission can be achieved by optimize the co-doped concentration of Eu 3+ on BaZn 2 (PO 4 ) 2 : 0.25Dy 3+ GC phosphor. The emission spectral intensity and luminescence decay curves from BaZn 2 (PO 4 ) 2 : 0.25Dy 3+ /yEu 3+ (range of y) GC phosphors show the energy transfer from Dy 3+ to Eu 3+ and the emission color can be tuned from cool white to warm white region with the color correlated temperatures (CCTs) reduction from 7299 K to 2520 K. The typical BaZn 2 (PO 4 ) 2 : 0.25Dy 3+ /1Eu 3+ GC phosphors have a high thermal stability with an activation energy of 0.30641 eV. Finally, the white LED devices were fabricated by coupling a 363 nm UV light-emitting diode chip with the BaZn 2 (PO 4 ) 2 : 0.25Dy 3+ /yEu 3+ GC phosphors. These results suggest that BaZn 2 (PO 4 ) 2 : Dy 3+ /Eu 3+ GC phosphors may be suitable candidates for single-component white light-emitting phosphors for application in UV-WLEDs.
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高影响因子
JOURNAL OF LUMINESCENCE
·
2022
·
IF 4.171
Xiangyan Yun,Jun Zhou,Yaohui Zhu,Xiong Li,Shan Liu,Denghui Xu
Recently, Mn 4+ -doped phosphors have attracted widespread attention in the field of indoor plant growth lighting on account of their strong far-red emitting properties. As a new type of dual-activator sensing system to further enhance the accuracy of temperature measurement, Mn 4+ and Eu 3+ ion co-doped double perovskite phosphors can simultaneously meet high temperature relative sensitivity and excellent signal discrimination ability for optical temperature sensing. In this work, a series of Sr 2 ScTaO 6 phosphors singly doped with Mn 4+ , and co-doped with Mn 4+ /Eu 3+ were synthesized. And the Mn 4+ -doping causes the spectra of the as-prepared phosphors to partially overlap with the absorption spectrum of plant pigments ( P R and P FR ), which demonstrated that the as-synthetized phosphors can be well used as a potential artificial light source for the field of indoor plant growth. Furthermore, we particularly make a thorough inquiry into the temperature sensing performance of the as-obtained Sr 2 ScTaO 6 :Mn 4+ , Eu 3+ phosphors at 300 K–500 K, and the maximum relative sensitivity can reach 3.66% K −1 . The above unique characteristics can prove that the as-obtained phosphors have the great potentiality to be used for indoor plant growth lighting and optical temperature sensing.
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高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Yuhong Zhang,Jingyi Zhang,Jingliang Zhang,Chenhao Han,Hang Liu
In this paper, a series of Zn 3 Mo 2 O 9 :Yb 3+ /Eu 3+ /Tb 3+ phosphor are prepared by solid-state reaction. The up-conversion(UC)/down-shifting(DS) luminescence properties are investigated in detail. The intensities of all emission bands present luminescence thermal enhancement under 980 nm excitation. From 293 to 493 K, the red emission intensity of Zn 3 Mo 2 O 9 :Yb 3+ /Eu 3+ sample increase by 2.36 times, and the green emission band intensity of Zn 3 Mo 2 O 9 :Yb 3+ /Tb 3+ sample increase by 4.85 times. The temperature-dependent cooperative energy transfer(CET) process of Yb 3+ ions has an important contribution to thermal enhancement due to the negative thermal expansion(NTE) of Zn 3 Mo 2 O 9 matrix. In addition, the optical temperature sensing properties of the Zn 3 Mo 2 O 9 :Yb 3+ /Tb 3+ /Eu 3+ phosphor are discussed according to the luminescence intensity ratio(LIR) technique. Zn 3 Mo 2 O 9 :Yb 3+ /Tb 3+ /Eu 3+ phosphor can obtain bright deep red, yellow and orange light under the excitation of 395, 487 and 980 nm, which is used for multi-mode fluorescence anti-counterfeiting.
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高影响因子
危险品化学品经营许可证（带存储）