APPLIED PHYSICS B-LASERS AND OPTICS
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2022
·Vol. 128
·期 3
·1-9
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IF 2.171
Zhao Feng,Chu Yunting,Zhao Qianyun,Zhang Weiwei,Sun Jingchang,Li Chengren
A series of CaSrSiO 4 : Yb 3+ , Er 3+ , x Ag phosphors have been prepared by high-temperature solid-state reaction method. Scanning electron microscope (SEM) images show that more small spherical particles gather together to form bigger cluster when Ag nanoparticles are co-doped into CaSrSiO 4 : 9Yb 3+ , 1Er 3+ nanophosphor. Photoluminescence intensities of samples co-doped Ag nanoparticles enhance significantly and the optimized Ag concentration is 0.6 mol%. The fluorescence intensity ratio, the absolute sensitivity, relative sensitivity and temperature resolution are measured, computed and discussed in the range of 303–703 K. The results show that all sensing performances of CaSrSiO 4 : Yb 3+ , Er 3+ , 0.6Ag phosphor are superior to these of the sample un-doped Ag particles and the maximum S A value can go up to 7.3 × 10 –3 K −1 , indicating that CaSrSiO 4 : 9Yb 3+ , 1Er 3+ , 0.6Ag designed and prepared in this work is a promising optical high-temperature sensing material and it is appropriate to practical application in comprehensive fields.
研究领域:
材料科学
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光学
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DOI
高影响因子
Sustainable Energy & Fuels
·
2021
·Vol. 5
·期 22
·5814-5824
·
IF 6.367
Ping Mu,Man Zhou,Kai Yang,Chensheng Zhou,Yuan Mi,Zhenzhen Yu,Kangqiang Lu,Zhengquan Li,Shaobo Ouyang,Weiya Huang,Changlin Yu
Using ion doping to engineer sulfur vacancies over metal sulfides is an effective method to improve photocatalytic properties, such vacancies form the center of the electron-captured state to promote the separation and transfer of photogenerated carriers. In this research, Yb/Er co-doped bulk Cd0.5Zn0.5S (CZS) was fabricated by a one-step simple hydrothermal process, and used for evaluating the catalytic activity for aquatic hydrogen production under visible light irradiation. The results showed that the Cd0.5Zn0.5S:Yb(15%), Er obtained exhibited a higher efficient photocatalytic activity of hydrogen evolution, in which the efficiency of Cd0.5Zn0.5S:Yb(15%), Er (422.0 μmol g−1 h−1) was 2.7 times higher than that of bare Cd0.5Zn0.5S (154.7 μmol g−1 h−1). This can be attributed to the augmented active surface area, the broadened spectral absorption of visible light and the facilitation of the separated efficiency of the photogenerated carriers. This finding provides a simple way to activate the metal-chalcogenides with S-vacancies for optimizing the photocatalytic performance.
研究领域:
材料科学
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能源化学
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高影响因子
RSC Advances
·
2017
·Vol. 7
·期 76
·48238-48244
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IF 3.108
Jiangyun Dai,Chao Yang,Hong Zhang,Hua Zhang,Guoying Feng,Shouhuan Zhou
The successful synthesis of rare earth doped nano/microcrystals with the desired morphology, uniform monodispersity, and intense infrared emission is of fundamental significance, and would facilitate their application in infrared emission-related miniaturization and integration in optoelectronics. However, simultaneously controlling the morphology and enhancing the infrared emission through simple and effective methods has not been well explored. In this study, via Ca2+ doping with an optimized concentration of 25 mol% in the hydrothermal solution, irregular NaGdF4:Yb/Er submicrocrystals converted into highly uniform submicrorods. Meanwhile, an obvious enhancement of visible upconversion (UC) and near-infrared (NIR) downconversion (DC) emission were obtained, probably due to the improved morphology and lowering the local crystal field symmetry around the rare earth ions induced by Ca2+ doping. Furthermore, Ce3+ ions with an optimized concentration of 2 mol% were codoped to intentionally tailor the branching ratio through efficient energy transfer from Er3+ to Ce3+. As a result, the ∼1530 nm emission intensity of the NaGdF4: 25Ca/2Ce/20Yb/2Er submicrorods increased by about 6.4 times in comparison with the NaGdF4:20Yb/2Er counterpart.
研究领域:
材料科学
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光学工程
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纳米技术
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稀土化学
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光电子学
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DOI
高影响因子
Science of Advanced Materials
·
2017
·
IF 1.671
Li Zhaozhi,Li Yuebin,Zhang Xianghui,Wang Lin,Hu Bo,Zhang Yi,Gu Haoshuang,Chen Wei
Near infrared (NIR)-to-visible upconversion nanoparticles of pure hexagonal phase β-NaYF4: Yb3+, Er3+ nanocrystals were successfully synthesized by a high boiling temperature organic phase synthesis strategy in oleic acid (OA), which acted
as a ligand. The upconversion photoluminescence intensity of the nanocrystals was modulated by varying the reaction temperature and the concentration of sensitizer Yb3+ ions and activator Er3+ ions. The prepared nanocrystals were investigated by transmission electron
microscopy (TEM), X-ray powder diffraction (XRD), and photoluminescence spectroscopy. All the results show that the as-prepared monodispersed upconversion nanocrystals emit high photoluminescence when excited by a 980 nm laser. It was found that the up-conversion emission spectra of β-NaYF4:
Yb3+, Er3+ presented three peaks at about 655, 540, and 521 nm. The optimized concentrations of the sensitizer Yb3+ and the activator Er3+ are 20% and 2% mmol, respectively. These highly efficient nanocrystals have exhibited great potential in bioimaging
and photoelectronic devices.
研究领域:
材料科学
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纳米技术
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光学材料
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光子学
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发光光谱学
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DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2026
·
IF 4.4
Yiming Wang,Anqi Zhang,Yang Yang,Ming Li,Guofeng Liu,Shala Bi,Jianfeng Wen,Li Jiang
Rare-earth ions Yb 3+ /Er 3+ co-doped Ca 2 LaNbO 6 have been synthesized successfully. • Photoluminescence of Ca 2 LaNbO 6 :Yb 3+ /Er 3+ under 980 nm excitation was investigated. • Temperature dependence of LIR of I 524 nm / I 565 nm and I 1569 nm / I 1543 nm were studied. • Temperature-dependent decay lifetimes at 524 nm and 565 nm were analyzed. • This work enables multi-mode, anti-interference optical thermometry. Optical thermometry based on the intrinsic luminescent properties of rare-earth ions offers effective immunity to environmental interference. To enable multi-mode thermometry – that is, simultaneous acquisition of the luminescence intensity ratio ( LIR ) and lifetime - Ca 2 LaNbO 6 co-doped with Yb 3+ and Er 3+ was synthesized via a high-temperature solid-state reaction. The phase structure, morphological information, and photoluminescence properties were systematically investigated. Under 980 nm excitation, the optimal luminescence intensity is attained when the concentrations of Yb 3+ and Er 3+ are 12 mol% and 6 mol%, respectively. The two-photon process gives rise to emission mechanisms within the visible range (524 nm: 2 H 11/2 → 4 I 15/2 ; 565 nm: 4 S 3/2 → 4 I 15/2 ; 664 nm: 4 F 9/2 → 4 I 15/2 ); the single-photon process leads to emission in the near-infrared region (1544 nm: 4 I 13/2 → 4 I 15/2 ). The LIRs for visible up-conversion emissions ( I 524 nm / I 565 nm ) and near-infrared down-conversion emissions ( I 1569 nm / I 1543 nm ), along with the lifetimes of the 524 nm and 565 nm emissions, all exhibit pronounced temperature dependence that can be effectively fitted by exponential functions. Overall, this study demonstrates potential for multi-mode, non-contact optical thermometry with anti-interference capabilities. Download: Download high-res image (84KB) Download: Download full-size image
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高影响因子
MODERN PHYSICS LETTERS B
·
2025
·
IF 2.2
Yongqiang Li,Changchun Ding,Yuxiang Wu,Bin Duan,Rangrang Fan,Fengyi Wang,Tong Liu,Wei Jin,Junshan Hu
In this work, a single near-infrared (NIR) upconversion phosphor of Yb 3 + /Er 3 + co-doped CaY 2 O 4 was prepared using an equivalent substitution strategy. The CaY 2 O 4 structure features a (R 2 O 4 ) 2 -framework of double octahedra, with rare earth ions located within the framework. When irradiated with a 980 nm near-infrared (NIR) laser, the phosphor emits 829 nm NIR light. The main excitation mechanism of the NIR emission was explained by the characterization of power dependence, absorption spectrum, and down shift-conversion spectra. The energy transfer (ET) process is the promotion of Er 3 + ions from the 4 I 1 3 ∕ 2 energy level to the 4 F 9 ∕ 2 energy level, and finally relax to 4 I 9 ∕ 2 energy level. The phosphor has potential application value in the biomedical field and bio-imaging due to its emission of NIR upconversion luminescence.
研究领域:
材料科学
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生物医学工程
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光学
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DOI
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-10
·
IF 15.7
Zhang Wen,Zheng Wei,Huang Ping,Yang Dengfeng,Shao Zhiqing,Zhang Wei,Zhang Hao,Xie Zhi,Xu Jin,Chen Xueyuan
Yb 3+ /Er 3+ activated upconversion (UC) materials have been widely applied in many advanced technologies owing to their high UC efficiency in the visible region. However, it is challenging to achieve efficient ultraviolet (UV) UC luminescence (UCL) in Yb 3+ /Er 3+ system, due to the dense energy levels of Er 3+ that impose deleterious nonradiative relaxation. Herein, we report a strategy to liberate the UV-UCL of Er 3+ based on the confined energy transfer in Yb 3+ /Er 3+ co-doped 0D Rb 3 InCl 6 with a low phonon energy and a large interionic distance. This facilitates the population of Er 3+ at the 4 G 11/2 state, which yields intense upconverted UV emission at 384 nm, with a much higher UV-to-green ratio ( I 384 / I 554 = 0.864) than that of traditional UC materials ( < 0.1). By leveraging the intense upconverted UV emission of Er 3+ , we demonstrate the application of Rb 3 InCl 6 :Yb 3+ /Er 3+ nanocrystals as a NIR-to-UV transducer for NIR-triggered anion exchange of CsPbX 3 perovskite nanocrystals with high efficiency and good controllability. These findings offer an approach for the exploration of novel UC materials via energy transfer and crystal lattice engineering towards versatile applications.
研究领域:
材料科学
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光学材料
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光子学
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纳米技术
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固体物理
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稀土材料
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能量传递
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Maohao Yang,Wanyin Ge,Peng He,Qian Zhang,Xin Xie
A simple and rapid grinding method for preparing Er 3+ -doped and Er 3+ /Yb 3+ co-doped Cs 3 Bi 2 Cl 9 upconversion phosphors was developed. We avoid to employ strong acids as reaction solvents, aligning with the principles of green chemistry. By controlling the thermal treatment temperature and adding BiCl 3 , a reversible phase transformation process between Cs 3 Bi 2 Cl 9 and Cs 3 BiCl 6 perovskite phosphors was achieved. The Er 3+ /Yb 3+ co-doped Cs 3 Bi 2 Cl 9 phosphors emit green light under 980 nm excitation, whereas Cs 3 BiCl 6 phosphors emit red light. Their temperature sensing performance was tested through variable-temperature processes. Compared to Er 3+ -doped Cs 3 Bi 2 Cl 9 phosphors, the co-doped Er 3+ /Yb 3+ phosphors have a higher relative sensitivity of 1.60 % K −1 . Compared to previously reported materials, Cs 3 Bi 2 Cl 9 phosphors show enhanced sensitivity in temperature sensing. The study demonstrates that lead-free halide perovskites’ unique color-tunability not only underscores the innovativeness of this synthetic strategy but also provides a significant technological foundation for temperature sensing applications. Given their environmental friendliness and facile preparation process, these phosphors possess notable advantages for industrial production and hold promise as potential candidates for next-generation high-performance phosphor materials.
研究领域:
材料科学
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光学
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化学
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纳米技术
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DOI
高影响因子
MOLECULES
·
2024
·Vol. 29
·期 20
·4887
·
IF 4.2
Hui Zeng,Yangbo Wang,Xiaoyi Zhang,Xiangbing Bu,Zongyi Liu,Huaiyong Li
Excitation wavelength controllable lanthanide upconversion allows for real-time manipulation of luminescent color in a composition-fixed material, which has been proven to be conducive to a variety of applications, such as optical anti-counterfeiting and information security. However, current available materials highly rely on the elaborate core–shell structure in order to ensure efficient excitation-dependent energy transfer routes. Herein, multicolor upconversion luminescence in response to both near-infrared I and near-infrared II (NIR-I and NIR-II) excitations is realized in a novel but simple NaYGeO4:Yb3+/Er3+phosphor. The remarkably enhanced red emission ratio under 1532 nm excitation, compared with that under 980 nm excitation, could be attributed to the Yb3+-mediated cross-relaxation energy transfers. Moreover, multi-wavelength excitable temperature-dependent (295–823 K) upconversion luminescence realizes a ratiometric thermometry relying on the thermally coupled levels (TCLs) of Er3+. Detailed investigations demonstrate that changing excitation wavelength makes little difference for the performances of TCL-based ratiometric thermometry of NaYGeO4:Yb3+/Er3+. These findings gain more insights to manipulate cross-relaxations for excitation controllable upconversion in single activator doped materials and benefit the cognition of the effect of excitation wavelength on ratiometric luminescence thermometry.
研究领域:
材料科学
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光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF LUMINESCENCE
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2024
·
IF 3.3
Xiaoyu Wu,Yang Yu,Kejie Li,Mingqin Huang,Zuoling Fu
The near-infrared-II (NIR-II) fluorescence thermometer based on rare earth-doped double perovskite is rarely. Herein, Er 3+ -Ho 3+ and Yb 3+ co-doped lead-free double perovskite La 2 MgTiO 6 (LMTO) phosphors were synthesized by a conventional high temperature solid phase method. The phase purity and morphology of the samples were analyzed using XRD and FE-SEM. The NIR-II luminescence properties of LMTO: Er 3+ -Ho 3+ -Yb 3+ phosphors were systematically investigated under laser irradiation at 980 nm. A NIR-II fluorescence thermometer was also designed based on non-thermal coupled energy levels originated from the 4 I 13/2 energy level of Er 3+ and the 5 I 6 energy level of Ho 3+ . The maximum value of relative sensitivity (S r ) was 0.54 % at 513 K. Compared to visible thermometers (LMTO: Er 3+ -Yb 3+ and LMTO: Ho 3+ -Yb 3+ ), the NIR-II thermometers offer better temperature measurement capability and penetration depth. All the experimental results show that the NIR-II thermometer with a wider range and higher sensitivity has been realized, which puts forward a new idea for the design and optimization of NIR-II thermometers.
研究领域:
材料科学
·
光学
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产品关联
DOI
高影响因子
Chemical Physics Impact
·
2025
·
IF 4.3
Zixuan Jiang,Bing Liu,Zehua Zhang,Lili Wang,Zhixu Jia,Dan Zhao
The co-doping effect of Zr 4+ ions on upconversion (UC) luminescent properties in visible region of Y 2 O 3 : Er 3+ and Y 2 O 3 : Er 3+ , Yb 3+ sub-microcrystals prepared by urea precipitation method has been investigated under 980 nm excitation. Compared with the original Y 2 O 3 : Er 3+ and Y 2 O 3 : Er 3+ , Yb 3+ sub-microcrystals, the UC luminescence of sub-microcrystals with similar size was enhanced after Zr 4+ ions co-doping. The UC luminescent properties have been discussed in detail via luminescence spectra, decay curve analysis and a suitable energy level diagram. The enhancement mechanism of UC luminescence in the two series of Zr 4+ ions doped sub-microcrystals was attributed to the complex crystal field around Er 3+ ions caused by Zr 4+ ions co-doping. After Zr 4+ ions substituted Y 3+ ions and entered the crystal lattice, the charge mismatch and lattice distortion made the crystal field more complex. This research contributes to the understanding of UC luminescent properties of lanthanide (Ln 3+ ) ions doped UC materials and their technological applications in fields such as bioimaging, drug delivery, and optical temperature sensors.
研究领域:
材料科学
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光学
·
生物成像
·
药物递送
·
光学温度传感器
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DOI
高影响因子
ACS Applied Nano Materials
·
2020
·
IF 0
Junshan Hu,Ruonan Wang,Rangrang Fan,Fengyi Wang,Huiyu Xiong,Zhenghu Huang,Lixin Liu,Hao Fu
Here, we report a nanocomposite with excellent photothermal performance promising for photothermal treatment. This nanocomposite is prepared by linking Au nanorods (NRs) to NaGdF4:18% Yb3+, 2%Er3+@NaYF4 core–shell upconversion nanoparticles (UCNPs) with bridging of polyethylene glycol molecules. Solutions with the composite nanoparticles can be heated by the irradiation of a near-infrared 980 nm laser, and the photothermal effect in terms of temperature rise can reach 21.3 °C with excitation power density as low as 0.090 W/cm2. This highly effective photothermal performance is attributed to coincidence of the emission band of the UCNPs and the absorption band of the Au NRs, which facilitates the light-to-heat conversion. The structure of the composite and the concentration of the Au NRs in the solution are also optimized through the emission intensity, green-to-red intensity ratio, and the photothermal effect in this work. Compared with previous research studies, the strength in the lower irradiation power density makes the nanocomposite promising for further photothermal treatment and temperature sensing.
研究领域:
生物医学工程
·
纳米技术
·
光学
✓ 已验证
产品关联
DOI
危险品化学品经营许可证（带存储）