JOURNAL OF LUMINESCENCE
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2020
·
IF 3.28
R. Vijayakumar,Balaji Devakumar,Xiaoyong Huang
In this paper, Ce 3+ /Tb 3+ co-doped blue-green emitting Ba 2 Gd 5 B 5 O 17 borate phosphors were prepared for the first time. Phase purity, crystal structure, photoluminescence properties, energy transfer, and thermal stability of the as-synthesized samples were studied in detailed. The Ce 3+ ions singly doped Ba 2 Gd 5 B 5 O 17 :Ce 3+ phosphors had a broad excitation band in the 300–400 nm spectral range peaking at 345 nm, and when excited at 345 nm they exhibited a broad blue emission band in the 350–700 nm wavelength range with a maximum at 450 nm. Energy transfer process from Ce 3+ to Tb 3+ ions took place in the Ce 3+ /Tb 3+ co-doped Ba 2 Gd 5 B 5 O 17 phosphors, resulting in color-tunable emission outputs. It was found that under the excitation of 345 nm, the emission spectra of Ba 2 Gd 5 B 5 O 17 :Ce 3+ ,Tb 3+ phosphors displayed the broad blue emission band of Ce 3+ ions and the characteristic sharp green emission lines of Tb 3+ ions. Moreover, the intensity ratio of Ce 3+ blue emission to Tb 3+ green emission was adjusted by increasing the Tb 3+ doping concentration, and the Ce 3+ →Tb 3+ energy transfer mechanism was studied. Furthermore, the thermal stability of Ba 2 Gd 5 B 5 O 17 :Ce 3+ ,Tb 3+ phosphors was estimated, and the activation energy of Ba 2 Gd 5 B 5 O 17 :0.008Ce 3+ ,0.2 Tb 3+ sample was calculated to be 0.205 eV. The obtained results revealed that blue-green emitting Ba 2 Gd 5 B 5 O 17 :Ce 3+ ,Tb 3+ borate phosphors have potential usage in the fabrication of near-UV based white LEDs.
研究领域:
材料科学
·
光学
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DOI
高影响因子
RSC Advances
·
2019
·Vol. 9
·期 3
·1270-1277
·
IF 3.049
Yufeng Zhang,Jie Xiong,Dingyi Shen,Wenpeng Xia,Jie Yu,Yanfei Zhang,Jun Yang,Shanshan Hu,Yuxin Wan,Haili Wen,Hang Ye,Yucan Liu
A series of color-tunable emitting Na3Sc2(PO4)3:Ce3+/Tb3+/Eu3+ (NSPO) phosphors were prepared by a combination of hydrothermal synthesis and low temperature calcination. The phase structure, photoluminescence and energy transfer properties of the samples were studied in detail. The tunable colors were obtained by co-doping the Tb3+ ions into the NSPO:Ce3+ or NSPO:Eu3+ phosphors with varying concentrations. Under UV excitation, the energy transfers from Tb3+ to Eu3+ in the NSPO host occurred mainly via a dipole–dipole mechanism, and the critical distances of the ion pairs (Rc) was calculated to be 17.94 Å by the quenching concentration method. And that, the emission colors of the NSPO:Tb3+,Eu3+ phosphors could be adjusted from green through yellow to red because of the energy transfer from Tb3+ to Eu3+. Based on its good photoluminescence properties and abundant emission colors, the NSPO:Ce3+/Tb3+/Eu3+ phosphors might be promising as potential candidates for solid-state lighting and display fields.
研究领域:
材料科学
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光学
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DOI
PubMed
高影响因子
TALANTA
·
2021
·
IF 6.057
Chuanyu Yang,Caiyi Du,Ruifang Su,Junyang Wang,Ying Li,Xinyue Ma,Zhihong Li,Chunyan Sun
A fluorescent aptasensor based on sensitized terbium(III) luminescence was constructed to detect melamine in milk. Tb 3+ as the fluorescence probe can be sensitized by a guanine-rich single-stranded DNA sequence, so the complementary sequence of the polythymidine aptamer (cDNA) was modified with six consecutive guanine bases (G6). In the absence of melamine, melamine aptamer combined with cDNA to form a double helix structure, and G6 hybridized with the extended cytosine bases in the aptamer, resulting in low fluorescence intensity of Tb 3+ . In the presence of melamine, cDNA was released due to the specific recognition of melamine to the aptamer, resulting in stronger sensitized fluorescence intensity of Tb 3+ . Under the optimum conditions, the linear concentration of melamine in the milk ranged from 1.0 μg/mL to 10.0 μg/mL. This aptasensor can be used for the accurate and rapid detection of melamine in milk with a detection limit of 0.02 μg/mL, and has the advantages of high sensitivity, high efficiency, simple operation and low cost.
研究领域:
分析化学
·
食品安全
·
生物传感器
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DOI
PubMed
高影响因子
MICROCHIMICA ACTA
·
2023
·Vol. 190
·期 9
·1-11
·
IF 5.7
Liu Yujie,Gao Ran,Liu Xingcen,Zheng Jinhua,Wu Xia
Curcumin (Cur) possesses diverse biological and pharmacologic effects. It is widely used as a food additive and therapeutic medicine. A study to determine a sensitive detection method for Cur is necessary and meaningful. In this work, double rare earth ions co-doped fluorescent coordination polymer nanoparticles (CPNPs) were developed for the Cur detection. The CPNPs were synthesized by using adenosine monophosphate (AMP) as bridge ligands via coordination self-assembly with Ce 3+ and Tb 3+ . The AMP-Ce/Tb CPNPs exhibited the characteristic green fluorescence of Tb 3+ and had high luminescence efficiency. Under the optimal conditions, the fluorescence intensity of AMP-Ce/Tb CPNPs could be significantly quenched by Cur. The fluorescence quenching extent at λ ex / λ em of 300 nm/544 nm showed a good linear relationship with the Cur concentration in the range of 10 to 1000 nM. The detection limit was as low as 8.0 nM ( S/N = 3). This method was successfully applied to the determination of Cur in real samples with satisfactory results. The luminescence mechanism of AMP-Ce/Tb CPNPs and the fluorescence quenching mechanism of the CPNPs by Cur were both examined. Graphical abstract
研究领域:
分析化学
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生物医学
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材料科学
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DOI
PubMed
高影响因子
JOURNAL OF LUMINESCENCE
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2023
·
IF 3.6
Shaolian Sun,Shan Shao,Wuyang Fan,Wenhu Zhang,Fan Xu,Haoming Wei,Bingqiang Cao,Yangqing Wu
The synthesis of efficient nano-scintillators is of great significance for the development of X-ray imaging and other applications. Here, X-ray excited afterglow rare earth nanoparticles β-NaLuF 4 :Gd 3+ /Tb 3+ are investigated. The X-ray-induced luminescence intensity and afterglow duration of NaLuF 4 :Gd 3+ /Tb 3+ nanoparticles are effectively improved by Ca 2+ doping. The optimal luminescence and afterglow performance are achieved when Ca 2+ doping ratio reaches 10%. The change of crystal field symmetry is the main reason for the improvement of luminescence performance. According to the thermoluminescence curve, it is proved that Ca 2+ doping increases the trap concentration and further enhances the afterglow. This study provides the research basis for the application of persistent luminescence materials in biomedical and other fields.
研究领域:
材料科学
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医学影像
·
生物医学工程
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DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2023
·
IF 3.6
Yingzhen Wu,Lin Lin,Zheng Li,Yanan Zhang,Zhuohong Feng,Zhezhe Wang,Zhiqiang Zheng
Up to now, the research field of application of lanthanide ions doped lead-free double perovskite Cs 2 AgInCl 6 nanocrystals (NCs) was relatively limited, even less in temperature sensing. Here, Tb 3+ /Ho 3+ /Bi 3+ ions were successfully doped into Cs 2 AgInCl 6 NCs by hot-injection. The temperature sensing performance of co-doped NCs by using the fluorescence intensity ratio (FIR) was studied through the temperature-dependent emission spectra . By analyzing the influence of ions' doping concentration on temperature sensing performance, the optimal doping concentration of co-doped Cs 2 AgInCl 6 NCs was determined to be 7 % Tb 3+ , 20 % Ho 3+ and 1 % Bi 3+ . The highest absolute and relative sensitivities reach 1.48 K −1 and 2.48 %/K, respectively. We provide a new doping scheme of lead-free double perovskite NCs which have good temperature sensing performance. This co-doped NCs have great potential application value in non-contact temperature sensing in nanoscale .
研究领域:
材料科学
·
光学
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DOI
高影响因子
Journal of Materials Chemistry B
·
2023
·
IF 7
Yinsheng Liu,Mingyue Wang,Yinfei Hui,Lei Sun,Yanrui Hao,Henlong Ren,Hao Guo,Wu Yang
In this study, a rare-earth hybrid luminescent material (lanthanide@COF) was constructed for the detection of a biomarker for anthrax (dipicolinic acid, DPA). JCU-505-COOH was prepared by the hydrolysis of the cyano group in JCU-505 via a post-synthetic modification strategy, then the carboxyl groups in JCU-505-COOH coordinated with Tb3+ ions, similar to pincer vising nut. The prepared Tb3+@JCU-505-COOH exhibited a turn-on response toward DPA, which allowed the lanthanide@COF to serve as a fluorescence sensor with excellent selectivity and high sensitivity (binding constant Ka = 3.66 × 103). The fluorescent probe showed satisfactory performance for the determination of DPA in saliva and urine with a detection limit of 0.6 μM. Moreover, we established a facile point-of-care testing (POCT) using the Tb3+@JCU-505-COOH-based fluorescent test paper together with a smartphone for the initial diagnosis of anthrax. As expected, Tb3+@JCU-505-COOH showed great potential for the rapid screening of anthrax due to low cost, simple operation, and wide applicability.
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PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Shuangyin Zhu,Shilin Jin,Jiamin Chen,Tao Pang,Lingwei Zeng,Lei Lei,Fengluan You,Daqin Chen
Greenlight is a sensitive band of the human eye, improving the luminous quality of the green part is crucial to the performance improvement of LED. However, the application prospects for Tb 3+ are greatly limited by its 4f-4f forbidden transition. In this study, we successfully synthesized Ba 2 MgY 2 (BO 3 ) 3 :Ce 3+ blue phosphor which effectively enhances its luminous properties through energy transfer. By introducing both Ce 3+ and Tb 3+ into the Ba 2 MgY 2 (BO 3 ) 3 matrix, an energy transfer efficiency of 50.6 % is achieved between these two ions, resulting in a remarkable 13.1-fold increase in Tb 3+ luminous intensity. The internal quantum efficiency (IQE) of the sample is measured at 63 %, while the external quantum efficiency (EQE) reaches 30 %. Furthermore, it exhibits good thermal stability and promising applications in temperature sensing due to the sensitivity and coordinated luminescence of Ce 3+ and Tb 3+ ions at different temperatures. Finally, when combined with a 365 nm chip, this sample produces a white LED (WLED) with a color rendering index (CRI) of 81.6 and a correlation color temperature (CCT) of 4330 K.
研究领域:
材料科学
·
光学工程
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DOI
高影响因子
DYES AND PIGMENTS
·
2026
·
IF 3.9
Xiaohan Liu,Yaoshu Cui,Qian Xu,Hong Shao,Dan Li,Yixue Zhong,Xiangting Dong,Ming Zhang
CaLaAl 3 O 7 :Tb 3+ nanofibers and nanoribbons are firstly prepared by electrospinning. • Nanofibers and nanoribbons exhibit excellent fibrous and ribbon like morphology. • Concentration quenching mechanism of phosphors is quadrupole-quadrupole interaction. • Tunable green luminescence is realized by varying Tb 3+ content and morphologies. • Formative mechanism of CaLaAl 3 O 7 :Tb 3+ nanofibers and nanoribbons are advanced. Tb 3+ -doped CaLaAl 3 O 7 one-dimensional nanostructures, including two typical morphologies of nanofibers and nanoribbons, are controllably constructed for the first time through a synergistic strategy combining uniaxial electrospinning technology and a high-temperature oxidation process. The obtained nanofibers possess a tetragonal crystal structure with the space group P-42 1 m. The CaLaAl 3 O 7 :Tb 3+ one-dimensional nanostructures exhibit excellent fiber and belt-like morphologies. Under 236-nm ultraviolet light excitation, the emission peaks at 381, 414, and 438 nm correspond to the 5 D 3 → 7 F 6 , 5 D 3 → 7 F 5 and 5 D 3 → 7 F 4 energy level transitions of Tb 3+ ions, respectively. The emission peaks at 483, 492, 544, 586, 592, and 622 nm correspond to the 5 D 4 → 7 F 6 , 5 D 4 → 7 F 6 , 5 D 4 → 7 F 5 , 5 D 4 → 7 F 4 , 5 D 4 → 7 F 4 and 5 D 4 → 7 F 3 energy level transitions of Tb 3+ ions, respectively. When the Tb 3+ doping concentration reaches 6%, the luminescence intensity of the nanofibers reaches the peak value. Further increasing the doping concentration induces concentration quenching, causing the luminescence intensity to gradually decrease. When the Tb 3+ doping concentration is 6%, the luminescence intensity is maximized, and excellent green light is emitted. The formation mechanisms of CaLaAl 3 O 7 :Tb 3+ nanofibers and nanoribbons are elucidated, the corresponding preparation processes are established, and the concentration quenching mechanism is clarified. The fluorescence properties of the samples can be tuned by adjusting the Tb 3+ doping concentration and the morphology of the samples. The design concept and preparation process not only open up a new path for the controllable synthesis of aluminate-based one-dimensional luminescent materials, but also provide a methodological reference for the construction of other rare earth ion-doped functional nanomaterials. Download: Download high-res image (235KB) Download: Download full-size image
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Ti Feng,Feng Tian,Huangyao Chen,Long Jie Zhang,Jun Zhang,Chaoyong Deng,Ruirui Cui
In the pursuit of environmentally friendly luminescent materials, lead-free double perovskites (LFDPs) have emerged as a promising candidate, distinguished by their unique photophysical characteristics. Concurrently, the development of a single-component phosphor capable of generating stable, full-spectrum white light presents a formidable challenge, standing in contrast to the prevalent multi-phosphor systems used in contemporary white light-emitting diodes (WLEDs). Here, we report the design and synthesis of a triple-doped Cs 2 NaYCl 6 : Sb 3+ , Tb 3+ , Mn 2+ material, achieving single-phase white light emission. In contrast to the pristine Cs 2 NaYCl 6 host, which displays only weak sky-blue luminescence, a remarkable augmentation in the intensity of its self-trapped exciton (STE) emission is observed upon Sb 3+ doping. The enhanced STE-based emission can be primarily attributed to the novel sensitizing state introduced by Sb 3+ doping. The effective STE energy transfer to Tb 3+ and Mn 3+ under Sb 3+ sensitization overcomes the inherent drawbacks of efficiency and color rendition in single-matrix WLEDs. The white light emission can be precisely tuned by simply adjusting the doping ratios. A WLED device was fabricated by integrating the as-synthesized phosphor with a 340 nm UV chip. The device exhibited promising white light performance, yielding a correlated color temperature (CCT) of 5133 K, a color rendering index (CRI) of 92.1, and CIE coordinates of (0.3422, 0.3587), thereby validating its strong potential for practical white lighting applications.
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Fang Fang,Yuanhao Chen,Boyan Liu,Xiaoshan Zhang,Benchun Li,Dawei Zhang,Dechao Yu
Red-emitting phosphors efficiently excited by near-ultraviolet (NUV) light are desired for high-quality phosphor-converted white LED (pc-WLED) devices. In this work, Eu 3+ /Tb 3+ codoped NaBiF 4 phosphors were designed as promising NUV-excitable candidates for the red component in pc-WLEDs. Under 379 and 395 nm excitation, the NaBiF 4 :Eu 3+ ,Tb 3+ samples yield intense red emissions, predominantly at 616 nm due to the 5 D 0 → 7 F 2 transition of the Eu 3+ ion. The Tb 3+ dopants bring in synergistic effects in greatly enhancing the Eu 3+ red luminescence, i.e. resonant energy transfer (ET) from Tb 3+ to Eu 3+ and crystal field perturbation surrounding Eu 3+ . The relevant spectroscopic properties were systematically studied using steady-state and time-resolved fluorescence spectroscopy. The optimized NaBiF 4 :20%Eu 3+ ,15%Tb 3+ sample features a nearly complete Tb 3+ → Eu 3+ ET, leading to a pure Eu 3+ red luminescence, and showing quantum yield values of 44.2% and 51.6% upon 379 and 395 nm excitation, respectively. Notably, the red luminescence from the NaBiF 4 :20%Eu 3+ ,15%Tb 3+ system has a high thermal stability, which at 398 K sustains 80.2% of its room-temperature luminescence intensity under 395 nm excitation. Via coating a mixture of commercial BaMgAl 10 O 17 :Eu 2+ blue- and (Ba,Sr) 2 SiO 4 :Eu 2+ green-emitting phosphors and the optimized phosphor on NUV ∼ 380 and 395 nm LED chips, the homemade 395 nm-excited pc-WLED exhibited interesting warm lighting performance, i.e. color rendering index (Ra) ∼ 90 and correlated color temperature (Tc) ∼ 3884 K, while the 380 nm-excited pc-WLED had Ra ∼88 and Tc ∼ 4685 K. That is, the NUV ∼395 nm chip (illumination also overlapping with the Tb 3+ absorption around 380 nm) is practically preferable to excite the Tb 3+ /Eu 3+ pc-LED for high-qualified warm white lighting. All the results unveil the viable schemes to develop the Eu 3+ /Tb 3+ co-activated red-emitting phosphors, offering promising prospects for novel NUV-excitable pc-WLED light sources.
研究领域:
材料科学
·
光学材料
·
光子学
·
固态照明
·
发光光谱学
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DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2025
·
IF 3.6
Mengke Bai,Wenya Lai,Fei Zhou,Hangqing Xie,Jing Xu,Jiadi Lian,Shiqing Xu
Triplet excitons serve as a critical pathway for harvesting energy released during X-ray interactions with heavy elements; however, strategies to enhance their activation efficiency remain limited. Herein, we report a novel organic doping approach to optimize the triplet radioluminescence (RL) of Tb 3+ /Ga 3+ metallacrown (Tb-1) scintillators. By introducing 1,2,4,5-benzenetetracarboxylic acid (PMA) as a ligand dopant, a new scintillation crystal, Tb-1-PMA, is synthesized. Compared to the Tb-1 crystal, Tb-1-PMA exhibits a significant reduction in metal content while maintaining structural integrity. When excited by ultraviolet light or X-rays, Tb-1-PMA crystal emit bright green light, and the photoluminescence quantum yield (PLQY) is increased from 36.8 % to 45.3 %. The RL intensity of Tb-1-PMA surpasses that of Tb-1 by 50 %, achieving a relative light yield of 17,000 photons MeV −1 , accompanied by nearly eliminated afterglow. These enhancements stem from improved energy-level alignment between organic triplet excitons and Tb 3+ in Tb-1-PMA, enabling efficient energy transfer. The RL intensity demonstrates a linear response to X-ray dose rates, with a detection limit of 0.044 μGy s −1 , approximately 123-fold lower than conventional diagnostic doses. This work provides a cost-effective and scalable strategy for designing organic-doped high-performance triplet-emitting scintillators.
研究领域:
材料科学
·
辐射探测
·
发光材料
·
无机化学
·
核仪器
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）