JOURNAL OF ALLOYS AND COMPOUNDS
·
2017
·
IF 3.133
Huining Huang,Tao Wang,Haifeng Zhou,Dapeng Huang,Yaqiang Wu,Guangjun Zhou,Jifan Hu,Jie Zhan
Novel green-emitting Yb 3+ and Tb 3+ co-doped LaNbO 4 particles were prepared through a facile sol-gel and combustion method. X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), thermogravimetric and differential thermal analysis (TG-DTA), up-conversion luminescence (UCL) with different powers and varied concentrations, and luminescent lifetimes were employed to test the prepared samples. The XRD data exhibit that a sample with high crystallinity can be acquired at 1000 °C. FE-SEM images show homogeneous and spherical grains after Yb 3+ and Tb 3+ are co-doped in the LaNbO 4 samples. TG-DTA reveals that the LaNbO 4 synthetic process is accompanied by a temperature increase. In our work, we utilize a 980 nm laser to excite Yb 3+ ions to achieve the 2 F 7/2 → 2 F 5/2 transition, and the LaNbO 4 :Yb 3+ , Tb 3+ sample exhibits intense green emission. Luminescent spectra at different powers demonstrated the two-photon absorption process; meanwhile, the corresponding energy transfer mechanism from Yb 3+ to Tb 3+ and the emission of Tb 3+ under 980 nm laser excitation was described via an energy level diagram. Moreover, concentration-dependent up-conversion luminescent properties were systematically explored, and it was confirmed that LaNbO 4 :0.15Yb 3+ ,0.02Tb 3+ exhibits the strongest luminescent properties. In particular, as the content of Yb 3+ ions increases, the 5 D 4 → 7 F 6 transition quickly becomes stronger, resulting in the emitted color shifting from green to blue. Therefore, the emitted color can be tuned by adjusting the content of Yb 3+ ions. The excellent up-conversion emission properties of the obtained samples allow for their potential application in the fields of 3D display technologies and solid-state lasers.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2018
·Vol. 10
·期 10
·1099
·
IF 2.935
Qiuping Li
Ionogels refer to an emerging composite material made from the confinement of ionic liquids within some specific cross-linked network matrices. They have potential applications in areas such as electrochemical and optical-electric materials. Incorporation of lanthanide (Eu3+, Tb3+) complexes covalently functionalized multi-walled carbon nanotubes (MWCNTs) in ionogels provide new ideas to design and synthesize novel luminescent hybrid materials that have excellent characteristics of luminescence and ionic conductivity. Here, the multifunctional ionogels were synthesized by confining an ionic liquid and the rare earth functionalized MWCNTs in the cross-linked polymethyl methacrylate (PMMA) networks, resulting in a novel optical/electric multifunctional hybrid material. The SEM images and digital photographs suggest that the lanthanide functionalized MWCNTs are evenly dispersed in the hybrid matrices, thus leading to a certain transparency bulky gel. The resulting ionogels exhibit certain viscosity and flexibility, and display an intense red/green emission under UV-light irradiation. The intrinsic conductibility of the embedded ionic liquids and carbon nanotubes in conjunction with the outstanding photoluminescent properties of lanthanide complexes makes the soft hybrid gels a material with great potential and valuable application in the field of optical-electric materials.Keywords:lanthanide complex;ionic liquid;carbon nanotube;ionogel;composite materials;luminescence
研究领域:
材料科学
·
光学材料
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
International Journal of Applied Ceramic Technology
·
2023
·Vol. 20
·期 6
·3357-3364
·
IF 2.1
Chen Jiang,Rui Zhang,Lidan Han,Yanhui Chen
Persistent luminescence (PersL) phosphors are considered as promising candidates for the next generation of information storage medium. Mg 4 Ga 4 Ge 3 O 16 (MGG) is an electron trapping material which exhibits defect luminescence, and the luminescent properties are easily tuned via doping various activated ions. In this work, undoped and Mn 2+ /Pr 3+ /Tb 3+ single-doped MGG phosphors were synthesized via high temperature solid phase reactions. X-ray diffraction and scanning electron microscope results confirm that the activated ions tend to occupy Mg 2+ sites. Excited at 265 nm, the MGG host exhibits a defect emission band peaked at 450 nm. Red, pink and green emissions are observed in the Mn 2+ /Pr 3+ /Tb 3+ single-doped MGG samples, which are ascribed to the Mn 2+ : 4 T 1 (G) → 6 A 1 (S), Pr 3+ : 1 D 2 → 3 H 4 and Tb 3+ : 5 D 4 → 7 F 5 transitions, respectively. All the samples exhibit bright PersL for minutes after the cessation of excitation. The energy transfer, concentration quenching, luminescence decay and afterglow mechanisms are also discussed in detail. The phosphors exhibit efficient thermal and optical stimuli response, showing great potentials in the optical information storage.
✓ 已验证
产品关联
DOI
高影响因子
LUMINESCENCE
·
2022
·Vol. 37
·期 12
·2018-2027
·
IF 2.613
Guangjin Ou,Hongqing Song,Xinyong Gong,Ruirui Cui,Chaoyong Deng
A new green luminescent phosphor, Li(Y 1- x Tb x )GeO 4 , was prepared using a high-temperature solid-phase method. The X-ray diffraction (XRD) measured spectrum agreed well with the standard card JCPDS No. 02-3479, indicating that it is a quaternary compound belonging to the space group of Pnma(62) with an orthogonal crystalline phase; the excitation and emission spectra measured using the phosphor spectrometer showed that it can be effectively excited by near-ultraviolet light at 378 nm and blue light at 482 nm, and produced excellent strong emission of green light at 550 nm. The afterglow test results show that the sample had a good long afterglow effect at lower doping concentrations; the thermal stability test results showed that its thermal burst activation energy ΔE ≈ 0.37 eV had its excellent thermal stability. The rare earth Tb 3+ -doped green phosphor, LiYGeO 4 :Tb 3+ , has potential applications in household lighting, medical therapy, and optical storage.
✓ 已验证
产品关联
DOI
PubMed
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.
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2022
·
IF 5.436
Dan Zhao,Wen Liu,Ya-Nan Li,Rui-Juan Zhang,Li-Na Zhang
A modulated structure with symmetrical characteristic higher than three-dimensional is a fascinating crystallographic type, and it is randomly encountered by researchers. Herein, we prepared 0.1 mm level single crystals of Na3La(VO4)2 and determined its structure to be a (3 + 1)-dimensional modulated structure using the X-ray diffraction analysis method for single crystals. Its super space group was determined to be Pca21(0β0)000. On the other hand, we introduced Tb3+ into the Na3La(VO4)2 host lattice to fabricate phosphors Na3La1-x(VO4)2:xTb3+ and studied their photoluminescence properties. Interestingly, for the strong absorption of the Na3La(VO4)2 host lattice in the range of 200–400 nm, the traditional 330–385 nm light is unable to efficiently excite Tb3+ ions in the Na3La(VO4)2 host to generate luminescence of Tb3+. Instead, Na3La1–x(VO4)2:xTb3+ is suitable to be excited by 487 nm to generate emitting light at 543, 584, and 622 nm, due to Tb3+ characteristic 4f → 4f transitions of 5D4 → 7FJ (J = 5, 4, 3). Hence, the Tb3+-doped Na3La(VO4)2 phosphors have potential applications for white-light-emitting diodes.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Analytical Methods
·
2021
·Vol. 14
·期 3
·306-311
·
IF 2.896
Song Zhao,Hongbo Jiang,Chengbin Gong,Wenjing Qi,Lianzhe Hu,Yan Zhang
A novel fluorescent sensor based on an asymmetric anthracene derivative (SSAPA) was designed and synthesized. Using this molecule, a rapid and sensitive assay for detecting Tb3+ and ATP in aqueous solutions was established. The SSAPA molecule had excellent aggregation-induced emission (AIE) performance and good aqueous dispersion ability. This molecule could coordinate with Tb3+ and the fluorescence quenched linearly with the increase in the concentration of Tb3+ from 0.005 to 1.2 μM. Since both Tb3+ and adenosine triphosphate (ATP) have strong binding ability, ATP can compete with Tb3+ from the SSAPA/Tb3+ complex leading to fluorescence recovery. In this way, a brand-new fluorescent “turn-on” assay for ATP in the range from 0.01 to 0.4 μM was developed using the Tb3+-based complex probe. The detection limits for Tb3+ and ATP both reached single-digit nanomole per millilitre (2.8 nM and 4.5 nM, respectively), which demonstrated that this method has high sensitivity. Besides, Tb3+ and ATP also could be well detected in other complex environments such as real water samples or serum samples. This study provides a feasible assay for detecting trace amounts of Tb3+ and ATP in aqueous solutions.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2021
·
IF 4.311
Wenting Fan,Fang Zhao,Jiahong Dou,Xuhong Guo
The efficient and scalable synthesis of lanthanide-doped NPs, which exhibit down- and upconversion luminescent properties simultaneously, is still a main challenge that are hindering their adoption. Herein, we employed a facile method, i.e. reactive flash nanoprecipitation, to fabricate dual-mode luminescent lanthanide phosphate (LnPO 4 ) NPs: lanthanum phosphate (LaPO 4 ) co-doped with Tb 3+ and Yb 3+ . The lanthanide source streams and phosphate ion source streams were efficiently mixed in a multi-inlet vortex mixer reactor, and the use of a stabilizer was found to facilitate the formation of uniformly-dispersed LnPO 4 nanocrystals. It is demonstrated that the annealed LnPO 4 NPs exhibited intense down- and upconversion emission under UV and NIR irradiation, respectively. Notably, through adjusting the LnPO 4 to stabilizer mass ratio, the NP diameter could be tuned in a range between 50 and 200 nm, and the composition of LaPO 4 :Tb 3+ ,Yb 3+ NPs could be easily tuned by adjusting the flow rate ratio of the feed streams.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2020
·
IF 3.28
Hui Yu,Xinan Shi,Lijian Huang,Xiaojiao Kang,Daocheng Pan
Eu 3+ /Tb 3+ -doped CaMoO 4 /SrMoO 4 luminescent thin films were deposited by a facile solution method, and were annealed over the temperature range of 350–650 °C. Luminescent thin films were characterized by means of X-ray diffraction (XRD), photoluminescence (PL), UV–vis absorption, scanning electron microscope (SEM) and energy disperse spectroscopy (EDS). In addition, the effects of alkali metal ions (Li + , Na + and K + ) on the luminescence properties of CaMoO 4 /SrMoO 4 thin films were systematically investigated. We found that the optimal chemical compositions for the luminescent molybdate thin films are Ca 0.87 MoO 4 :Eu3+ 0.10, K+ 0.03, Sr 0.82 MoO 4 :Eu3+ 0.15, K+ 0.03, Ca 0.87 MoO 4 :Tb3+ 0.03, Li+ 0.1, and Sr 0.82 MoO 4 :Tb3+ 0.15, Li+ 0.03.
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Chemistry
·
2025
·
IF 6.7
Yuan Wang,DouDou Zhang,Hao song,Xiuxia Yang,Zhichao Liu,Yuankang Wang,Jie Yu,Xu Tian
X-ray scintillators are crucial for medical, industrial, and security imaging systems. However, achieving dual-mode of real-time and delayed imaging within a single matrix still faces challenges. Herein, LiGa 5 O 8 : Tb 3+ was successfully synthesized by the high-temperature solid-phase method. By controlling the atmosphere and optimizing the Li + /Ga 3+ ratio, the trap structure of LiGa 5 O 8 : Tb 3+ spinel phosphors is effectively adjusted, which achieved excellent dual-mode imaging. The air-synthesized Li 1.6 Ga 5 O 8 :4 %Tb 3+ exhibits intense X-ray excited persistent luminescence (X-PersL, 595 nm), while the sample of LiGa 5 O 8 :Tb 3+ reduced in H 2 /N 2 shows enhanced radioluminescence (RL) without X-PersL. This precise manipulation of anti-occupancy defects controls the charge trapping/detrapping dynamics, enabling switchable RL (real-time imaging) and X-PersL (delayed imaging) modes through the single Tb 3+ ions emission. The result resolves the incompatibility between prompt and persistent X-ray responses in conventional scintillators. The defect-regulation method establishes a universal strategy for developing scintillators compatible with complex operational demands, advancing high-performance X-ray imaging technologies.
研究领域:
材料科学
·
生物医学工程
·
影像学
·
辐射探测
·
无机功能材料
✓ 已验证
产品关联
DOI
高影响因子
Advanced Science
·
2026
·
IF 14.1
Songxuan Liu,Ping Zhang,Panpan Li,Yao Ji,Zhiguo Xia,Weichao Wang,Qinyuan Zhang
The development of flexible and wearable radiation detection technology is urgently needed for medical imaging, non-destructive testing, and personal dosimetry. Although bulk single-crystal and ceramic scintillators suffer from intrinsic brittleness and scalability issues, glass scintillators typically show limited light yield. To overcome these challenges, we have developed a Tb 3+ -doped oxyfluoride glass-ceramic scintillator via an integrated approach combining phase-diagram guidance and molecular dynamics simulations. Based on the controlled precipitation of Ba 2 GdF 7 nanocrystals, the as-prepared glass-ceramic scintillator achieves a light yield of 41 800 photons/MeV (418% of BGO). It also achieves a high X-ray imaging spatial resolution of 25.3 lp/mm with large-area scintillating plates and demonstrates exceptional thermal quenching resistance. Leveraging the superior processability of the glass matrix, we further fabricated a flexible scintillation fiber for remote, highly sensitive radiation dosimetry. The fiber sensor exhibits a sensitivity of 224 nGy/s, stability over 240 on-off irradiation cycles, and excellent linearity (R 2 = 0.9999). This work not only presents a robust glass-ceramic scintillator material design strategy but also demonstrates its potential in next-generation distributed radiation detection systems using large-area scintillating plates and flexible glass fibers.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2017
·Vol. 52
·期 10
·5857-5870
·
IF 2.599
Zhao Bei,Shen Dingyi,Tan Qinyue,Tang Jianfeng,Zhou Xianju,Hu Shanshan,Yang Jun
CaF 2 :Ln 3+ (Ln = Ce, Tb, Eu) phosphors with highly uniform shapes have been successfully synthesized by a simple hydrothermal method directly. The as-prepared samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), photoluminescence (PL) and lifetime. The results indicated that the pH values, organic additive and reaction time have a significant effect on the morphology and dimensions of CaF 2 microcrystals and the possible formation mechanism was also proposed. Furthermore, the energy transfer from Ce 3+ to Tb 3+ and from Tb 3+ to Eu 3+ and from Ce 3+ to Tb 3+ to Eu 3+ was observed and the corresponding mechanisms were discussed in detail. The CaF 2 :Ln 3+ phosphors may have potential optical applications in near-UV and violet LEDs.
研究领域:
材料科学
·
无机化学
·
光学材料
·
纳米技术
·
固体化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）