RARE METALS
·
2020
·Vol. 40
·期 8
·2049-2058
·
IF 2.161
Fu Rong,Hu Yan-Yan,Qiao Hui-Na,Yang Chun-Lin,Yin Hao,Ou Mei-Gui
Gd 2 O 3 :Tb 3+ nanocrystal co-doped with Zn 2+ and Li + was prepared by the combination of polyol and solid-phase methods. The synthesized nanoparticles were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), photoluminescence (PL) spectra and magnetic resonance imaging (MRI). The results revealed that both Gd 2 O 3 :Tb 3+ /Zn 2+ and Gd 2 O 3 :Tb 3+ /Li + had cubic unit structures with a spherical shape, and the fluorescence intensity of the nanoparticles reached a maximum at a doping concentration of 0.050 mmol% for Zn 2+ and 2 mol% for Li + , respectively. In addition, the T 1 / T 2 (longitudinal/transverse relaxation time)-weighted MRI signals got enhanced due to the increased longitudinal relaxivity ( r 1 ) and transverse relaxivity ( r 2 ) after the doping by metal ions. Therefore, the materials reported here can be used for fluorescence and MR bimodal imaging, as tracers and for fluorescence detections. Graphic abstract
研究领域:
材料科学
·
纳米医学
·
生物影像学
·
分子探针
·
生物材料
✓ 已验证
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2019
·
IF 2.781
Xiaojiao Kang,Chuanyu Jia,Hongcheng Wang,Yongshan Xiao,Wei Lü
In this paper, we have synthesized a series of ultraviolet-emitting Ca 9 In(PO 4 ) 7 :Ce 3+ ,Tb 3+ and Ca 9 In(PO 4 ) 7 :Ce 3+ ,Dy 3+ phosphors. The Ca 9 In(PO 4 ) 7 :Ce 3+ phosphor exhibits bright blue emission under UV excitation. The Tb 3+ /Dy 3+ single doped Ca 9 In(PO 4 ) 7 can exhibit weak green and yellow emission, respectively. Based on the efficient energy transfer from Ce 3+ to Tb 3+ /Dy 3+ , the luminous efficiency of Tb 3+ /Dy 3+ in Ca 9 In(PO 4 ) 7 :Ce 3+ ,Tb 3+ and Ca 9 In(PO 4 ) 7 :Ce 3+ ,Dy 3+ can be remarkably promoted. The effects of Ce 3+ /Tb 3+ /Dy 3+ concentration, decay curves, PL emission and excitation spectra on the energy transfer from Ce 3+ to Tb 3+ /Dy 3+ in Ca 9 In(PO 4 ) 7 were investigated. The experimental results demonstrated that the energy transfer efficiency could reach 21.77 and 30.3% in Ca 9 In(PO 4 ) 7 :Ce 3+ ,Tb 3+ and Ca 9 In(PO 4 ) 7 :Ce 3+ ,Dy 3+ , respectively. This study suggests that the synthesized Ca 9 In(PO 4 ) 7 :Ce 3+ ,Tb 3+ and Ca 9 In(PO 4 ) 7 :Ce 3+ ,Dy 3+ compounds have potentials to be used as white light-emitting phosphors in UV light-emitting diodes.
✓ 已验证
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2024
·
IF 5.3
C. Wang,X.Z. Zheng,L. Yue,P.J. Xia,M. Xu,W.B. Dai
The exploration of stable/efficient phosphor for n -UV chip pumped white light-emitting diodes ( w LEDs) remains an arduous task. Herein, a novel series of color tunable Eu 2+ /Tb 3+ /Sm 3+ tridoped Sc-based cyclosilicate phosphors (KBaScSi 3 O 9 : Eu 2+ /Tb 3+ /Sm 3+ ) have successfully designed and obtained via facile solid-state reaction based on comprehensive consideration of rigidly structural network of host, weak electron-phonon coupling strength and spectral adjustability of codopants via energy transfer (ET). The crystallographic occupancies of Eu, Tb and Sm primary in Ba/K, Ba and Ba sites in the monoclinic host, respectively were determined on the basis of the Rietveld refinements and crystal chemistry rules. The photoluminescence (PL) properties were systematically investigated in conjunction with structural analyses, implying that the ‘warm’ white light with excellent thermal stability is stemmed from combination of optimized blue (Eu 2+ ), green (Tb 3+ ) and red (Sm 3+ ) emissions via Eu → Tb → Sm ET strategy. Interestingly, Tb ions play both roles of green light luminescent center and ET bridge to achieve cascade ET for connecting Eu/Sm ion pairs because of the adverse metal-metal charge transfer (MMCT) effect (Eu 2+ + Sm 3+ → Eu 3+ + Sm 2+ ). Furthermore, the phosphor-converted w LEDs (pc- w LEDs), by encapsulating the optimal KBS: 4 %Eu/4 %Tb/6 %Sm with commercial n -UV LED chip, show high thermal stability with satisfactory electroluminescence (EL) performances. These results indicate the KBS: Eu/Tb/Sm phosphors are potential candidates for application in high power n -UV pumped pc- w LEDs.
研究领域:
材料科学
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发光材料
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固态照明
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无机化学
·
光电子学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Ying Lv,Ning Zhao,Chaofeng Li,Cunjian Lin,Shihai You
Efficient and stable persistent phosphors play a crucial role in the fields of energy storage, anti-counterfeiting, and biomedical fields. Here, we present an improved synthetic method for preparing a series of color-tunable LiYGeO 4 :Tb 3+ persistent phosphor. The increased Tb 3+ concentration in the improved method enhances the persistent luminescent intensity at 20 s by ∼2.96 times. This enhancement is due to the dual roles of Tb 3+ as both emitters and trap centers within LiYGeO 4 . By simply increasing the doping concentrations, the persistent color can be adjusted from blue to green. LiYGeO 4 :Tb 3+ exhibits no loss of persistent luminescent intensity even after exposure to water at 80 °C for 72 h, surpassing the commercial green persistent phosphor. Furthermore, information storage was successful demonstrated by using LiYGeO 4 :Tb 3+ with various doping concentrations. This study represents a significant advancement in optimizing the properties of persistent luminescent materials, where dopants simultaneously serve as emitters and trap centers.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2020
·
IF 5.278
Linli Hou,Yonghai Song,Fengxiang Lang,Zhenrong Wang,Li Wang
A luminescent Tb 3+ -pyromellitic acid (H 4 L = pyromellitic acid) coordination polymer (Tb-H 4 L CP, TbL 0.5 (H 2 L) 0.5 (H 2 O)·DMF) was prepared for multiresponsive fluorescence sensor. The Tb-H 4 L CP exhibits uniform nanospheres with average diameter of 220 ± 20 nm, good crystalline structure, and good dispersion in water. The Tb-H 4 L CP emitted the characteristic green fluorescence through antenna effect from H 4 L which was an excellent antenna molecule when excited at 270 nm and could be used to selectively determine Fe 3+ and polychlorinated benzenes based on fluorescence quenching effect. The coordination between Fe 3+ and carboxylic oxygen of Tb-H 4 L to damage the antenna effect and polychlorinated benzenes absorb the excitation light to result the inner-filter effect of fluorescence, which quenched the fluorescence of Tb-H 4 L CP. The linear range for Fe 3+ was 2.0–100 μM with a detection limit of 0.7 μM and for 1,3,5-trichlorobenzene was 0–0.44 × 10 3 ppm with a detection limit of 0.087 ppm. The Tb-H 4 L CP demonstrates excellent fluorescence sensing performances, indicating that it can be used as a multi-response sensor to effectively measure toxic and harmful substances.
研究领域:
化学
·
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2026
·
IF 3.2
Longjie Zhang,Chonghui Qi,Huangyao Chen,Xiang Guo,Ruirui Cui
Lead-free double perovskites (LFDPs) have attracted substantial research interest owing to their unique photoluminescence characteristics, low toxicity, and structural versatility. However, achieving efficient single-lattice white-light emission remains a formidable challenge due to the intrinsic difficulty of spectral tuning and the trade-off between luminescence efficiency and color quality in single-host systems. To address this issue, we developed a triple-doped rare-earth double perovskite system Cs 2 NaScCl 6 : Sb 3+ , Tb 3+ , Sm 3+ . Through a competitive energy transfer design, we achieved fine control over energy migration from Sb 3+ to Tb 3+ and Sm 3+ , enabling precise spectral modulation simply by adjusting the dopant concentrations. Steady-state and time-resolved photoluminescence (PL) spectroscopy clearly identified three energy transfer routes: Sb 3+ → Tb 3+ , Sb 3+ → Sm 3+ , and Tb 3+ → Sm 3+ , which collectively contribute to the tunable white-light emission. The optimized material exhibits outstanding thermal stability, retaining 88.1% of its initial emission intensity at 473 K. The Cs 2 NaScCl 6 : 1%Sb 3+ , 40%Tb 3+ , 8%Sm 3+ single crystal achieves a photoluminescence quantum yield (PLQY) of 40.90%. When fabricated into WLED devices, this phosphor delivers a color rendering index (CRI) of 85.1, a correlated color temperature (CCT) of 4278 K, and near-ideal CIE coordinates of (0.336, 0.306). Collectively, this work not only presents a high-performance single-host white-light emitter for solid-state lighting applications, but also offers a viable energy transfer design strategy for rare-earth-activated LFDPs, thereby advancing the development of eco-friendly perovskite materials for white-light-emitting devices.
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2024
·
IF 5.3
Chenglin Gong,Lin Lin,Yingzhen Wu,Yanan Zhang,Zhuohong Feng,Zhezhe Wang,Yantang Huang,Zhiqiang Zheng
In this research, double perovskite quantum dots Cs 2 AgInCl 6 : Tb 3+ /Sm 3+ /Bi 3+ are synthesized employing a high-temperature thermal injection method. The temperature-dependent emission spectra and the fluorescence decay curves of samples show the quantum dots can be applied to dual-mode temperature sensing employing fluorescence intensity ratio technique (between 656 nm (Sm 3+ ) and 549 nm (Tb 3+ )) and fluorescence lifetime thermometry (549 nm (Tb 3+ )), achieving maximal relative sensitivities of 3.24%/K (351 K) and 0.68%/K (373 K), respectively. This study offers valuable insights into the temperature sensing capabilities of these quantum dots, which shows that these quantum dots are promising high-sensitivity dual-mode temperature sensing materials.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
MOLECULES
·
2024
·Vol. 29
·期 24
·5887
·
IF 4.2
Jiaxiang Liu,Yongwen Zhang,Ruijuan Yao,Haitao Ren,Weijie Wang,Haohao Feng,Wentao Li,Zongcheng Miao
Achieving superior circularly polarized luminescence brightness (BCPL) is an important subject and continuous challenge for chiroptical materials. Herein, by applying a binary molecular design for the synthesis of chiral organo-Tb3+molecules, a novel pair of mononuclear chiraltris-pyrazolate-Tb3+enantiomers, [Tb(PMIP)3(R,R-Ph-PyBox)] (2) and [Tb(PMIP)3(S,S-Ph-PyBox)] (5), have been synthesized and characterized. The three 1-phenyl-3-methyl-4-(isobutyryl)-5-pyrazolone (HPMIP) ligands play the role of efficient luminescence sensitizers and strong light-harvesting antennas, while the enantiopure 2,6-bis(4-phenyl-2-oxazolin-2-yl) pyridine ligand (R,R/S,S-Ph-PyBox) is employed as the strong point-chiral inducer. With the proper combination of theHPMIPandChiral-Ph-PyBoxwithin the Tb3+enantiomers, strong (PMIP)−-centered π-π*electronic absorption (ε263 nm= 38,400–39,500 M−1cm−1) and brilliant high-purity ligand-sensitized Tb3+-centered green luminescence (ΦPL= 47–48%) were observed. In addition, a clear circularly polarized luminescence (CPL) activity (|glum| = 0.096–0.103) was also observed, resulting in a strongBCPL(610–623 M−1cm−1) for the two Tb3+enantiomers from the hypersensitive transitions. Our results offer an effective path to develop high-performance chiroptical organo-Tb3+luminophores.
研究领域:
化学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Yingfei Hui,Hao Guo,Yinsheng Liu,Mingyue Wang,Lei Sun,Liping Peng,Borong Ren,Zhiguo Yu,Wu Yang
Covalent organic frameworks (COFs) with full π-conjugation can be obtained by tuning the building blocks and covalent bonds. Meanwhile, lanthanide ions (Ln 3+ ) have attracted attention for their unique luminescent properties. In this study, we coordinated Tb ions with COF (TQBQ-COF), thereby constructing a fluorescent sensor for the detection of 2,6-pyridinedicarboxylic acid (DPA) as an anthrax biomarker. The prepared Tb 3+ @TQBQ-COF shows an ultra-low detection limit for DPA (3.58 nM), which is much lower than the required level of DPA for Bacillus anthracis to produce anthrax (60 μM). In addition, the prepared sensors showed good detection performance in detecting anionic pollutants when DPA was used as a photosensitizer. Our work provides a simple method for the detection of DPA.
研究领域:
化学
·
生物传感
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
POLYHEDRON
·
2025
·
IF 2.6
Qian Du,Chang-Sheng Wang,Yu-Guo Yang,Wei Zhao,Xiao-Na Shen,Bing Liu,Yuan-Yuan Zhang,Hua-Di Zhang,Hua-Jian Yu,Cheng-Cheng Qiu,Xian-Shun Lv,Rui Zhang,Xu-Ping Wang
Some Tb 3+ /Eu 3+ doped SrGdGa 3 O 7 (SGGO) phosphors were fabricated, achieving multi-color tunability through the addition of a sensitizer. The experimental results indicate that the doped ions are uniformly distributed, with no impurity phases detected. In SGGO-based phosphors, Eu 3+ ions serve as activators and exhibit an optimal luminescence transition level of 5 D 0 → 7 F 4 . When Tb 3+ ions are used as the sensitizer and at a specific concentration, the luminescence color transition of green → orange → red as the content of Eu 3+ enhances. Analysis of the decay lifetime curves reveals that Tb 3+ → Eu 3+ energy transfers occur in the co-doped SGGO phosphors, with the mechanism identified as quadrupole–quadrupole interaction. This article investigates the specific energy transfer processes involved. The optimum content of Eu 3+ is ascertained as 0.03. Under the excitation at 375 nm, the SGGO based phosphor containing 0.06 Tb 3+ and 0.03 Eu 3+ exhibits CIE coordinates of (0.5000, 0.4397).
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
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.
研究领域:
材料科学
·
纳米技术
·
光学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF NON-CRYSTALLINE SOLIDS
·
2015
·
IF 1.766
Yuebo Hu,Renjun Dou,Jianbei Qiu
Upon excitation with a 980 nm laser diode (LD), the upconversion luminescence (UCL) properties of Tb 3 + /Ho 3 + /Yb 3 + tri-doped oxyfluoride silicate glasses were investigated. Five distinct emissions peaked at 489, 543, 584, 623 and 662 nm are simultaneously observed and are assigned to the electronic transitions of Tb 3 + : 5 D 4 → 7 F J (J = 6, 5, 4 and 3) and Ho 3 + : 5 F 5 → 5 I 8 , respectively. The effects of Tb 3 + and Yb 3 + concentrations on the emissions were studied. The log–log plots of the UCL intensity versus laser power show abnormal relations: the slopes are larger than those in previous reports, which could be attributed to the effect of intrinsic optical bistability (IOB) of Yb 3 + ions. In addition, the UC mechanisms were discussed in this work.
研究领域:
材料科学
·
光学
✓ 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）