DALTON TRANSACTIONS
·
2024
·Vol. 53
·期 9
·4325-4341
·
IF 3.5
P. J. Xia,X. Z. Zheng,L. Yue,Y. F. Lei,M. Xu,W. B. Dai
For further development of light sources, white light-emitting diodes (wLEDs) have attracted widespread attention as promising next-generation light sources fabricated via the combination of phosphors and LED chips. However, latent defects, such as chemical/thermal instability, low color rendering index (CRI) and high correlated color temperature (CCT), of current mainstream wLEDs seriously hinder their further large-scale implementation. Herein, in order to overcome these limitations, single-phase color-tunable gaudefroyite (Ca3Y(GaO)3(BO3)4 (CYGB)) tridoped with Bi3+/Tb3+/Eu3+ ions was synthesized for the first time and detailed characterisation was performed via high-temperature solid-state reaction and structural/spectral analyses, respectively. Radius difference percentage calculations and Rietveld refinements indicate that dopants occupy both Y3+ and Ca2+ sites but preferably the Y3+ site over the Ca2+ site due to the same valence state. Through subtly regulating the (co)doping contents and skillfully utilizing the energy transfer (ET) strategy from the allowed transition of blue light-emitting Bi to the forbidden transition of green/red light-emitting Tb/Eu, the color hue (including white light) of highly efficient PL can be easily tuned according to the need. Meanwhile, composition/content-optimized white light-emitting CYGB:2%Bi/10%Tb/12%Eu also shows splendid chemical/thermal stability. Finally, as a proof-of-concept experiment, the CYGB:2%Bi/10%Tb/12%Eu phosphor-converted wLED (pc-wLED) was fabricated and encapsulated via the up-to-date remote ‘capping’ method, which imparted attractive performances. Altogether, the stable CYGB:Bi/Tb/Eu phosphor is a promising candidate for application in lighting/display fields.
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高影响因子
Science China-Materials
·
2016
·Vol. 60
·期 1
·68-74
·
IF 0
Wang Di,Wang Ruihong,Liu Liyuan,Qu Yang,Wang Guofeng,Li Yadong
Techniques for detecting glucose are developing at a breathtaking speed because diabetes mellitus can cause many serious complications, such as blindness, high blood pressure heart disease and kidney failure. Herein, water soluble NaYF 4 :Eu 3+ @Ag core-shell nanocrystals for glucose detection with lower detection limit have been successfully developed, using NaYF 4 :Eu 3+ cores as the energy donors and Ag shells as the efficient quenchers through energy transfer. After immobilization of glucose oxidase (GOx) on the surface of NaYF 4 :Eu 3+ @Ag core-shell nanocrystals, the Ag shells can be decomposed in the presence of glucose, accompanied by down-shifting luminescence recovery. The limit of detection of NaYF 4 :Eu 3+ @Ag was 0.12 μmol L −1 . Therefore, the NaYF 4 :Eu 3+ @Ag can be easily extended to the detection of a variety of H 2 O 2 -involved analytes.
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DOI
Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 44
·15706-15719
·
IF 6.4
Fei Xiong,Wen Liu,Zuimin Jiang,Zhu Zhu,Wanbiao Hu
Broadband ultraviolet (UV) excitation and narrow red-emitting phosphors are employed extensively for spectral conversion, yet finding materials with a luminous efficiency high enough for applications is still challenging. Herein, extremely efficient red emission was realized by way of the exciton-assisted energy transfer when the LuNbO4:xEu3+ phosphors were irradiated with UV light in the broadband region of 220–300 nm. When exciting the interband transition with UV light, self-trapped excitons (STEs) were generated and captured by Eu3+ ions to transfer the energy for lighting. The STE behaviors dominating the luminous properties could be optimized by tuning the Eu3+ doping. With increasing the doping levels x, more efficient energy transfer occurred, resulting in enhanced Eu3+ luminescence with the STE emission fading, and the luminescence external quantum efficiency reached an amazing value of 66.8% when x = 0.09. The STE-emission decay curves showed that the energy transfer was realized by exciton transmission from the NbO43− groups to the Eu3+ ions. The Eu3+ doping resulted in more isolated NbO4 tetrahedrons exerting a larger location force on the STEs, and then an orientational host–activator energy transfer occurred, accounting for the efficient light conversion. Since Eu3+ ions could capture more escaping STEs upon thermal stimulus and obtain extra exciting energy to resist the thermal quenching, the red emission also exhibited excellent thermal stability even at 478 K. These results suggest that the exciton-assisted energy transfer could initiate the exploration of new stably efficient red phosphors for applications in light conversion.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2021
·
IF 4.098
Ying Li,Jing Jiang,Qingyi Lv,Bohuai Shao,Chuang Wang,Ge Zhu
The discovery of high color purity red-emitting phosphors is a major challenge for solid-state lighting materials. Benefitting from highly condensed and flexible framework structure of β -Ca 3 (PO 4 ) 2 -type compounds, we have successfully prepared three different kinds of novel high color purity red-emitting phosphors Sr 19 Mg 2 (PO 4 ) 14 : Re 3+ (Re 3+ = Eu 3+ , Sm 3+ , Pr 3+ ) by using traditional sintering method. Rietveld refinement, SEM measurement, absorption spectra, emission/excitation spectra, fluorescence decay analysis and emission spectra in terms of different temperature were investigated and discussed clearly. The matrix optical band gap was calculated to be 4.5 eV by reflection data, which indicated the suitable host for rare earth doping. The single doped Eu 3+ , Sm 3+ and Pr 3+ phosphors could respectively exhibit characteristic and strong red emission peaks at 614 nm, 598 nm and 642 nm when excited by (near) ultraviolet radiation. Excitingly, all samples could obtain high color purity with the value of 91.6%, 90.6% and 84.8% for Eu 3+ , Sm 3+ , Pr 3+ ions, respectively. Moreover, the thermal stability can stay strong which still keep over 75% at 150℃ when comparing with that at atmospheric temperature. The quantum efficiency (QE) is another important parameter for phosphors which were measured to be 46.6% for Eu 3+ , 53.1% for Sm 3+ and 10.3% for Pr 3+ . The present work indicates that the Sr 19 Mg 2 (PO 4 ) 14 : Re 3+ phosphors are efficient red components with extraordinary color purity and high quantum efficiency for industrial applications as solid-state lighting materials.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Xingzhuo Xiong,Zihao Xu,Biao Xu,Chunyu Li,Wubin Dai
Borate-based phosphors have emerged as ideal host materials for near-ultraviolet ( n UV) pumped phosphor-converted white light-emitting diodes (pc- w LEDs) owing to their mild synthesis conditions, broad transparency window, and excellent chemical and thermal stability. Cubic Ba 3 Y 2 B 6 O 15 (BYB) features a highly symmetric lattice structure, providing stable binding sites for rare-earth ions. Its [YO 6 ] octahedral structure allows for controllable lattice distortion, making it an ideal host for multivalent rare-earth luminescent systems. In this study, Ce 3+ , Eu 3+ , Eu 2+ , and Ca 2+ co-doped BYB nanophosphors were prepared in an Ar atmosphere. The partial substitution of Ba 2+ by Ca 2+ promotes the generation of more oxygen vacancies, which in turn induces the self-reduction of Eu 3+ to Eu 2+ . The phosphor exhibits strong absorption characteristics at 365 nm. Acting as an efficient sensitizer, Ce 3+ can simultaneously transfer energy to Eu 2+ and Eu 3+ . By tuning the Ca 2+ content, the Eu 3+ /Eu 2+ ratio and the emission color can be continuously adjusted, achieving a smooth transition from blue-green to orange-red. This Ca 2+ mediated strategy stabilizes the coexistence of Eu 2+ and Eu 3+ , addressing the key limitations of traditional single-phase phosphors. It provides a novel approach for developing high-performance n UV-excited warm white phosphors and demonstrates potential for widespread application in highly efficient pc- w LED devices.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Ningfei Huang,Wei Zhang,Yang Ye,Tao Liu,Wei Xie,Qiuzhi Liang,Jie Lin,Zuyong Feng,Guangting Xiong
Based on the SrLaLiWO 6 matrix, the study satisfactorily synthesized a red phosphor doped with Eu 3+ . Regulation of Ca 2+ doping to control the red-to-blue emission ratio of the phosphor. Analysis of the content and structure of the samples verified the production of high-purity (Sr,Ca)LaLiWO 6 : Eu 3+ phosphor. When blue light at 464 nm excites the phosphor, it emits intense red light. The emission intensity of Eu 3+ ions rose when Ca 2+ was incorporated to the SrLaLiWO 6 matrix. In the meantime, the Sr 0.96 Ca 0.04 La 0.7 LiWO 6 : 0.3Eu 3+ phosphor shows comparatively high quantum efficiency and thermal stability. When the blue light-emitting chip is coupled with the Sr 0.96 Ca 0.04 La 0.7 LiWO 6 : 0.3Eu 3+ phosphor, the emission spectrum produced matches the absorption spectra of plant pigments. Consequently, the prepared sample is an excellent red-emitting phosphor with potential application value.
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CHINESE JOURNAL OF CHEMISTRY
·
2026
·
IF 5.7
Junpu Yang,Kairui Zhang,Shangwei Guo,Wenxuan Yang,Shuode Feng,Yining Zheng,Guobing Yu,Weinan Sun,Peng Lin,Jian Lin
Comprehensive Summary Radiation scintillators that combine high sensitivity, stability, and multimodal detection capability are highly desirable for advanced radiation imaging and monitoring. Herein, we report a rational lanthanide-doping strategy to construct a high-performance metal–organic framework (MOF) scintillator, namely Eu 3+ ⊂Bi-ndc . In this design, high-atomic-number Bi 3+ nodes serve as efficient X-ray absorbers, while Eu 3+ ions act as isolated luminescent activators, and rigid 2,6-naphthalenedicarboxylate (ndc 2– ) ligands function as effective antennae to facilitate energy transfer and suppress non-radiative relaxation. Under X-ray excitation, Eu 3+ ⊂Bi-ndc shows intense radioluminescence with a low detection limit of 2.5 μGy·s –1 , a light yield of 25,695 photons MeV –1 , and outstanding irradiation stability. Flexible scintillating films fabricated from Eu 3+ ⊂Bi-ndc enable high-resolution X-ray imaging with a spatial resolution of approximately 7 lp·mm –1 . Remarkably, Eu 3+ ⊂Bi-ndc also exhibits measurable β-ray–induced scintillation, representing the first example of a lanthanide-containing MOF functioning as a β-ray scintillator. This study advances a synergistic high- Z /lanthanide MOF paradigm that bridges X-ray and β-ray scintillation, paving the way for novel multifunctional radiation detectors.
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高影响因子
ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Shuxin Li,Wenfei Shen,Hao Fu,Yao Wang,Jun Li,Zhonglin Du,Matt J. Kipper,Christopher D. Snow,Laurence A. Belfiore,Soo Wohn Lee,Jianguo Tang
The emergence of convenient blading technology has enabled the development of large-area polymer solar cells (PSCs). However, the smart, efficient enhancement and transparency adaption of bladed PM6:Y6 solar cells requires demonstration of key performance indicators. Herein, we report the enhanced efficiency and adapted transparency of PSCs by binary lanthanide (Eu3+/Sm3+)-induced diblock polymer aggregates (EIPAs/SIPAs) with inclusion of ZnO (ZnO:EIPAs:SIPAs). First, the EIPA- and SIPA-cocapsulated ZnO nanoclusters (ESPAs-Z) were employed as the electron-transport layer (ETL). Owing to their distinct excitation and emission spectra, EIPAs and SIPAs can synergistically boost solar light harvesting and energy conversion. Thus, bladed devices using a PM6:Y6 active layer, with EIPAs and SIPAs in the ETL, have achieved an enhanced power conversion efficiency (PCE) of 13.47% that is notably enhanced by the ratio of 11.4% from 12.03% of the single ZnO ETL. Simultaneously, this ESPAs-Z-in-ETL improves the compatibility between ITO and the active layer and optimizes the energy-level alignment at the interface. In PM6:Y6-based semitransparent polymer solar cells (ST-PSCs), doping EIPAs and SIPAs yielded an optimal PCE of 6.09% while maintaining a high AVT of 39.32%. This work demonstrates that incorporating Eu3+/Sm3+ nanoaggregates into PSCs is a critical advance for the scalable fabrication of ST-PSCs.
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高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Xueqin Liu,Nian Wang,Yu Li,Kang Wang,Xiaomin Fan,Xiang Guo,Xinyong Gong,Ruirui Cui
A conventional high-temperature solid-state reaction was used to synthesize Eu 3+ -doped Ca 3 La 2 (BO 3 ) 4 red phosphors, aiming to overcome the low color rendering index and high correlated color temperature of WLEDs caused by insufficient red spectral components. The XRD patterns indicate that Eu 3+ incorporation does not produce detectable impurity phases, while ionic-radius and charge-balance considerations suggest that Eu 3+ preferentially occupies La 3+ sites. Under 393 nm near-ultraviolet excitation, the samples exhibit intense red emission peaking at 612 nm, attributed to the 5 D 0 → 7 F 2 transition. The optimal doping concentration is 1.3, and concentration quenching is governed by dipole-dipole interactions with a calculated critical distance of 7.19 Å. The internal quantum efficiency reaches 67.21%, and the fluorescence lifetime is 2.64 ms. Thermal stability evaluation shows that at 473 K, the emission intensity retains 70.95% of its room-temperature value, yielding an activation energy of 0.1757 eV. A neutral white LED device was fabricated by encapsulating the optimally synthesized phosphor together with commercial green- and blue-emitting phosphors onto a 365 nm chip, achieving a correlated color temperature of 4767 K and a color rendering index of 91.1. Additionally, anti-counterfeiting ink formulated from this phosphor shows bright red luminescence under UV excitation. Collectively, Ca 3 La 2 (BO 3 ) 4 : Eu 3+ serves as an efficient red phosphor with excellent thermal stability, making it highly promising for solid-state lighting and anti-counterfeiting applications.
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高影响因子
CERAMICS INTERNATIONAL
·
2024
·Vol. 51
·期 5
·6133-6144
·
IF 5.1
Gan Wan,Lei Han,Zongliang Xiao
In the realm of advanced luminescent materials , glass-ceramic (GC) incorporated into rare earth (RE) represents a promising candidate. However, their practical application has been constrained by limitations in luminescence efficiency and thermal stability. This study overcomes these challenges by introducing a novel Eu 3+ -doped black talc GC with enhanced optical characteristics . Our method involved fabricating a new glass matrix and incorporating heavy concentrations of Eu 3+ ions. Following a precise nucleation-crystallization process, CaMgSi 2 O 6 nanoscale crystals were uniformly dispersed within the GCs matrix, markedly enhancing its luminescent properties. When excited by 394 nm light, this GC achieved a notable internal quantum efficiency (IQE) of 88.97 %, surpassing many traditional Eu 3+ -doped glasses and GCs. Furthermore, it retained 89.6 % of its luminescence intensity even at 100 °C, indicating remarkable thermostability. To validate the GC's practical utility, we integrated this material into a white light-emitting diode (W-LED) component, incorporating a LED chip, CaMgSi 2 O 6 : Eu 3+ GC, BaMgAl 10 O 17 : Eu 2+ , and Ba 2 SiO 4 : Eu 2+ phosphor. The fabricated device demonstrated excellent chromaticity coordinates of (0.3493, 0.3935), a correlated color temperature (CCT) of 4976K, and a prominent color rendering index (CRI) of 90.3. This research not only expands the potential applications of black talc, but the prepared GCs also exhibit excellent performance in luminescence properties, highlighting the broad application of this Eu 3+ -doped GCs in W-LED lighting technology.
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高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2026
·
IF 4.8
Qin Xiong,Tiansheng Zhao,Yuyan Liu,Xin Sui,Yanlan Xu,Cheng Wang,Fanglan Liu,Chunhua Xia,Na Li
Accurate discrimination of structurally similar antibiotics remains a major challenge due to the limited resolving capability of conventional sensing signals. Tetracycline antibiotics, which often coexist in complex matrices, typically generate highly overlapping responses, hindering reliable identification. Herein, a dual-emission fluorescence sensing platform based on Eu 3+ -functionalized silver nanoclusters (AgNCs@Eu 3+ ) was developed to generate analyte-dependent signal patterns. Upon interaction with tetracyclines, the green emission of AgNCs is selectively attenuated through the inner filter effect, while the coordination between tetracyclines and Eu 3+ activates a characteristic red emission by the antenna effect. The synergistic modulation of these two signals produces partially overlapping but distinguishable fluorescence fingerprints for different tetracycline species. To resolve these subtle differences, machine learning algorithms were employed to decode the dual-channel fluorescence responses. The optimized model enables accurate classification of tetracycline, oxytetracycline, doxycycline, and chlortetracycline, with an accuracy up to 0.99. The platform further demonstrates robust performance in pharmaceutical, milk, and environmental water samples, maintaining reliable discrimination despite matrix interference. This work establishes a strategy that couples mechanism-defined dual-emission sensing with data-driven analysis, providing a practical route for the identification of structurally similar analytes in complex systems.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Jun Chen,Kai Jiang,Tianxiang Hang,Ciyang Zhang,Ruijie Che,Mingzhu Xia,Wu Lei
A covalently coupled CdTe/NH₂-UiO-66(Eu) ratiometric probe was developed. • Adsorption experiments and IGM analysis indicated rapid glyphosate uptake mediated by multiple interfacial interactions. • Glyphosate enhanced blue emission and weakened green emission for ratiometric readout. • Lifetime, XPS, and TD-DFT analyses provided mechanistic insights into the fluorescence response. Rapid detection and effective adsorptive capture of glyphosate from water are important for aquatic environmental monitoring and agricultural product safety. To address the susceptibility of single-emission fluorescence signals to external fluctuations and the limited glyphosate-capture capability of conventional fluorescent probes, a dual-emission platform integrating glyphosate adsorption with ratiometric fluorescence detection was constructed through the covalent interfacial assembly of Eu 3+ -modified NH 2 -UiO-66 and mercaptopropionic acid-modified CdTe QDs. Adsorption experiments and independent gradient model (IGM) analysis indicated that the composite exhibited rapid glyphosate uptake mediated by multiple interfacial interactions. In the presence of glyphosate, CdTe/NH 2 -UiO-66(Eu) exhibits enhanced blue emission at 434 nm and weakened green emission at 524 nm, producing a pronounced I 434 /I 524 ratiometric response. The fluorescence intensity ratio shows a linear dependence on glyphosate concentration over the range of 0.5–80 μM, with a limit of detection of 0.217 μM. Based on fluorescence lifetime results and XPS analysis, the ratiometric fluorescence response mechanism of the probe was elucidated. TD-DFT calculations further suggested that glyphosate modifies the excited-state charge distribution and charge-transfer characteristics associated with the MOF component. This work provides an interfacial assembly strategy for constructing MOF-based platforms that combine adsorptive glyphosate capture with ratiometric fluorescence sensing. Download: Download high-res image (182KB) Download: Download full-size image
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