Symmetry-Basel
·
2022
·Vol. 14
·期 11
·2293
·
IF 2.94
Fuchong Li,Wei Liu,Yang Gao,Li Tian,Junhong Guo,Jinfeng Cui,Baoping Yang
Organic fluorescent materials are widely applied in different important fields, such as light-emitting display, explosive detection, molecular imprinting, and so on, because of their low cost, easy functionalization, and large-scale fabrication. In this work, we designed and synthesized a new kind of organic fluorescent polysulfate composite material through post-sulfonation sulfur-fluorine exchange polymerization (a new kind of click chemistry) by symmetric molecular. Sulfur-fluorine exchange polymerization: symmetrical structure SO2F−R1−SO2F molecular reacted with symmetrical OH−R2−OH molecular through nucleophilic reaction in the presence of inorganic base. The polysulfate material was further modified by ClSO3H to get PSE−SO3H materials. Tb3+was highly dispersed on PSE−SO3H to afford organic-inorganic hybrid fluorescent materials through the conventional coordination chemistry method. The emission wavelength of the organic-inorganic hybrid fluorescent polymer PSE−SO3H−Tb3+was between 475 and 685 nm, the quantum yield reached 1.18%, and fluorescence lifetime lasted for 730.168 us, with the pure green light emission and long light-emitting lifetime. The fluorescence film was prepared through phase transformation method by the fluorescent polymer material PSE−SO3H−Tb3+. The film has the strong stability property in different pH conditions (pH 1~13). Thus, this kind of organic fluorescent polysulfate composite material may have certain prospects application in terms of detection and luminescence in extreme chemical environments in the future.Keywords:polysulfate material;rare earth matal;Tb3+;fluorescence;polymer;symmetric molecular;stepwise polymerization
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2023
·Vol. 52
·期 36
·12958-12967
·
IF 4
Jiejun Pan,Guang Xu,Sixue Ren,Tingjie Xu,Dongrui Li,Mengxin Liu,Xinan Shi,Daocheng Pan
Rare earth-doped metal oxide thin films exhibit remarkable potential for application in anti-counterfeiting, owing to their exceptional fluorescent properties. However, the existing fabrication techniques for these rare earth-doped luminescent thin films are predominantly complex and necessitate high-temperature conditions. In light of this issue, we present a low-temperature method for in situ fabrication of luminescent Ca1−xMoO4:Eux3+ and Sr1−xMoO4:Tbx3+ nanocrystal thin films by a solution deposition process. The developed method has the advantages of simple operation, rapid and low-temperature synthesis. The optimal chemical compositions of molybdate-based luminescent films are Ca0.90MoO4:Eu0.103+ and Sr0.90MoO4:Tb0.103+. Moreover, we evaluate the practical feasibility of luminescent nanoparticle films in the field of anti-counterfeiting by combining the unique fluorescent properties of rare earth ions and designing customized fluorescent patterns.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DALTON TRANSACTIONS
·
2023
·Vol. 52
·期 37
·13304-13315
·
IF 4
Yuhong Zhang,Bo Sun,Jian Liu,Ziyi Zhang,Hang Liu
A series of Tb3+/Mn4+ co-doped double-perovskite oxides Sr2LuTaO6 (SLT) phosphors are synthesized by a solid-state method. The results of structural characterization prove that the Tb3+ and Mn4+ ions are successfully doped into the SLT host. The photoluminescence excitation (PLE) and photoluminescence (PL) spectra of Sr2LuTaO6:Tb3+, Sr2LuTaO6:Mn4+ and Sr2LuTaO6:Tb3+/Mn4+ are illustrated in detail. Under ultraviolet (UV) excitation, bright green and red lights are obtained from the Sr2LuTaO6:Tb3+/Mn4+ phosphor. In particular, the emission intensity of Tb3+ ions in Sr2LuTaO6:Tb3+/Mn4+ is enhanced by the energy transfer (ET) process from Mn4+ to Tb3+. The thermal enhancement of Tb3+ ion radiation in Sr2LuTaO6:Tb3+/Mn4+ also proves the ET process (Mn4+ → Tb3+). In addition, the thermal enhancement of Tb3+ ion radiation and the thermal quenching of Mn4+ ion radiation in the Sr2LuTaO6:Tb3+/Mn4+ system can be applied to develop optical thermometry based on luminescence intensity ratio (LIR) technology. Therefore, the LIRs of Mn4+ (2Eg → 4A2g) and Tb3+ (5D4 → 7F5,4) are investigated in the temperature range from 313 to 573 K. The absolute sensitivity (Sa) and relative sensitivity (Sr) of the Sr2LuTaO6:Tb3+/Mn4+ phosphor are calculated. The maximum values of Sa and Sr are obtained from the LIR of Tb3+: 5D4 → 7F4 (570–599 nm) and Mn4+: 2Eg → 4A2g (625–705 nm). The maximum Sa is 10.18% K−1 at 543 K, and the maximum value of Sr reaches 1.98% K−1 at 543 K. These results confirm that the ET process from Mn4+ to Tb3+ contributes to increasing the temperature measuring sensitivity of the Sr2LuTaO6:Tb3+/Mn4+ phosphor. Therefore, the Sr2LuTaO6:Mn4+/Tb3+ phosphor has prospective potential in optical thermometry and provides advantageous guidance for designing high-sensitivity optical thermometers.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
LUMINESCENCE
·
2021
·Vol. 37
·期 2
·348-356
·
IF 2.464
Shilin Shen,Zerong Long,Yi Lu,Jia Chen
A novel double-windows fluorescence sensor for carbofuran (CF) detection was successfully developed based on rare-earth Eu,Tb-doped Y 2 O 3 @SiO 2 -based molecularly imprinted nanoparticles (MINs) with a multilayer core-shell structure. The recognition process of the MINs for CF was fairly fast and needed only ~8 min to reach a dynamic equilibrium. Interestingly, one fluorescence attenuation window was found with an increase in CF concentration ( Q ) from 0.1 to 10 μg ml −1 and with a limit of detection (LOD) of 0.04 μg ml −1 at 544 nm belonging to the Tb 3+ emission, as well as another fluorescence enhanced window within the CF concentration range 10–100 μg ml −1 (LOD = 4 μg ml −1 ) at 617 nm of Eu 3+ emission in the dispersed rare-earth-doped MIN colloidal aqueous solution. Luminescence resonance energy transfer from CF to Eu 3+ and an inner filter effect of CF towards Tb 3+ , as well from the two independent detection windows were clearly observed simultaneously. The competition experiment displayed hardly any marked interference during detection of CF following addition of its analogues (carbaryl, isoprocarb, aldicarb, methomyl, and etofenprox). Moreover, the MINs could also be applied to accurately detect CF in rhubarb and wolfberry samples with recoveries of 85.7–92.2%. This sensing system has high specific recognition and a wide detection range for CF and provides new opportunities for pesticide detection.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2024
·
IF 11.2
Zhuo Li,Nan Yang,Shiqin Ding,Ziwang Zhang,Weijie Huang,Zhibin Ye,Meihua Zhao,Jianxin Shi
Inorganic lead-free double perovskites have the advantages of low toxicity, broadband emission, and good stability, which make them promising luminescent materials for lighting applications. However, due to the limited regulation of their self-trapped exciton emission, it is still greatly challenging to achieve white light emitting from a single double perovskite host. Herein, efficient and tunable white light is realized in Cs 2 NaInCl 6 : Sb 3+ , Tb 3+ , Sm 3+ double perovskite by controlling the ratios of the doped three ions with blue, green, and red emissions, respectively. The steady-state and transient fluorescence spectra of singly- and doubly-doped double perovskites reveal the existence of multiple energy transfer channels in the triply-doped phosphors, including from Sb 3+ to Tb 3+ , Sb 3+ to Sm 3+ , and Tb 3+ to Sm 3+ . Benefiting from these channels, the color coordinates of the triply-doped phosphors can cross the whole white light area of the CIE chromaticity diagram by adjusting the ratios of the three dopants , and the maximum internal quantum yield of the white light phosphors is 66.61 %. The white emission phosphors show the characteristic of being independent of excitation wavelength within 310–360 nm. Furthermore, the emission intensity at 430 K of the white light phosphor Cs 2 NaInCl 6 : 0.01Sb 3+ , 0.65Tb 3+ , 0.20Sm 3+ remains 50 % of that at room temperature. A WLED device fabricated with the phosphor and a 365 nm LED chip exhibits a high color rendering index of 90.9, correlated color temperature of 5469 K, and CIE coordinates of (0.333 and 0.328). The results indicate that the as-prepared double perovskite materials are promising candidates in the solid-state lighting field.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Optical Materials
·
2026
·
IF 7.2
Yuying Yang,Zhijun Wang,Junjie Xiong,Juan Zhang,Yuxuan Liang,Guodong Zhang,Hao Suo,Panlai Li
As a carrier for mechanical-to-optical conversion, mechanoluminescent (ML) materials are driving innovations in anti-counterfeiting encryption, self-powered sensing, and human-machine interaction, with their core value lying in the transformation of “invisible mechanical forces” into “visible light.” However, current ML materials face challenges, including weak emission intensity, limited luminescence modes, and the absence of a unified mechanism for force-to-light conversion. Here, a high-intensity green ML phosphor, Ca 2 GeO 4 : Tb 3+ , visible under ambient light, is developed. Following pre-irradiation, excellent photoluminescence (PL) and persistent luminescence (PersL) are observed. Notably, tunable emission from blue to green is achieved in the PL through increasing the Tb 3+ doping concentration, and PersL remained detectable after 1 h, suggesting applicability in delayed bioimaging and advanced anti-counterfeiting systems. Furthermore, it is revealed that the synergy between multiple trap levels and the piezoelectric field generated by lattice distortion induced by Tb 3+ substitution for Ca 2+ is identified as a key contributor to high intensity ML in Ca 2 GeO 4 : Tb 3+ , which is of significant importance for clarifying the force-to-light conversion mechanism. Remarkably, owing to its outstanding luminescent properties, the phosphors are integrated with polydimethylsiloxane (PDMS), demonstrating tremendous potential in multi-modal encryption, dynamic anti-counterfeiting, remote monitoring, and human-machine interaction.
✓ 已验证
产品关联
DOI
高影响因子
SOLAR ENERGY
·
2020
·
IF 4.608
Hanyu Yao,Quntao Tang
To improve energy conversion efficiency ( E ff ) of silicon solar cells, luminescent down-conversion (DC) is an effective approach to adjust solar spectrum by converting ultraviolet light to visible and near-infrared light. In this paper, Tb 3+ - Yb 3+ co-doped NaYF 4 phosphors (DCNPs) were successfully synthesized by a simple solvothermal method. It was confirmed from the strong photoluminescence excitation (PLE) and photoluminescence (PL) emission peaks that the energy transfer occured between Tb 3+ and Yb 3+ ions. The DCNPs were added in the SiO 2 sol-gel to prepare anti-reflection coatings with DC performance, enhancing the visible and near-infrared region transmittance which matched with the band gap of silicon. An optimized short-circuit current density ( J sc ) of 33.39 mA/cm 2 and a relatively enhanced E ff of 6.74% were achieved in the silicon solar cells with the bi-functional film. These results indicated the availability of anti-reflection coating with DCNPs for improving energy conversion efficiency of silicon solar cells.
研究领域:
光伏技术
·
材料科学
·
纳米技术
·
光学涂层
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Sayed Ali Khan,Abdul Jalil,Qudrat Ullah Khan,Rana Muhammad Irfan,Ikhtisham Mehmood,Karim Khan,Maryam Kiani,Binbin Dong,Noor Zamin Khan,Jun-Ling Yu,Ling Zhu,Simeon Agathopoulos
A novel single-phase white-light-emitting YPO 4 phosphor, single and co-doped with Dy 3+ /Eu 3+ , aiming at UV-pumping in white-light-emitting diodes (WLEDs) which exhibits an outstanding optical performance, was successfully produced. The crystal structure, the morphology, the electronic band structure , the electronic configuration, and the bond length of the prepared phosphors were thoroughly investigated, both experimentally and by computational methodology. The results showed that the host lattice provides various surrounding environments to the Eu 3+ activators is a results of Eu 3+ single and Dy 3+ /Eu 3+ co – doped YPO 4 phosphors. Under ultra-violet (UV) excitation (353 nm), the prepared tetragonal phase YPO 4 :Dy 3+ phosphors emitted a bluish-white-light because it has peaks of similar intensity in the blue and the yellow spectral region . The emission spectrum can be tuned from bluish white to green/yellow/red and warm white by adjusting the concentration of Tb 3+ /Eu 3+ dopants . A high photoluminescence quantum yield (PLQYs) 68.55% was achieved. It was observed that the tetragonal YPO 4 :Tb 3+ /Dy 3+ /Eu 3+ phosphors emit-white-light which covers the whole visible region, and have good thermal stability from 20 to 200 °C. Finally, a WLED was fabricated by using a UV LED (365 nm) chip coated with the optimized YPO 4 :Tb 3+ /Dy 3+ /Eu 3+ single-phase phosphor, demonstrating an excellent white-light emission with a high CRI value (R a = 92) and a low CCT value (T c = 2497 K). Hence, the produced material is a promising candidate for UV-pumped single-phase phosphor-converted WLEDs.
研究领域:
材料科学
·
光学工程
·
无机化学
·
固体物理
·
光电子学
·
功能材料
·
照明技术
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2020
·Vol. 8
·期 24
·8171-8182
·
IF 7.059
Jing Wang,Jin Liu,Jing Wang,Yao Wang,Jie Cao,Lin Hou,Ruifen Ge,Jinnan Chi,Linjun Huang,Junlan Guo,Abdur Raheem Aleem,Zhengxing Song,Shree Krishna Tamang,Jixian Liu,Guanghui Wang,Matt J. Kipper,Laurence A. Belfiore,Jianguo Tang
The in vivo trace content of some transition-metal ions is important for biological systems and an inappropriate content may cause diseases. With the purpose of developing an efficient sensing system for Cu2+, this work demonstrates the excellent sensing property of Tb3+/Eu3+-induced polysaccharide aggregates. Photophysical measurements indicate that at a Cu2+ concentration of 20 μM, the fluorescence of Tb3+-induced polysaccharide aggregates (TIPAs) or Eu3+-induced polysaccharide aggregates (EIPAs) can be quenched rapidly and sensitively. Addition of EDTA to chelate Cu2+ restores the fluorescence, indicating that the fluorescence quenching in the presence of Cu2+ is reversible. Initial cytotoxicity experiments with mammalian cells show that the luminescent lanthanide complexes are cytotoxic, but complexing the lanthanides to polysaccharides renders them cytocompatible. These new complexes integrate the advantages of superior lanthanide fluorescence, compatibility with aqueous systems, and cytocompatibility. The microparticle formulation EIPA can be used for applications that require the complexes to be removed from the sample (e.g. by centrifugation), whereas the nanoparticle formulation TIPA is suitable for cell labeling applications with excellent water-solubility, biocompatibility, non-cell toxicity, and cell imaging.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
·
2015
·Vol. 77
·期 1
·152-159
·
IF 1.532
Zhang Qiang,Sheng Ye,Zheng Keyan,Zou Haifeng
Abstract This work focuses on the construction of a series of novel chemically bonded inorganic–organic rare earth hybrid materials using 3,4-bis(pyridin-4-ylmethoxy)benzoic acid as an organic bridge molecule that can both coordinate with rare earth ions and form an inorganic network with titanium isopropylate and aluminum isopropylate after cohydrolysis and copolycondensation through a sol–gel process. Measurements of the properties of these materials show that the terbium systems present high thermal stability and amorphous structure features. UV excitation in the organic component resulted in strong green emission from Tb 3+ ions due to an efficient ligand-to-metal energy-transfer mechanism. Graphical Abstract
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2023
·Vol. 34
·期 10
·1-12
·
IF 2.8
Zhao Jiaqi,Hu Chen,Fang Jiapeng,Sun Ruyi,Lu Jingyao,Su Shikun,Lei Zonghao,Fang Pengfei,Feng He,Degao Zhong,Teng Bing
In this work, a series of iso-structural eulyite-type Ba 3 Yb(PO 4 ) 3 :Tb 3+ solid solution phosphors were synthesized via high-temperature solid-phase method. The corresponding unit cell structure, luminescence properties, thermal stability, and chromaticity coordinates of the as-obtained phosphors were systematically investigated. The crystal structure of Ba 3 Yb(PO 4 ) 3 :Tb 3+ was refined by GSAS program, which indicates the oxygen ions in Ba 3 Yb(PO 4 ) 3 are disordered at one C3 site, and the oxygen atoms are distributed at two sites. Under 378 nm ultraviolet excitation, the emission peak of Ba 3 Yb(PO 4 ) 3 :Tb 3+ appears in the range of 450–650 nm, and a characteristic green emission peak appears at 542 nm. Moreover, the luminous intensity of the Ba 3 Yb(PO 4 ) 3 :14 at.% Tb 3+ sample at 160 °C is 87.7% at room temperature, and the quantum yield is 55.8%, which reveals good thermal stability. Our results suggest that the Ba 3 Yb(PO 4 ) 3 :Tb 3+ phosphors are promising high-efficiency green light conversion materials for UV-LED applications.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Shaokun Ling,Xiaoyan Qin,Chang chen,Kai Meng,Yifeng Yan,Junyun Ming,Sen Liao,Yingheng Huang,Lei Hou
Despite long-term development of LEDs, problems urgent to resolve is still existing. The most outstanding problem to tackle is luminescent stability at high temperature working situation. In this study, a novel type of β-NaYF 4 based phosphor incorporated with Eu 3+ and Tb 3+ is reported. A series of β-NaYF 4 :0.065Eu 3+ , x Tb 3+ ( x = 0.001, 0.002, 0.003, 0.004, 0.005) phosphors were synthesized by hydrothermal method . The sample β-NaYF 4 :0.065Eu 3+ ,0.002Tb 3+ possesses optimal luminescent property at room temperature. The mechanism of energy transfer from Tb 3+ to Eu 3+ ion is quadrupole-quadrupole interactions. The sample β-NaYF 4 :0.065Eu 3+ ,0.002Tb 3+ demonstrates zero thermal quenching (ZTQ) property at 303 K to 383 K. According to XRD and XPS characterizations, nonequivalent replacement between intrinsic ion Na + and Y 3+ were discovered, which finally leads to production of crystal defects. According to electron paramagnetic resonance (EPR) characterization and density functional theory (DFT) calculation, the type of crystal defect of β-NaYF 4 :0.065Eu 3+ ,0.002Tb 3+ is confirmed to be V Y vacancies which are the predominant defect of crystal. The depths and densities of defects were calculated according to data of thermoluminescence spectra (TL spectra). Crystal defects play the role of electrons traps that could store electrons. Electrons stored in traps will be excited to excitation state of Eu 3+ under the thermal stimulation to offset undesirable impact of thermal quenching (TQ), which leads to ZTQ property of the sample β-NaYF 4 :0.065Eu 3+ ,0.002Tb 3+ . The CRI and CCT of fabricated WLED are 3830 K and 84.1, respectively.
✓ 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）