JOURNAL OF LUMINESCENCE
·
2026
·
IF 3.6
Yong Tang,Jianwei Zhao,Yi Li,Yujing Wang,Guangqiu Zhang,Yihang Zhao,Lirong Qin
In this study, we demonstrate a synergistic approach combining hydrothermal synthesis with laser annealing to fabricate Y 2 O 3 : x Eu 3+ phosphors ( x = 0.5, 1, 2, 5, 8, 10 %). When the doping concentration is 5 % Eu 3+ , the photoluminescence performance of the sample is the best, with the maximum emission intensity and a longer lifetime. The phosphor obtained by laser annealing, when excited by a 395 nm laser, emits light with a higher color purity than that obtained by traditional annealing; its thermal stability is also improved. Rietveld refinement confirms laser processing promotes preferential Eu 3+ occupation at low-symmetry C 2 sites, optimizing electric dipole transitions. Meanwhile, both Fourier transform infrared spectroscopy and absorption spectroscopy tests have proved that the performance of the laser-annealed samples is higher than that of the samples annealed in the furnace. In conclusion, laser annealing can be used as a new method for preparing high-performance rare earth luminescent materials.
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高影响因子
Materials
·
2018
·Vol. 11
·期 2
·297
·
IF 2.467
Jiaxi Wang,Li Luo,Baoyu Huang,Jingqi He,Wei Zhang,Weiren Zhao,Jianqing Wang
Novel LiLa1−x−y(MoO4)2:xSm3+,yEu3+(in short: LL1−x−yM:xSm3+,yEu3+) double molybdate red phosphors were synthesized by a solid-state reaction at as low temperature as 610 °C. The optimal doping concentration of Sm3+in LiLa1−x(MoO4)2:xSm3+(LL1−xM:xSm3+) phosphor isx =0.05 and higher concentrations lead to emission quenching by the electric dipole—electric dipole mechanism. In the samples co-doped with Eu3+ions, the absorption spectrum in the near ultraviolet and blue regions became broader and stronger than these of the Sm3+single-doped samples. The efficient energy transfer from Sm3+to Eu3+was found and the energy transfer efficiency was calculated. Under the excitation at 403 nm, the chromaticity coordinates of LL0.95−yM:0.05Sm3+,yEu3+approach to the NTSC standard values (0.670, 0.330) continuously with increasing Eu3+doping concentration. The phosphor exhibits high luminous efficiency under near UV or blue light excitation and remarkable thermal stability. At 150 °C, the integrated emission intensity of the Eu3+remained 85% of the initial intensity at room temperature and the activation energy is calculated to be 0.254 eV. The addition of the LL0.83M:0.05Sm3+,0.12Eu3+red phosphors can improve the color purity and reduce the correlated color temperature of WLED lamps. Hence, LL1−x−yM:xSm3+,yEu3+is a promising WLED red phosphor.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Liandong Guo,Ting Li,Chunchun Zhu,Wenchao Liang,Lina Wu
A series of Bi 3+ or Eu 3+ ion single doped and Bi 3+ and Eu 3+ co-doped CaZnOS phosphors were synthesized via high temperature solid state method. Under ultraviolet (UV) excitation, CaZnOS: Bi 3+ has an intense emission band ranged from 400 to 600 nm owing to the 3 P 1,0 → 1 S 0 transition of Bi 3+ . And CaZnOS: Eu 3+ shows superior red emissions due to the characteristic 5 D 0 → 7 F J ( J = 1, 2, 3, 4) transitions of Eu 3+ . Tunable emission chromaticity from cyan, white, yellow to red is obtained by regulating the proportion of Eu 3+ in CaZnOS Bi 3+ , Eu 3+ . The energy transfer mechanism from Bi 3+ to Eu 3+ was confirmed to be a quadrupole-quadrupole interaction based on the overlap of emission band of Bi 3+ and excitation band of Eu 3+ combined with the luminescent lifetime measurement. In addition, CaZnOS: 2.5 mol% Bi 3+ , 3 mol% Eu 3+ phosphor with optimized concentrations has standard white light chromaticity coordinates (0.315, 0.323) and activation energy about 0.372 eV, which reflects its potential application in ultraviolet-chip excited white light emitting diodes (W-LEDs).
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.3
Xiangyan Yun,Xueping Zang,Haizhe Zhong,Mingjun Chen,Qingqing Cheng,Wei Tao,Heng Li,Zaifa Yang
Developing phosphors with high luminescence efficiency and multifunctional capabilities remains a key challenge for advanced optical applications. Here, we report a red-emitting CaLaLiTeO 6 :Eu 3+ (CLLT:Eu 3+ ) phosphor that exhibits bright and stable 5 D 0 → 7 F J emission, with a peak at 615 nm and color purity up to 99.9 %. Structural and optical analyses confirm that Eu 3+ ions occupy La 3+ sites without disrupting the host lattice. Notably, the phosphor demonstrates distinct temperature-dependent excitation behaviors, enabling single-band ratiometric (SBR) temperature sensing through dual-excitation modulation. The optimized CLLT:15 %Eu 3+ sample achieves high PLQY (62.25 %) and maintains strong emission under elevated temperatures, while the FIR-based SBR models exhibit excellent relative and absolute sensitivities. The strong red emission of CLLT:Eu 3+ further enables applications in plant-growth lighting, anti-counterfeiting, and fingerprint display, demonstrating the versatile functionality of the phosphor. This work provides a feasible strategy to integrate luminescence performance, temperature responsiveness, and multifunctionality in a single phosphor system.
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高影响因子
Materials
·
2026
·Vol. 19
·期 9
·1736
·
IF 3.7
Miao Qiu,Min Zhang,Runnian Han,Yao Wang,Wei Wang,Yanxin Wang,Jun Li,Christopher D Snow,Matt J Kipper,Soo Wohn Lee,Laurence A Belfiore,Jianguo Tang
Highlights A novel Eu 3+ complex-doped protein crystal (EC-PC) fluorescent sensor is developed for detecting metal ions in blood with high efficiency. Co-crystallization conditions are meticulously optimized, achieving uniform doping of Eu 3+ complexes within protein crystals and enhancing fluorescence properties. The sensor exhibits sensitive and selective quenching of fluorescence by biologically relevant cations, demonstrating high sensitivity to copper ions with dose-dependent response. Blood compatibility assays confirm the sensor’s non-hemolytic nature and good anticoagulation properties, ensuring safety for potential biomedical applications. This study not only provides a new application perspective for Eu 3+ complex-doped protein crystals in biosensing but also offers a new strategy for detecting biologically relevant cations in blood, with future potential for clinical sample analysis. This study aimed to develop a novel fluorescent sensor based on Eu 3+ complex-doped protein crystal (EC-PC) for the efficient detection of metal ions in blood. By meticulously controlling the crystallization and annealing conditions in the co-crystallization strategy, the crystal growth processes were optimized to obtain doped Eu 3+ complex-co-protein crystalline (EC-PC) structures. Thus, through co-crystallization of hen egg white lysozyme (HEWL) as a model protein and Eu 3+ complex as fluorescent center, we successfully prepared Eu 3+ complex-doped-HEWL co-crystals (EC-HC) with excellent fluorescent properties. Further treatment with 4% glutaraldehyde cross-linking enhanced the structural stability of the co-crystals. Moreover, the characteristic of sensitive, selective quenching of EC-PC fluorescence by biologically relevant cations, such as Cu 2+ , Zn 2+ , Mg 2+ , Ca 2+ and Fe 3+ ions, set up a smart sensing system in blood. For example, the fluorescence intensity of the crystals at 610 nm, as measured by a UV–visible spectrophotometer, decreases dose-dependently with the concentration of copper ions, thereby validating the sensor’s high sensitivity to copper ion detection. Significantly, we also found that this hybrid protein-based sensor did not induce hemolysis, at various volume concentrations, confirming good anticoagulation in blood. This research not only provides a new perspective on the application of Eu 3+ complex-doped protein crystals in the field of biosensing but also offers a new strategy for the detection of biologically relevant cations in blood. Future work will focus on further optimizing the sensor’s performance and exploring its potential applications in clinical sample analysis.
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PubMed
高影响因子
DALTON TRANSACTIONS
·
2025
·Vol. 54
·期 29
·11162-11173
·
IF 3.3
Fei Wang,Huihui Chen
The development of non-contact temperature sensors has attracted much attention, and high sensitivity is the difficulty to overcome. A new type of red phosphor, Mg2LaSbO6:Eu3+,Mn4+ (MLSO:Eu3+,Mn4+), was synthesized by the solid phase reaction method. The effect of different Eu3+ concentrations on its luminescence was discussed, and its temperature-sensitive properties were studied. The results indicate that Eu3+ and Mn4+ successfully entered the matrix lattice, causing slight distortion of the crystal structure of the phosphor MLSO:Eu3+,Mn4+. The emission spectrum of the phosphor MLSO:Eu3+,Mn4+ consists of sharp emission peaks of Eu3+ (560–640 nm) and broadband emission peaks of Mn4+ (640–800 nm). The experimental results show that the red light emission (612 nm) intensity of Eu3+ and the deep red light emission (695 nm) intensity of Mn4+ in the phosphor MLSO:Eu3+,Mn4+ are temperature dependent. Therefore, using the Fluorescence Intensity Ratio (FIR) technique, temperature fluorescence testing was conducted on the phosphor MLSO:0.02Eu3+,0.002Mn4+ to achieve visible light temperature measurement. The maximum relative sensitivity (Sr) was calculated to be 3.97% K−1 (@440 K), and the maximum sensitivity (Sa) was 0.17 K−1 (@400 K). Meanwhile, the electroluminescence spectra of LED devices prepared using the phosphor MLSO:0.06Eu3+,0.002Mn4+ were consistent with the absorption spectra of chlorophyll (A and B) and photosensitizers (Pr and Pfr) required for plant growth. It shows that the phosphor MLSO:Eu3+,Mn4+ can be used in the field of optical temperature measurement and indoor plant growth lighting.
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PubMed
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2016
·
IF 2.139
Xiangyang Chen,Guangxin Xiang,Fengtao Chai,Zhijun Zhang,Siqi Shi,Fangfang Xu,Jingtai Zhao
Europium-doped Lutetium oxide (Lu 2 O 3 : Eu 3 + ) polycrystalline films have been successfully fabricated on cleaned silicon (100) substrates by routine and alternate spin-coating techniques. X-ray diffraction (XRD), photoluminescence (PL) spectra, field emission electron scanning microscope (FE-SEM) are employed to characterize the as-fabricated films. The SEM observation reveals that the thickness and porosity of the film fabricated by the alternate spin-coating are superior to that by routine spin-coating, i.e. the thickness and porosity increase 95% and reduce 26%, respectively, resulting in 72% enhancement of the emission intensity. According to theoretical calculation and crystallographic analysis, the dominated 5 D 0 - 7 F 2 emission of Eu 3 + can be assigned to the main non-inversion site occupancy.
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高影响因子
OPTIK
·
2022
·
IF 2.84
Zhiyuan Cheng,Tong Liu,Hao Lin,Tian Shi,Zhiqi Ye,Shenghong Yang,Yueli Zhang
Eu 3+ was ideal red emitter due to its efficient red emitting transitions 5 D 0 → 7 F j and Ce 3+ was most common sensitizer due to its strong parity-allowed absorption bands . However, direct sensitization of Ce 3+ on Eu 3+ (SCE) in hexagonal NaYF 4 was very weak and unpractical. In this work, rate equations were introduced to elaborate the details of energy transfer (ET) among Ce 3+ , Gd 3+ and Eu 3+ in NaYF 4 , and how the SCE was much enhanced. The pure hexagonal phase of all samples were guaranteed by powder XRD patterns and SEM images, despite the morphology was influenced by rare earth components. While increasing Eu 3+ concentration over 0.03, SCE was drastically dimished; on the contrary, it could be 60 folds enhanced by tri-doping Gd 3+ ions. The rate equations of sensitizers were established and solved by calculating the lifetimes. It was found out that, while increasing Gd 3+ concentration to 0.4, ET Ce→Gd could compete against ET Ce→Eu to capture 73.8% of energy absorped by Ce 3+ , which strongly favored SCE. The solution also revealed that SCE originated from ET chain Ce→Gd→Eu was much more efficient than direct SCE from ET Ce→Eu, which originated the significant enhancement.
研究领域:
材料科学
·
发光材料
·
稀土掺杂
·
光物理
·
纳米光学
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高影响因子
OPTICAL MATERIALS
·
2023
·
IF 3.9
Haoshuang Fan,Xianguo Meng,Yingchao Xu,Yi Lu,Yue Liu
A series of novel Ca 2-x ScNbO 6 :xEu 3+ double perovskite phosphors were synthesized by high-temperature solid-state reaction technique. The physical phase, micromorphology, photoluminescence properties, concentration and thermal quenching effect of the phosphors were analyzed. Research shows that: Ca 2-x ScNbO 6 :xEu 3+ phosphors can be excited by ultraviolet or Blu-ray LED chips and displays a strong orange-red light luminescence at 614 nm. The sample with optimum doping concentrations has a quantum efficiency of 99.13% at room temperature, and the brightness only decays by 7.49% at 433 K. The sample has excellent thermal stability, with a thermal quenching extinction activation energy of 0.497 eV. Finally, the samples are packaged with 395 nm chips together with green and blue phosphors to obtain white LED, that emits bright white light under forward bias currents and have the advantages of lower correlated color temperature (less than 4390 K) and higher color rendering index (higher than 89). The above results indicate that Eu 3+ ion-doped Ca 2 ScNbO 6 phosphor can be applied to white LED technology.
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高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Fei Wang,Li Li,Chaohui Yang,Zhongxing Cai,Ziyi Guo,Siyu Hou,Xiaoya Xie,Yinghao Chen,Jing Huang,Long Zhang
A series of GdPO 4 :5%Eu 3+ micro/nanomaterials with different morphologies and crystal structures were successfully prepared by the one-step solvothermal method using only the gadolinium source, the phosphoric acid source and ethanol as solvents, without any surfactants or templates, without further calcination and by adjusting only the ratio of phosphoric acid and gadolinium sources. They all have good dispersion and homogeneity. The morphology of the products was mainly regulated by the ratio of H 3 PO 4 to Gd(NO 3 ) 3 · 6H 2 O, with ratios of 2:1, 8:1, 16:1, 24:1, 32:1, 40:1 and 48:1 mL/g resulting in the formation of square, pillow, star, carambola, hollow cylinder, drum and jujube shaped GdPO 4 :5%Eu 3+ micro/nanomaterials, respectively. Ratios of 2:1–24:1 and 32:1–48:1 allow for the direct solvothermal synthesis of monoclinic and hexagonal phase gadolinium phosphate, simultaneously. In addition to their crystal structure and morphology, chemical bonding, thermal stability and specific surface area, their luminescence properties and magnetic resonance imaging (MRI) tracing properties have also been studied in comparison. Interestingly, the GdPO 4 :5%Eu 3+ micro/nanoparticles in the carambola shape had a higher photoluminescence intensity and relaxation rate of 0.7709 mM −1 s −1 (r 1 ) among all the morphologies. The possible mechanisms by which various morphologies of GdPO 4 :5%Eu 3+ were prepared in different ratios were analyzed, and the reasons for their effects on the fluorescence and MRI tracer properties were further investigated. This study is of reference significance for the simple-regulated synthesis of rare earth inorganic gadolinium-containing micro/nanomaterials and provides a reliable guarantee for the expansion of their multifunctional applications in UV–Vis luminescence and MRI tracing for implants.
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JOURNAL OF LUMINESCENCE
·
2022
·
IF 4.171
Renping Cao,Rixing Liang,Lan Li,Ru Liu,Ting Chen,Bang Lan,Youcun Liu,Jing Wang,Chenxing Liao
Bi 3+ , Eu 3+ singly doped and Bi 3+ /Eu 3+ co-doped Ca 9 MgLi(PO) 7 (CMLPO) with a single pure phase are synthesized in air by high-temperature solid-state method and their crystal structure and the luminescence properties are investigated. CMLPO:Bi 3+ with excitation at 313 nm shows blue emission. CMLPO:Eu 3+ with excitation at 318 and 394 nm emits red emission. CMLPO:Eu 3+ , Bi 3+ with excitation at 318 nm shows an adjustable color emission when the ratio between Eu 3+ and Bi 3+ ions is changed. CMLPO:Eu 3+ , Bi 3+ under excitation 394 nm only emits a single red color light. The optimal Eu 3+ concentration in CMLPO:Eu 3+ and Bi 3+ concentration in CMLPO:8 mol%Eu 3+ , Bi 3+ are ∼8 mol% and 2 mol%, respectively. The luminescence intensity of CMLPO:Eu 3+ can be enhanced 1.4–2.2 times when Bi 3+ ion as sensitizer is co-doped into CMLPO:Eu 3+ . The energy transfer process in CMLPO:Eu 3+ , Bi 3+ is observed and analyzed. The luminous mechanisms of samples are explained by using the energy level diagrams of Eu 3+ and Bi 3+ ions. The research in this paper offers effective guidance for the optical property improvement of phosphors by co-doping other ions as sensitizer.
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高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Endian Cui,Xiangyang Yuan,Luomeng Tang,Lu Yang,Xiaoyan Yang,Xiaoling Liao,Jianfeng Tang,Yanan Zhao,Wei Sun,Kai Liu,Yingshuai Liu,Jing Liu
Incorporation of lanthanide ions (Ln 3+ ) can remarkably enhance the structural stability and optical properties of lead-free perovskite NCs. Herein, we have established the relationship between the intrinsic emission of Cs 2 AgInCl 6 host and the Ln 3+ by Eu 3+ , Tb 3+ doping in Cs 2 AgInCl 6 NCs, realizing tunable luminescence of NCs in the visible region. Experimental studies and density functional theory (DFT) calculations analysis show that Eu 3+ and Tb 3+ occupy the sites of In 3+ in Cs 2 AgInCl 6 , the defect formation energy for Cs 2 AgInCl 6 :Ln 3+ is larger than the pristine Cs 2 AgInCl 6 , resulting in a more stable cubic double perovskite structure. The optical band gap increases with the increase in Ln 3+ doping percentage. Turning excitation from 250 nm to 300 nm, the broad self-trapped excitons (STEs) emission is more remarkable, and the narrow Ln 3+ emission is less notable. The emitted color can be adjusted from white to red and to green light by altering the doping concentration of Eu 3+ or Tb 3+ and excitation wavelength. This work promotes the design and optoelectronic application of desired lead-free perovskites.
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高影响因子
危险品化学品经营许可证（带存储）