JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Shu-Juan Zhao,Yu-Chen Ao,Zhengxiang Cai,Qi-Hua Yang,Pei Tang,Han-Qi Wei,Yayun Zhou,Puxian Xiong,Ge-Mei Cai
Flexible mechanoluminescent (ML) composite elastomers hold great promise for intelligent health monitoring, safety warning, and human-machine interaction. Yet, their practical adoption is hampered by the prevalent reliance of most current materials on pre-irradiation sources such as ultraviolet light or X-rays, which fundamentally limits operational convenience. Herein, we leverage the outstanding ion-incorporation capacity of borates to develop a new class of high-performance ML materials that require no pre-irradiation. Flexible composite films based on LaBO 3 :Re 3+ Re = Sm, Eu, Tb, Dy, Tm) display stimulus-responsive ML across the visible spectrum (400–800 nm) under diverse mechanical stimuli. Crucially, the films based on LaBO 3 :Tb 3+ exhibit good cyclic stability and a self-recovering ML property, where the intensity recovers to 88.7% of its original intensity after 12 h. Mechanistic investigations attribute the ML emission to electron bombardment on activator ions, induced by interfacial triboelectric effects. The practical viability potential of this material system further demonstrates by fabricating self-powered light source of bicycle sharing and multimodal anticounterfeiting devices. These findings confirm borates as suitable carriers for high-performance ML and offer a novel material platform for designing intelligent optical devices.
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Materials Today Chemistry
·
2025
·
IF 6.7
Wenqian Xu,Xue Yang,Xiangyu Zhang,Yuqiang Wang,Dangli Gao
Long persistent luminescence (PersL) materials serve as core functional materials in diverse cutting-edge fields including spectroscopy, photochemistry, photonics, materials science, and energy storage/conversion, underpinning the development of key technologies in these domains. However, the fundamental mechanisms governing the interactions between trap states and luminescent centers remain poorly understood, hindering the rational synthesis of high-performance PersL materials and relegating it largely to inefficient trial-and-error. Herein, we developed a series of NaGdGeO 4 :Bi 3+ ,Ln 3+ (Ln = Eu, Sm, Pr) phosphors that exhibit multi-color PersL. Notably, by monitoring PersL emissions from distinct luminescent centers such as Bi 3+ and Ln 3+ within a single phosphor, we observe that thermoluminescence profiles depend on the specific luminescent centers involved. Guided by the bistability of luminescent centers and their energy-level matching with trap states in the host matrix, we propose a phenomenological theory defining luminescent centers as effective PersL centers. Our study deepens the understanding of mechanisms and provides a theoretical framework for designing next-generation PersL materials.
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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.
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高影响因子
ACS Applied Nano Materials
·
2022
·
IF 6.14
Hangtao Ye,Qin Wang,Ziyao He,Yao Tong,Wei Xia,Hongbin Fan,Weidong Xiang,Xiaojuan Liang
In recent years, silicon (Si) photodetectors (PDs) have been widely used in daily life, but the ultraviolet (UV) region response is extremely low, while perovskite nanocrystals (NCs) can be used as a light conversion layer to effectively improve the UV region detection performance due to their high absorption coefficient. At the same time, embedding NCs into a glass matrix can protect NCs from the adverse external environment, which can greatly prolong the effective working time of the detector. In this work, a series of perovskite NC glasses (PNGs) with intrinsic emission but still maintaining high transmittance were fabricated successfully by regulating the concentration of CsPbCl2Br1 NCs. Furthermore, the rare-earth ion Tb3+ was successfully introduced into CsPbCl2Br1 NCs, achieving energy transfer of the exciton to Tb3+, and the photoluminescence quantum yield (PLQY) had a big boost from 11.1 to 28.1%. In the end, the prepared CsPbCl2Br1:Tb3+ PNG was first integrated with Si PDs, and the UV responsibility of Si PDs was enhanced due to the absorption of CsPbCl2Br1 PNG doped with Tb3+ in the UV region. At 320 nm, the responsivity of Tb3+-doped CsPbCl2Br1 PG-Si PDs is significantly higher than that of bare Si PDs. In addition, CsPbCl2Br1:Tb3+ PNG-Si PDs maintained excellent photocurrent stability. The CsPbCl2Br1:Tb3+ PNGs are expected to be one of the optimum semiconductor materials for next-generation high-performance UV PDs.
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CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Xiaolei Zhu,Xiaoping Wang,Xianke Sun
Bi 3+ /Tb 3+ /Mn 2+ -activated SrZnSO phosphors were prepared to investigate their luminescence characteristics. The SrZnSO:Bi 3+ , SrZnSO:Mn 2+ and SrZnSO:Tb 3+ phosphors, excited by the NUV/blue light, show blue, orange and green emissions, respectively. The Bi 3+ → Tb 3+ , Tb 3+ → Mn 2+ and Bi 3+ → Mn 2+ energy transfer processes take place in Bi 3+ /Tb 3+ -, Tb 3+ /Mn 2+ -, Bi 3+ /Mn 2+ - and Bi 3+ /Tb 3+ /Mn 2+ -activated SrZnSO phosphors, which result in tunable luminescence of these phosphors. The CIE coordinates were calculated on the basis of the emission spectra, and they reflect the emission color changes of phosphors. For the Bi 3+ /Tb 3+ -, Tb 3+ /Mn 2+ - and Bi 3+ /Mn 2+ - activated SrZnSO phosphors, the emission points are located in the cyan, yellow and white light regions, respectively. For the Bi 3+ /Tb 3+ /Mn 2+ -activated SrZnSO phosphors, the light is in warm white light region.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Qingling Zeng,Wenxiang He,Fangfei Luan,Dongcai Guo
A novel BaCeF 5 : Tb 3+ , Eu 3+ color-tunable phosphor was synthesized using a co-precipitation-hydrothermal method. The photoluminescence (PL) spectra revealed that BaCeF 5 has its own fluorescence effect as blue emission. The energy transfer process from Ce 3+ to Tb 3+ was achieved after doping with Tb 3+ , enabling the conversion of the luminous color from blue to green. By doping Eu 3+ in BaCeF 5 : 10 %Tb 3+ , the energy transfer process from Tb 3+ to Eu 3+ was further realized and the transition from green to orange light continued in the phosphor. Finally, the energy transfer mechanism of Ce 3+ -Tb 3+ -Eu 3+ in the BaCeF 5 : Tb 3+ , Eu 3+ samples was explored. The results indicate that by varying the Tb 3+ and Eu 3+ concentrations, the phosphor transition from blue - green - orange light can be performed, which is a promising material to be applied to multicolor emission modulated luminescent materials as well as incandescent lamp materials.
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LUMINESCENCE
·
2021
·Vol. 36
·期 8
·1901-1909
·
IF 2.464
Yan-hong Liu,Xiao-guang Ma,Li-ye Zhu,Meng Li,Xiao-xia Ren,Man Zhang
The SiO 2 @SiO 2 :Tb(1,2-BDC) 3 phen microspheres with monodispersed core-shell structure, are kind of fluorescent particles, which are prepared by a seeded growth method under the catalysis of glacial acetic acid (1,2-BDC, 1,2-benzenedicarboxylic acid; phen, 1,10-phenanthroline). Firstly, silica seed was fabricated by the hydrolysis of ethyl orthosilicate, and the Tb(1,2-BDC) 3 phen was prepared by using 1,2-BDC and phen. Then, a thin mesoporous silica shell doped with Tb(1,2-BDC) 3 phen was grown on the prepared monodisperse silica colloids. The prepared phosphor was analyzed by Fourier-transform infrared spectroscopy, X-ray diffraction analysis, scanning electron microscopy, transmission electron microscopy, thermogravimetric and fluorescence spectroscopy. The experimental results showed that the diameter of the SiO 2 @SiO 2 :Tb((1,2-BDC) 3 phen microsphere was about 200 nm with a typical core-shell structure, among which the diameter of the silica core was 180 nm, and that of the mesoporous silicon shell doped with terbium complex was about 10 nm. The fluorescence intensity of SiO 2 @SiO 2 :Tb((1,2-BDC) 3 phen microsphere is nearly three times higher than that of Tb((1,2-BDC) 3 phen complexes. The prepared microspheres could be widely used in bio-imaging, optoelectronic appliances and medical diagnosis.
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JOURNAL OF SOLID STATE CHEMISTRY
·
2020
·
IF 2.726
Cui Chen,Yuxuan Xia,Zizheng Yue,Wenlin Feng,Xiaozhan Yang
A series of Tb 3+ (or Bi 3+ ) doped and Tb 3+ , Bi 3+ co-doped CaAl 2 O 4 phosphors were successfully prepared by the conventional solid state reaction method. The properties of the as-prepared samples, including the crystal structure, morphology, composition and photoluminescence properties are characterized by the X-ray diffraction (XRD), high-resolution transmission electron microscope (HRTEM), energy dispersive spectrometer (EDS), high-angle annular dark field (HAADF) image and spectroscopy technology, etc. The diffraction patterns of the doped samples display the peaks corresponding to the CaAl 2 O 4 phase. The EDS and HAADF indicate that the Ca, Al, O, Tb and Bi elements are distributed uniformly in the Tb single-doped and the Tb, Bi co-doped CaAl 2 O 4 samples. In order to investigate the energy transfer from Bi 3+ to Tb 3+ , the critical (or optimal) doped concentrations of Tb and Bi in CaAl 2 O 4 are obtained experimentally in sequential order. The critical doped concentrations (single-doped: 3 mol%Tb 3+ , and co-doped: 3 mol%Tb 3+ , 0.3 mol%Bi 3+ ) for CaAl 2 O 4 hosts have been determined. A strong blue-green luminescence corresponding to 5 D 4 → 7 F 5 transition of Tb 3+ by near ultra-violet (367 nm) excitation and the obvious energy transfer from Bi 3+ to Tb 3+ in the co-doped CaAl 2 O 4 can be observed. The energy transfer mechanism has been discussed. The CIE coordinates and decay lifetimes for the typical samples have also been investigated. It is found that CaAl 2 O 4 : Tb 3+ , Bi 3+ is a blue-green emitting phosphor and has higher efficiency for the operation with near ultra-violet excitation.
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Optoelectronics Letters
·
2020
·Vol. 16
·期 5
·355-359
·
IF 0
Bian Ming-jing,Zhang Hong-yan
In this work, we studied the effect of different pH values on morphology, band gap and photoluminescence (PL) properties of Eu 3+ /Tb 3+ co-doped ZnO prepared by coprecipitation method. Experimental results show that alkaline condition is more favorable for the doping of Eu 3+ and Tb 3+ ions which reduce the band gap and increases the PL intensity of UV emission (385 nm) and visible emission (400—600 nm) of ZnO. Gaussian deconvolution PL spectra show that the defects on the surface of ZnO are decreased when it is synthesized under alkaline conditions. Furthermore, both the intrinsic orange emission of Eu 3+ ions (611 nm) and the intrinsic green emission of the Tb 3+ ions (495 nm) of ZnO in this case are obtained at the same time. High intensity green and orange emission indicates that Eu 3+ /Tb 3+ co-doped ZnO is a promising PL material and has potential in emission devices.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Qihua Yang,Hanqi Wei,Guihua Li,Shujuan Zhao,Yuchen Ao,Xuan Liu,Le Fu,Gemei Cai
Cs 3 Cu 2 I 5 materials exhibit significant potential in diverse application fields like LEDs, scintillation, photoelectric detection, and so on. However, their poor stability against moisture /water and singularity nature of emission band hinder their rapid utilization. Differing from the lattice or ligand modification methods commonly used, this work deftly integrates solid-state sintering and glass composite techniques to synthesize Cs 3 Cu 2 I 5 nanocrystal-in-glass composite (NGC) with exceptional stability. Cs 3 Cu 2 I 5 NGC demonstrated remarkable stability, maintaining its integrity even after immersion in an aqueous solution for 240 h or exposure to air for 180 days. Importantly, this proposed fabrication approach further utilizes the high solubility of glass materials for rare earth elements to solve the problem of the low solid solubility of Re 3+ in Cs 3 Cu 2 I 5 . The full-spectrum tunable emission has been achieved in the composite of Re 3+ and Cs 3 Cu 2 I 5 materials for the first time. This study not only validates Re-Cs 3 Cu 2 I 5 NGC as a promising fluorescent material but also establishes a novel method for fabricating composite materials based on rare-earth and copper perovskites, along with verifying their suitability in optical applications such as anti-counterfeiting and temperature measurement.
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ACS Biomaterials Science & Engineering
·
2019
·
IF 4.511
Ruichan Lv,Yanxing Wang,Jun Liu,Miao Feng,Fan Yang,Xue Jiang,Jie Tian
Photoactive theranostics including photodynamic therapy (PDT) hace aroused an intensive interest that combines medical diagnostics with treatment under a single irradiation laser. However, the conventional organic PDT agents usually suffer from aggregation caused by the quenching effect. In this research, we designed a core–shell–shell (CSS) UCNPs with NaGdF4 as the host, and the UCNPs could emit higher blue/green light by the energy transfer processes among Nd/Yb/Tm/Gd/Tb under 808 nm laser. When the CSS UCNPs were combined with the MnO2 semiconductor as the energy acceptor, CSS@Mn could be utilized as an effective PDT agent under a NIR laser. The temperature also increased more than 12.2 °C under the 808 nm laser, indicating the potential of synergistic photothermal therapy (PTT) and PDT. Interestingly, cells with small amounts of H2O2 could be responsive to the CSS@Mn platform. The antitumor effect was proved by the in vitro and in vivo experiments. Also, the biocompatibility, biodistribution, and excretion pathway were detected and revealed by the H&E stained pathological section and photoacoustic (PA) images. That means this platform could be potentially used as antitumor PDT/PTT agents.
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MACROMOLECULAR CHEMISTRY AND PHYSICS
·
2018
·Vol. 219
·期 24
·1800403
·
IF 2.492
Chunyan Zhang,Jianxin Luo,Wenjun Li,Lijuan Ou,Guipeng Yu,Chunyue Pan
An environment-friendly synthesis of a covalently bonded terbium(Tb)-complex-containing monodispersed fluorescent porous copolymer microspheres, and their highly selective detection of Fe 3+ are described. The as-made copolymer microspheres exhibit intense green fluorescence originating from Tb ions and high photostability in water. Encouragingly, the fluorescence of the copolymer microspheres can be selectively quenched by trace Fe 3+ due to the interaction between Fe 3+ and the ligands, which disturbs the coordination structure of Tb-complexes and inhibits the energy transfer from ligands to Tb ions. The intense fluorescence intensity, high fluorescence stability, together with the nanoscale and porous nature of the copolymer microsphere endows them with wide detection range (0–1500 µ m ) and low detection limit (2.1 µ m ) for selective recognition of Fe 3+ in aqueous environment. This study paves a new pathway for the function of porous copolymer microspheres being used as targeting for biological detection and environmental issues.
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