CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Liuhan Yi,Ruoyu Fu,Feng Zhang,Zheng Wei,Man Zhang
The anomalous luminescence thermal quenching performance caused by negative thermal expansion has attracted much attention due to the potential application in optical fields . However, the downshifting emissions with abnormal thermal quenching achieved by isotropic negative thermal expansion for optical temperature sensing applications are still lacking. Herein, a large enhancement of red emission and a high temperature sensing performance are realized by isotropic negative thermal expansion in ScF 3 :Tb 3+ /Eu 3+ phosphors ceramics. Specially, a selectively thermal enhanced red emission of Eu 3+ from 5 D 0 → 7 F 2 with hypersensitive transition characteristics could be obtained due to the thermal stimulated lattice distortion . Attributing to the shortening of cation spacing, the energy transfer efficiency between Tb 3+ and Eu 3+ is largely enhanced with the increasing of the temperature from 303 to 473 K. The enhanced energy transfer leads to that the emission of Tb 3+ firstly increases and then slightly decreases, whereas the emission from Eu 3+ has been largely improved. Finally, an optical temperature sensing strategy based on the fluorescence intensity ratio of the sensitizer Tb 3+ (signal ions) and the activator Eu 3+ (referring ions) is designed, attributing to the distinguishable luminescence response to the temperature. The obtained maximum relative sensitivity is 1.04 % K −1 (@303 K). Besides, the sensing strategy based on lifetime mode also suggests a maximum relative sensitivity of 1.00 % K −1 at 343 K. It provides a feasible strategy to obtain an optical temperature sensing material with high emission efficiency at a high temperature, which sheds light on the design of luminescence materials keeping high luminescence stability in a wide temperature range in the fields of optical temperature sensing.
研究领域:
材料科学
·
光学
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产品关联
DOI
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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产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2019
·
IF 2.961
Lin Lin,Zhipeng Yu,Zhezhe Wang,Zhuohong Feng,Feng Huang,Lili Huang,Qionghua Dai,Fengfen Zhang,Zhiqiang Zheng
Au@SiO 2 /NaYF 4 :Tb 3+ ,Yb 3+ @NaYF 4 nanocomposites are acquired by combining Au@SiO 2 nanorods with ligand-free NaYF 4 :Tb 3+ ,Yb 3+ @NaYF 4 nano-particles in water solution due to the electrostatic attraction. Plasmon-enhanced upconversion (UC) and quantum-cutting (QC) are both obtained and optimized in these nanocomposites by adjusting SiO 2 shell thickness and concentrations of Au@SiO 2 . While the thickness of SiO 2 shell is 35 nm, the enhancement factor of UC and QC reaches maximum as 1.91 and 3.47 times, respectively. The nanocomposites may be applied in biological fluorescence label, super-resolution imaging and solar cells, etc.
研究领域:
纳米技术
·
光学
·
材料科学
·
生物医学工程
✓ 已验证
DOI
高影响因子
TALANTA
·
2018
·
IF 4.244
Zi-Han Chen,Xin-Yue Han,Ling-Xue Deng,Zi-Yang Lin,Fang-Ya Mu,Shengqiang Zhang,Guoyue Shi,Min Zhang
Tb 3+ -doped carbon dots (Tb 3+ @CDs) were prepared in a facile hydrothermal method by using ammonium citrate as carbon source and Tb 3+ as dopant. A 15-bp GT-rich single-strand DNA (ssDNA) was introduced to sensitize Tb 3+ via the antenna effect for generating two fluorescence signals (CDs and Tb 3+ ), forming a conjugate of Tb 3+ @CDs/ssDNA. The ratiometric fluorescence of Tb 3+ @CDs/ssDNA could be reversibly regulated by Ag + and Cys, in which the fluorescence peak at 546 nm of Tb 3+ could be switched to “On” or “Off” as the signal indicator while the fluorescence peak at 444 nm of CDs remained constant as the build-in reference. The proposed Ag + /Cys-mediated reversible fluorescence changes in Tb 3+ @CDs/ssDNA was also proven for the design of a self-calibrating ratiometric fluorescence logic system. By integrated with the specific reaction between H 2 O 2 and Cys, Tb 3+ @CDs/ssDNA was applied for ratiometric fluorescence detection of H 2 O 2 . More importantly, the sensing strategy could be further successfully extended to the monitoring of H 2 O 2 -produced oxidase-related reactions, such as GOx-biocatalyzed oxidation of glucose (the limit of detection: 0.06 μM) and was well applied in rat serum compared to commercial kits. This work unveiled a novel ratiometric fluorescent design, which is cost-effective, simple to prepare and easy-to-use without chemical modification or fluorescence labeling .
研究领域:
生物化学
·
分析化学
·
生物传感
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产品关联
DOI
PubMed
高影响因子
Materials Science & Engineering C-Materials for Biological Applications
·
2019
·
IF 4.959
Fengjie Deng,Huajian Zhou,Junyu Chen,Hongye Huang,Jianwen Tian,Qiang Huang,Yuanqing Wen,Meiying Liu,Xiaoyong Zhang,Yen Wei
The preparation of fluorescent inorganic-organic polymer composites for biomedical applications has become one of the most interest research focuses recently. In this work, we reported a novel method for the preparation of Tb 3+ -doped luminescent layered double hydroxides (LDHs) based composites by taken advantage of a one-pot supramolecular chemistry. The adamantane can be immobilized on the surface of Tb 3+ -doped LDHs to obtain LDH-Ad, which could be further utilized for modified by the β-cyclodextrin (β-CD) containing hyperbranched polyglycerols (β-CD-HPG) through the host-guest interaction. Based on the characterization results, we demonstrated that the hyperbranched polyglycerol could be facilely introduced on these fluorescent Tb 3+ -doped LDHs through the method described in this work. The obtained Tb 3+ -doped LDHs based polymer composites (LDHs-β-CD-HPG) display improved water dispersibility and still maintain their fluorescence. The results based on various biological assays suggest that LDHs-β-CD-HPG polymer composites are of low cytotoxicity and their cell uptake behavior can be effectively traced using confocal laser imaging. All of the above results demonstrated that the fluorescent Tb 3+ -doped LDHs based polymer composites could be effectively surface modified with hydrophilic hyperbranched polymers through a one-pot facile host-guest interaction and the resultant fluorescent composites are of excellent physicochemical properties and display great potential for biomedical applications. This novel surface modification method should also be important for fabrication of other multifunctional composites and therefore great advanced the development of biomedical applications of fluorescent LDHs based polymer composites and related materials.
研究领域:
材料科学
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生物医学工程
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纳米医学
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产品关联
DOI
PubMed
高影响因子
Nanomaterials
·
2023
·Vol. 13
·期 3
·549
·
IF 5.3
Yang Yu,Wei Zhou,Cheng Li,Peigeng Han,Hui Li,Kun Zhao
Lead halide perovskites have achieved remarkable success in various photovoltaic and optoelectronic applications, especially solar cells and light-emitting diodes (LEDs). Despite the significant advances of lead halide perovskites, lead toxicity and insufficient stability limit their commercialization. Lead-free double perovskites (DPs) are potential materials to address these issues because of their non-toxicity and high stability. By doping DP nanocrystals (NCs) with lanthanide ions (Ln3+), it is possible to make them more stable and impart their optical properties. In this work, a variable temperature hot injection method is used to synthesize lead-free Tb3+-doped Cs2NaInCl6DP NCs, which exhibit a major narrow green photoluminescence (PL) peak at 544 nm derived from the transition of Tb3+ 5D4→7F5. With further Bi3+co-doping, the Tb3+-Bi3+-co-doped Cs2NaInCl6DP NCs are not only directly excited at 280 nm but are also excited at 310 nm and 342 nm. The latter have a higher PL intensity because partial Tb3+ions are excited through more efficient energy transfer channels from the Bi3+to the Tb3+ions. The investigation of the underlying mechanism between the intrinsic emission of Cs2NaInCl6NCs and the narrow green PL caused by lanthanide ion doping in this paper will facilitate the development of lead-free halide perovskite NCs.Keywords:lead-free double perovskite;lanthanide ion doping;Cs2NaInCl6;nanocrystals
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROELECTRONICS RELIABILITY
·
2023
·
IF 1.6
Meiling Xie,Minghao Fang,Zhaohui Huang,Yan'gai Liu,Xiaowen Wu,Xin Min
Na 3 Gd(PO 4 ) 2 phosphors doped with rare-earth metal ions Ce 3+ and Tb 3+ were fabricated by the solid-state reaction method. Under the excitation of 340 nm light, the Ce 3+ -doped Na 3 Gd(PO 4 ) 2 phosphors exhibit a broad emission band ranging from 370 nm to 480 nm, which emitted blue light centered at 405 nm. When excited at 373 nm, the Tb 3+ -doped Na 3 Gd(PO 4 ) 2 phosphors presented a green light emission, including a strong peak located at 547 nm. In addition, both of the Na 3 Gd(PO 4 ) 2 : Ce 3+ and Na 3 Gd(PO 4 ) 2 : Tb 3+ phosphors showed excellent thermal stability at different temperatures, be specific in the Na 3 Gd(PO 4 ) 2 : Ce 3+ emission intensities at 150 °C could maintain about 84 % and the Na 3 Gd(PO 4 ) 2 : Tb 3+ could maintain about 92.9 % of those at room temperature. A prototype of the white light-emitting diodes lamp exhibiting bright white light was fabricated by using a 365 nm near-ultraviolet-emitting LED chip, combined with Na 3 Gd(PO 4 ) 2 : Ce 3+ blue phosphors, Na 3 Gd(PO 4 ) 2 : Tb 3+ green phosphors, and Na 3 Gd(PO 4 ) 2 : Eu 3+ red phosphors , which produced a high color rendering index of 89.4, and a relatively low correlated color temperature of 5496 K. Moreover, the CIE point was calculated to be at (0.3332, 0.3438), locating in the white light region. These results indicate that the as-prepared phosphors can be considered as potential candidates for ultraviolet/near-ultraviolet light-excited white light-emitting diodes applications.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
Crystals
·
2022
·Vol. 12
·期 7
·963
·
IF 2.67
Weili Wang,Shihai Miao,Dongxun Chen,Yanjie Liang
Trivalent lanthanides (Ln3+) doped bismuth-based inorganic compounds have attracted considerable interest as promising candidates for next-generation inorganic luminescent materials. Here, a series of K0.3Bi0.7F2.4(KBF) nanocrystalline particles with controlled morphology have been synthesized through a low-temperature aqueous-phase precipitation method. Using KBF as the host matrix, Eu3+, Tb3+, Pr3+, Nd3+, Sm3+,and Dy3+ions are introduced to obtain K0.3Bi0.7F2.4:Ln3+(KBF:Ln) nanophosphors. The as-prepared KBF:Ln nanophosphors exhibit commendable photoluminescence properties, in which multicolor emissions in a single host lattice can be obtained by doping different Ln3+ions when excited by ultraviolet light. Moreover, the morphology and photoluminescence performance of these nanophosphors remain unchanged under different soaking times in water, showing good stability in a humid environment. The proposed simple and rapid synthesis route, low-cost and nontoxic bismuth-based host matrix, and tunable luminescent colors will lead the way to access these KBF:Ln nanophosphors for appealing applications such as white LEDs and optical thermometry.
研究领域:
材料科学
·
纳米技术
·
光学
·
化学
✓ 已验证
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2018
·
IF 6.042
Baoxia Liu,Haoshuang Shen,Yuanqiang Hao,Xu Zhu,Suzhi Li,Yankai Huang,Peng Qu,Maotian Xu
Metal–organic coordination polymers (MOCPs) have been emerging as very attractive nanomaterials due to their tunable nature and diverse applications. Herein, using Tb3+ as the luminescence center, 1,3,5-benzenetricarboxylate (BTC) as building block and Cu2+ as the signal modulator as well as a recognition unit, we propose a novel and effective lanthanide functionalized MOCP (LMOCP) fluorescent sensor (Cu-BTC/Tb) for amyloid β-peptide (Aβ) monomer, a biomarker for Alzheimer disease (AD). Specifically, Cu-BTC/Tb, created by postsynthesis modification strategy under room temperature, is almost nonemissive due to the quenching effect of Cu2+ in the MOCP, exhilaratingly, the presence of Aβ1–40 triggered a significant emission enhancement of Cu-BTC/Tb assay due to the high binding affinity of Aβ1–40 for Cu2+ and the subsequent suppression of the quenching effect. In the assay, this LMOCP sensor shows high sensitivity with detection limit of 0.3 nM. Due to its capability to eliminate autofluorescence, Cu-BTC/Tb was also applied to the time-gated detection of Aβ1–40 in human plasma with promising results. This work presents a novel strategy for the construction of functional luminescent LMOCP for sensitively turn-on fluorescent sensing of Aβ1–40. We believe the proposed strategy would inspire the development of various LMOCP-based fluorescent assays or medical imaging platforms for advanced biological implementations.
研究领域:
生物化学
·
医学诊断
·
纳米材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2025
·Vol. 131
·期 7
·583
·
IF 2.8
Zou Wenqian,Zhang Mengyu,Liu Xichen,Ding Shoujun J.,Zou Yong
Developing highly efficient and stable inorganic narrow-band green-emitting phosphor is crucial for phosphor converted backlighting devices. In this study, trivalent Tb 3+ ions self-actived NaTb(MoO 4 ) 2 (NTM) narrow-band green-emitting phosphor was prepared by a conventional high-temperature solid-state reaction method. The electronic structure, luminescence properties and luminescence thermal stability of NTM were studied through experiments and theoretical calculations. The structure of NTM was determined to be a tetragonal phase with the space group of I41/a (88). Besides, the NTM was confirmed with direct bandgap characteristics with bandgap width of 3.1231 eV. Upon 266 nm and 355 nm ultraviolet (UV) excitation, the narrow-band green-emitting properties of the phosphor were investigated. Importantly, the phosphor was confirmed with well luminescence thermal stability and the thermal activation energy ( E a ) was fitted to be 0.32 eV. The work demonstrates that trivalent Tb 3+ ions self-actived NTM is promising as high luminescence stable narrow-band green-emitting phosphor for backlighting display applications.
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产品关联
DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 57
·45693-45702
·
IF 3.84
Anming Li,Dekang Xu,Hao Lin,Shenghong Yang,Yuanzhi Shao,Yueli Zhang,Zhenqiang Chen
Well-crystallized and uniform NaGd(MoO4)2 microcrystals with morphologies of bipyramids, truncated bipyramids, quasi-cubes and tetragonal plates were selectively synthesized via a facile hydrothermal method without any additives under mild conditions. The effects of Na2MoO4/Gd(NO3)3 molar ratios and pH values of precursor solutions on the phase and morphology of the as-synthesized microcrystals were systematically investigated. The molar ratios and pH values played key roles in the selective synthesis of pure phase NaGd(MoO4)2 microcrystals with regular morphology. With increasing Na2MoO4/Gd(NO3)3 molar ratios in the appropriate pH range, the morphology of the products changed from bipyramids, truncated bipyramids, quasi-cubes to tetragonal plates, namely, the morphological truncation degree increased gradually. NaGd(MoO4)2 tetragonal microplates could be synthesized at the molar ratio of 9 : 1. A possible morphological formation mechanism of NaGd(MoO4)2 tetragonal microplates was proposed, i.e. nucleation-Ostwald ripening growth process. Color tunable photoluminescence properties of NaGd(MoO4)2:Eu3+,Tb3+ microcrystals were studied in detail. Among the different morphologies of NaGd(MoO4)2:5% Eu3+ microcrystals, tetragonal microplates had a broadened, red-shifted and enhanced charge transfer band in the excitation spectrum. What's more, the full-width at half-maximum for the charge transfer band of the tetragonal plates was highest (58 nm), which favored efficient excitation and absorption in the ultraviolet region. The introduction of a small amount of Tb3+ into NaGd(MoO4)2 microplates doped with Eu3+ would enhance the 5D0 → 7FJ transition of Eu3+ at 616 nm due to the energy transfer process of cross-relaxation from Tb3+ to Eu3+. Multicolor tunable luminescence from deep red, red, orange, yellow to green under 291 nm ultraviolet excitation and from red, reddish orange to pink under 380 nm near-ultraviolet excitation could be obtained in NaGd(MoO4)2 tetragonal microplates by simply adjusting the doping concentrations of Eu3+ and Tb3+, suggesting NaGd(MoO4)2:Eu3+,Tb3+ microcrystals might have practical application in optoelectronic devices, such as light emitting diodes and color display systems. This facile morphology-controlled hydrothermal synthesis strategy was simple, low-cost and environment-friendly, and might be extended to other inorganic materials.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Yu Zhang,Xuejie Zhang,Haoran Zhang,Zhan-Chao Wu,Yingliang Liu,Li Ma,Xiaojun Wang,Wei-Ren Liu,Bingfu Lei
A series green emission phosphors Sr 3 Lu 2 (BO 3 ) 4 :Ce 3+ ,Tb 3+ (denoted as SLBO:Ce 3+ ,Tb 3+ ) with broad absorption band matching well with UV LED chip were synthesized by the solid–state reaction method. The phase and structure were analyzed with XRD , EDX , FT-IR measurements. The energy transfer between Ce 3+ and Tb 3+ in SLBO was proved by spectra and decay curves detailedly. The emission colors vary from blue to green by adjusting the ratio of Ce 3+ /Tb 3+ doped concentration. With temperature increasing, SLBO:Ce 3+ ,Tb 3+ phosphor shows well thermal stability that emission intensity retains 70% of its initial at 25 °C even temperature rising to 150 °C. The internal and external quantum efficiency of SLBO:3%Ce 3+ ,8%Tb 3+ are 77.5% and 34.8% under 340 nm excitation, respectively. Combining the as-synthesized SLBO:Ce 3+ ,Tb 3+ and red emission phosphor CaAlSiN 3 :Eu 2+ coated on a 365 nm UV chip, a warm white LEDs device with CRI of 83 was achieved. All the results indicate that the SLBO:Ce 3+ ,Tb 3+ phosphor has potential application in UV pumped white LEDs.
研究领域:
材料科学
·
光电子学
·
发光材料
·
固态照明
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）