JOURNAL OF LUMINESCENCE
·
2022
·
IF 4.171
Xiaoya Bu,Yan-gai Liu,Jian Chen
A series of original tunable-luminescence phosphors K 3 Lu(PO 4 ) 2 : Tb 3+ , Eu 3+ with efficient energy transfer (ET) was synthesized using a high-temperature solid-state reaction. The samples were characterized via X-ray powder diffraction, X-ray photoelectron spectroscopy, photoluminescence spectroscopy, CIE chromaticity coordinates, and fluorescence decay analysis. The energy band and density of states of K 3 Lu(PO 4 ) 2 were analyzed by the first-principles method. The cross-relaxation of Tb 3+ -doped phosphors was investigated as well. The ET from Tb 3+ to Eu 3+ ions, realizing through the electric dipole-dipole (d-d) interaction with a high ET efficiency of 98.36%, could be controlled principally by the Tb 3+ /Eu 3+ doping concentration ratio, yielding the tunable emissions from green (0.293, 0.537) to orange-red (0.563, 0.367) range. Based on the obtained results, a three-phosphor-conversion white light-emitting diode (w-LED) was fabricated through the integration of a 365 nm chip and commercial blue-emitting BaMgAl 10 O 17 : Eu 2+ phosphors, green-emitting SiAlON: Eu 2+ phosphors, and orange-red-emitting K 3 Lu(PO 4 ) 2 : 0.1 Tb 3+ , 0.06Eu 3+ phosphors. The appliance emits the white light at a suitable correlated color temperature of 3678 K and a high color rendering index of 91.4. These parameters are almost equal to those of ideal white light, which opens up the prospects for using this up-and-coming phosphor for warm w-LED applications.
✓ 已验证
DOI
高影响因子
Journal of Energy Chemistry
·
2023
·
IF 13.1
Cheng-Kun Wu,Shuai Zou,Chen-Wei Peng,Si-Wei Gu,Meng-Fei Ni,Yu-Lian Zeng,Hua Sun,Xiao-Hong Zhang,Xiao-Dong Su
The ultraviolet (UV) light stability of silicon heterojunction (SHJ) solar cells should be addressed before large-scale production and applications. Introducing downshifting (DS) nanophosphors on top of solar cells that can convert UV light to visible light may reduce UV-induced degradation (UVID) without sacrificing the power conversion efficiency (PCE). Herein, a novel composite DS nanomaterial composed of YVO 4 :Eu 3+ ,Bi 3+ nanoparticles (NPs) and Ag NPs was synthesized and introduced onto the incident light side of industrial SHJ solar cells to achieve UV shielding. The YVO 4 :Eu 3+ ,Bi 3+ NPs and Ag NPs were synthesized via a sol–gel method and a wet chemical reduction method, respectively. Then, a composite structure of the YVO 4 :Eu 3+ ,Bi 3+ NPs decorated with Ag NPs was synthesized by an ultrasonic method. The emission intensities of the YVO 4 :Eu 3+ ,Bi 3+ nanophosphors were significantly enhanced upon decoration with an appropriate amount of ∼20 nm Ag NPs due to the localized surface plasmon resonance (LSPR) effect. Upon the introduction of LSPR-enhanced downshifting, the SHJ solar cells exhibited an ∼0.54% relative decrease in PCE degradation under UV irradiation with a cumulative dose of 45 kW h compared to their counterparts, suggesting excellent potential for application in UV-light stability enhancement of solar cells or modules.
✓ 已验证
DOI
高影响因子
JOURNAL OF RARE EARTHS
·
2025
·
IF 7.2
Xianglong Li,Yige Wang,Huanrong Li
High-performance elastomers have attracted considerable scientific attention owing to their ubiquitous applications across industrial sectors and daily life scenarios. Despite their technological prevalence, the development of multifunctional elastomeric systems that simultaneously demonstrate exceptional mechanical robustness, remarkable self-healing capability, and intrinsic photoluminescent characteristics remains a critical challenge in advanced materials engineering. In this work, a photoluminescent self-healing polyurethane elastomer with synergistically enhanced network architecture was fabricated through strategic integration of hydrogen-bonded functional motifs and lanthanide (Ln 3+ ) coordination complexes featuring dynamic metal-ligand coordination bonds. Consequently, the elastomer achieves exceptional mechanical performance, a high strength of 64.04 MPa, an elongation at break of 2159.18% and an ultrahigh toughness of 512.32 MJ/m 3 , which is 3.2 times the toughness of typical spider silk (≈160 MJ/m 3 ), even surpasses the toughest spider silk found to date (≈ 354 MJ/m 3 ). These exceptional mechanical characteristics are principally attributed to the synergistic interplay between rationally architected Eu 3+ -ligand coordination clusters and hierarchically structured hydrogen-bonding domains comprising multifunctional acylsemicarbazide/urethane motifs. The hierarchical hydrogen-bond arrays and Ln 3+ -ligand coordination bonds function as dynamic and firm crosslinks, operating through reversible breakage-reformation cycles to dissipate mechanical energy. This network design simultaneously confers high strength, autonomous self-healing, and recyclability.
✓ 已验证
产品关联
DOI
高影响因子
CRYSTAL GROWTH & DESIGN
·
2025
·
IF 3.4
Chengyu Ni,Kaiting Wu,Chunxuan Chen,Xiaozhou Zheng,Man Xu,Wubin Dai
The design of a stably efficient and color-tunable photoluminescence (PL) phosphor, depending on the clear relationship between structure/composition and PL properties, remains quite a challenge. Herein, in pursuit of phosphor for white LED (wLED) lighting, chemical modification of the host (K3YSi2O7, KYS) and regulation of the energy transfer of dopants Bi3+/Eu3+ in multiple lattice sites (K/Y) are in detail investigated and achieved via a facile solid-phase reaction under air condition. Based on both experimentally and theoretically comprehensive analysis of structure (i.e., XRD/Rietveld refinement, density functional theory (DFT) calculations) and steady/transient-state spectroscopy (i.e., PL/PL excitation, decay lifetime), the adjustable and broad PL in the blue/cyan region of Bi3+ is originated from both the crystallographic sites of K1/Y2, while Eu3+ ions are more inclined to enter the Y2/Y1 sites and emit the characteristic high-purity red PL. Systematic PL tuning from blue/cyan to red is thus realized via efficient ET from Bi to Eu, and the corresponding PL and ET mechanisms are discussed and proposed. Intriguingly, significant enhancements of the PL intensity, quantum yield (QY), and thermal stability of the KYS: Bi/Eu are achieved via chemical composition modulation by artificially adding excessive K+ ions to the host to enhance the phase purity/crystallinity. By adopting the phosphor as a “warm” white color convertor, a wLED with high efficiency and color rendering index (CRI, 90.5) and low corrected color temperature (CCT, 4126 K) is constructed via a remote “capping” packaging strategy. Further, in view of the different thermal responses of the multisite occupancy of Bi3+, energy-level thermal coupling of Eu3+, and dual centers of Bi/Eu in KYS, a multimode and self-referenced thermometer is also designed based on the fluorescence intensity ratio (FIR) technology with high relative sensitivity.
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2019
·Vol. 7
·期 43
·13536-13547
·
IF 6.641
Dongjie Liu,Peipei Dang,Xiaohan Yun,Guogang Li,Hongzhou Lian,Jun Lin
Recently, controllable luminescence tuning and single-phased white light emission have been extensively studied to improve the luminescence performances of phosphors for white light-emitting diodes (WLEDs). In this work, the controllable photoluminescence tuning from bluish-green to red was successfully achieved in Bi3+,Eu3+-codoped Sr2−yBayLaGaO5 solid solutions, combining the effects of crystallographic site engineering and energy transfer. The phase composition and structural variation of the designed phosphors were thoroughly analyzed through X-ray powder diffraction (XRD) and Rietveld refinement. The effects of cation substitutions on the photoluminescence properties were investigated in detail and the corresponding mechanism was proposed. A regular red-shift of Sr2−yBayLaGaO5:0.02Bi3+ in the bluish-green region could be observed when Sr2+ was substituted by Ba2+, which is attributed to the crystal field splitting and nephelauxetic effect. The red-shift of emission of Ba2LaGaO5:0.02Bi3+ phosphor with gradually increasing excitation wavelength reveals that Bi3+ ions occupy different cation sites to form multiple luminescent centers. Besides, the efficient energy transfer was designed and successfully realized in Sr2−yBayLaGaO5:0.02Bi3+,zEu3+ (y = 0–2.0; z = 0–0.20) samples. The energy transfer efficiency can reach up to 88%, 91% and 77% at z = 0.20 for y = 0, 1.0 and 2.0, respectively. Moreover, the thermal quenching behaviors of the studied phosphors reveal that the codoping of Eu3+ could efficiently improve the thermal stability of Sr2LaGaO5:0.02Bi3+ phosphor. Finally, the WLED devices were fabricated by composing 370 nm UV chips and single-phased Sr2−yBayLaGaO5:0.02Bi3+,0.05Eu3+ (y = 0, 1.0, 2.0) phosphors. The as-fabricated devices presented relatively excellent EL performances, the color coordinates of which all locate in the warm white light region. These results indicate the as-prepared Sr2−yBayLaGaO5:Bi3+,Eu3+ phosphors can be potential candidates for color tuning and efficient single-phased white emission in UV-based WLED lighting applications.
✓ 已验证
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2021
·
IF 4.641
Yanzhen Yin,Zhen Wang,Maochen Zhu,Yue Zhang,Jianhong Li,Chao Dou,Shijia Sun,Bing Teng,Yang Che,Degao Zhong
A single-phased warm white phosphor of α-Sr 2 V 1.98 P 0.02 O 7 : 0.5 % Eu 3+ with low correlated color temperature (CCT) and high color rendering index (CRI) was synthesized by high temperature solid phase method. By changing the ratio of PO 4 3− /VO 4 3− , the emission intensity of VO 4 3− and the energy transfer efficiency of VO 4 3− →Eu 3+ can be effectively tuned, and the full-spectrum warm white light emission of phosphors in the range of 400−700 nm can be realized. Moreover, the temperature-dependent emission spectra and thermal quenching properties were investigated in detail. On this basis, the WLED prototype devices were packaged with the synthesized phosphors α-Sr 2 V 1.98 P 0.02 O 7 : 0.5 % Eu 3+ and 365 nm near-ultraviolet (NUV) chips and high-quality warm white light emission with CCT = 3188 K and CRI Ra = 93.5 were achieved. These findings provide new insights into exploring single-phased white phosphors for NUV-pumped warm w-LEDs with high CRI property and low CCT value.
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Xue Teng,Ning Li,Xiaohan Liu,Xintong Huo,Hong Shao,Yanke Xi,Jiacheng Mi,Dan Li,Guixia Liu,Xiangting Dong
It is crucial to develop color-tunable fluorescent materials with single-matrix. In this study, Electrospinning coupled with oxidative sintering is employed to successfully fabricate CaSnO 3 (CSO):RE 3+ (RE = Tb, Tb/Eu) one-dimensional nanofibers (NFs). To achieve multi-color luminescence and white-light emission in a single matrix, Eu 3+ ions are introduced into CSO:Tb 3+ 1D NFs to gain CSO:Tb 3+ /Eu 3+ 1D NFs. In the CSO:Tb 3+ /Eu 3+ NFs, Tb 3+ ions play a dual role as both luminescent center and sensitizer by virtue of energy level matching engineering. By adjusting the excitation wavelength and doping concentration of Tb 3+ and Eu 3+ ions, the luminescence color of CSO:RE 3+ (RE = Tb, Tb/Eu) NFs can be regulated, achieving multi-color luminescence from blue to blue-green, green, white, and red. Meanwhile, multiple emission peaks in the emission spectra of the CSO:RE 3+ (RE = Tb, Tb/Eu) enable high information storage and anti-counterfeiting capacity.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Tianshuai Lyu,Pieter Dorenbos,Zhanhua Wei
Developing X-ray charged dosimeters with excellent charge carrier storage capacity and stability is challenging. Such energy storage dosimeters have fascinating use in developing novel applications, for instance, in radiation detection, advanced multimode anti-counterfeiting, and flexible X-ray imaging of curved objects. Herein, novel LiTaO 3 :Ln 3+ ,Eu 3+ (Ln = Tb or Pr) perovskite dosimeters are reported by combining the vacuum referred binding energy (VRBE) diagram of LiTaO 3 and the optimization of dopant’s concentration and compound synthesis condition. Based on the VRBE diagram prediction, charge carrier capturing and de-trapping processes in Eu 3+ and/or Ln 3+ (Ln = Tb or Pr) doped LiTaO 3 will be studied to unravel the role of Eu 3+ as a good electron trapping centre and to discover a record storage phosphor. The ratios of the thermoluminescence intensity of the optimized LiTaO 3 :0.005Tb 3+ ,0.001Eu 3+ to that of the state-of-the-art BaFBr(I):Eu 2+ , Al 2 O 3 :C, or NaLuF 4 :Tb 3+ are 5.2, 8.8, or 2.8, respectively. The charge carriers can be stored more than 1000 h in LiTaO 3 :0.005Tb 3+ ,0.001Eu 3+ . Proof-of-concept anti-counterfeiting application will be demonstrated by combining the colour-tailorable photoluminescence, afterglow, thermally, or optically stimulated luminescence in LiTaO 3 :0.005Tb 3+ ,xEu 3+ and LiTaO 3 :0.005Pr 3+ ,0.001Eu 3+ . Multimode anti-counterfeiting application will be proposed by combining a high absolute X-ray scintillation light yield of 19000 ± 1800 ph/MeV of LiTaO 3 :0.005Tb 3+ ,0.001Eu 3+ . Proof-of-concept flexible X-ray imaging application will be demonstrated by using the optimized LiTaO 3 :0.005Tb 3+ , 0.001Eu 3+ dispersed in a silicone gel film.
✓ 已验证
产品关联
DOI
高影响因子
Bio-Design and Manufacturing
·
2024
·
IF 8.1
Li Zhentao,Song Ting,Jiao Yanpeng,Zhu Zijing,Liao Yang,Liu Zonghua
The low temperature, high salt content, and bacterial composition of a seawater environment can induce severe infections in open wounds, thus impending wound healing. To date, numerous wound dressings have been developed to injuries and various antibacterial functions. However, ordinary antibacterial strategies could not provide long-term resistance to infections and could not promote wound healing. Here, we proposed a strategy for enhancing resistance to seawater immersion wound infection by killing bacteria and delivering bacterial antigens in situ. Specifically, MXene-embedded tannin–Eu 3+ (M@TA–Eu) particles were constructed to effectively alleviate injuries infected through seawater immersion and persistently fight infection by forming in situ bacterial vaccines and immune memory. In the particle, the platform composed of TA and Eu 3+ exhibited provascularization and antigen presentation effects. MXenes with near-infrared photothermal effect were introduced to kill the bacteria, promote the recruitment of antigen presentation cells, and ultimately enhance vaccination efficacy. Experimental results showed that the particles not only effectively accelerated the healing of injuries by relieving wound inflammation and inhibiting bacteria but also produced a potent vaccination by forming in situ bacterial vaccines. Therefore, the M@TA–Eu particles are novel materials for high-grade anti-infection dressing.
✓ 已验证
产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2026
·Vol. 193
·期 1
·60
·
IF 5.3
Yang Yu Zhu,Li Gui Yong,Zhang Pu,Cui Linyun,Liu Huan Li,Chen Shi,Dai Xin
In this study, N-CDs were combined with Eu 3+ to construct a ratiometric fluorescence sensor (N-CDs@Eu 3+ ) for the determination of tetracycline (TC). The nitrogen-doped carbon dots (N-CDs) with good water solubility, excellent fluorescence performance, and high stability successfully prepared by using the leaves of Mahonia fortunei leaf as the carbon source and ethylenediamine as the nitrogen source through a one-step thermal solvent method. In the presence of TC, the fluorescence intensity of N-CDs at 510 nm was quenched due to fluorescence resonance energy transfer (FRET), while the fluorescence intensity of Eu 3+ at 616 nm was significantly enhanced through the antenna effect (AE). This ratiometric fluorescence sensor enables rapid, sensitive and highly selective detection of TC, with a detection limit as low as 7.5 nM. Moreover, a distinct color change from green to red can be observed under a 365 nm UV lamp. With the assistance of a smartphone sensing platform, visual semi-quantitative monitoring of TC was achieved. This method was successfully applied to the detection of TC in milk, pork, and honey, with recoveries ranging from 90.6% to 105.0%. This research demonstrates that this sensor holds potential application value in the field of real-time visualization detection and semi-quantitative determination of TC in biomedical and food safety sensing fields. Graphical abstract
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2025
·
IF 5.1
Jin Liu,Boying Wang,Shuxin Li,Yao Wang,Jun Li,Yan Zhang,Christopher D. Snow,Matt J. Kipper,Soo Wohn Lee,Laurence A. Belfiore,Jianguo Tang
Advanced data storage and anti-counterfeiting technologies are critical in addressing modern information safety. In this work, novel nanocomposites of Eu3+, Tb3+, Zn2+ and -hyaluronan for down-conversion and NaGdF4:Yb,Er nanoparticles for up-conversion have been synthesized and applied for innovative anticounterfeiting luminescent inks. These inks exhibit excellent fluorescence under dual UV or NIR excitation, and sensitive quenching in response to some ions or compounds, enabling multi-level data encoding, reversible Cu2+ detection, and dynamic information concealment. Utilizing electrohydrodynamic (EHD) printing, we achieved precise patterns with line widths of approximately 20–50 μm, facilitating dynamic information concealment and secure data storage. The printed patterns, invisible under natural light, displayed distinct and bright fluorescence when stimulated by UV and NIR light, offering orthogonal readout capabilities for secure information retrieval. Additionally, the luminescent inks demonstrated remarkable sensitivity to Cu2+ ions, with fluorescence quenching efficiency reaching 85.3% at a Cu2+ concentration of 100 μg mL−1. The quenching process was reversible upon introducing ethylenediaminetetraacetic acid (EDTA), enabling up to three cycles of fluorescence recovery and suppression with minor degradation (<15%) in intensity after repeated use. The high-resolution EHD printing technology combined with excellent sensing performance, such as a detection limit of 1.2 μg mL−1 for Cu2+, enables a promising strategy for advancing intelligent information systems and hazardous ion detection. This work offers a versatile solution for secure information coding, anti-counterfeiting, and environmental sensing, providing a significant advancement in multifunctional luminescent materials, especially for smart quadruplicate information coding and hazard sensing, with dual UV/IR excitation.
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Dong Yi,Jiawei Fu,Fenzhong Long,Jin Han,Fangui Meng,Xinmin Zhang
To improve the quality of white LED and develop plant growth lighting, considerable efforts have been devoted to investigating red phosphor. Eu 3+ -activated phosphors are well-known red-emitting components due to their 5 D 0 - 7 F 1,2 transitions in various applications. It is also found that its 5 D 0 - 7 F 4 transition in the range of far-red wavelengths has potential applications in the fields of daily and agricultural lighting. In this study, two kinds of Eu 3+ -doped layered perovskite La 2 Ti 2 O 7 and A 2 La 2 Ti 3 O 10 (A = Li, Na, K) phosphors were synthesized by the solid-state method. The crystal structure, absorption, excitation, and emission spectra of all the samples were investigated in detail. Dissimilar luminescent behaviors of the studied samples were observed. Due to the different crystal structure and chemical composition of the host matrix, each compound exhibits a different emission spectrum. Specifically, Eu 3+ occupies a lower symmetric La 3+ site in A 2 La 2 Ti 3 O 10 (A = Li, Na, K) phosphors, resulting in an intense 5 D 0 - 7 F 4 far-red emission, while in La 2 Ti 2 O 7 :Eu 3+ , Eu 3+ gives a weak 5 D 0 - 7 F 4 emission. To the best of our knowledge, this is the first report that Eu 3+ exhibits a strong 5 D 0 - 7 F 4 far-red emission in the titanate host lattices with perovskite structure. Besides, A 2 La 2 Ti 3 O 10 :Eu 3+ (A = Li, Na, K) phosphors achieve higher photoluminescence efficiency than La 2 Ti 2 O 7 :Eu 3+ . Among them, the internal quantum efficiency of the optimized Li 2 La 2 Ti 3 O 10 :1.2Eu 3+ is about 84.7 %, and it has a better thermal stability (80 % at 125 °C). Furthermore, good photoelectric performances of red/white-LEDs fabricated by utilizing the representative Li 2 La 2 Ti 3 O 10 :1.2Eu 3+ as red/far-red components indicate that it has potential applications in indoor/outdoor lighting and plant growth lighting. This study provides a feasible way for developing efficient Eu 3+ -activated far-red optical materials.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）