JOURNAL OF LUMINESCENCE
·
2019
·
IF 2.961
Qianru Zhao,Jiang Zhao,Min Tao,Cheng Wang,Xueqin Zeng,Yongmin Hu,Shengfu Wang,Minghua Zeng,Wei Zhou,Haoshuang Gu,Yuebin Li
The lanthanide doped NaYF 4 , one of the most efficient upconverting materials, which shows great potential in the applications of future optoelectronic devices. Although there are many progress on the synthesis and performance modulations of upconversion fluorescence single crystal and nanoparticles , it is still a great challenge to fabricate upconverting thin film to compatible with modern planar silicon photoelectronic devices. In this work, patterned NaYF 4 : Yb 3+ , Er 3+ thin films were prepared by a well-designed strategy combined with photolithography and electrodeposition at 50 °C. The thickness of NaYF 4 : Yb 3+ , Er 3+ thin films could be modulated from 1.6 ± 0.3 to 6.1 ± 0.4 μm by the deposition time. After the further annealing at 300 °C, the NaYF 4 : Yb 3+ , Er 3+ thin films present efficient green upconversion fluorescence with fine spectra from 510 to 720 nm, which resulted from the electronic transitions of doped Er 3+ ions . The application of laser direct-writing mask could introduce the desired micropattern of NaYF 4 : Yb 3+ , Er 3+ thin films, which show uniform distributed green upconversion fluorescence pixel with fine resolution of about 50 μm. The intense upconversion luminescence pattern with high spatial resolution show great application potential in the fields of displays, photodetectors , biological sensors, solar energy converter and commercial anticounterfeiting.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2023
·
IF 10.9
Limin Wu,Zeyu Cheng,Shoulei Xu,Wenxia Wu,Yazhao Wang,Huiting Zhang,Zhonghua Zhu,Ninghan Zeng,Bernard Albert Goodman,Wen Deng
High quality optical single crystals of cubic Yb 2.96 Er 0.04 Al 5 O 12 and Y 2.96 Er 0.04 Al 5 O 12 were successfully prepared using the OFZ method. The 980 nm photon absorption intensity by Yb 2.96 Er 0.04 Al 5 O 12 crystal is much larger than that in Y 2.96 Er 0.04 Al 5 O 12 crystal, the transmission of Yb 2.96 Er 0.04 Al 5 O 12 crystal is lower than that of Y 2.96 Er 0.04 Al 5 O 12 crystal, because the density of Yb 2.96 Er 0.04 Al 5 O 12 single crystal (6.604 g/cm 3 ) is larger than that of Y 2.96 Er 0.04 Al 5 O 12 single crystal (4.529 g/cm 3 ). The up-conversion luminescence spectra of the crystals excited by 980 nm laser show several distinct groups of emission peaks at ∼544 and ∼556 nm, as well as ∼650 and ∼667 nm. The peak intensities of the up-conversion luminescence spectrum for the Yb 2.96 Er 0.04 Al 5 O 12 crystal were much higher than those for the Y 2.96 Er 0.04 Al 5 O 12 crystal. Overall, the results of the present study suggest that Yb 2.96 Er 0.04 Al 5 O 12 single crystal may have advantages over Y 2.96 Er 0.04 Al 5 O 12 single crystal for luminescence in solid-state lasers.
研究领域:
光学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS LETTERS
·
2012
·
IF 2.307
Yanjie Liang,Kangning Sun,Weili Wang,Pengfei Chui,Xiaolin Sun
In this paper, YVO 4 :Yb 3+ ,Er 3+ microspheres have been successfully prepared through a facile hydrothermal method assisted with disodium ethylenediaminetetraacetic acid and citric acid. X-ray diffraction, field emission scanning electron microscopy , energy disperse X-ray spectroscopy, high resolution transmission electron microscopy , and photoluminescence spectra were used to characterize the samples. The results reveal that the as-prepared YVO 4 :Yb 3+ ,Er 3+ samples are well-crystallized and spherical in shape. Moreover, the microspheres with diameters of 6–8 μm are assembled by numerous submicron cuboids. Under the excitation of a 980 nm laser diode , the samples show the characteristic emissions of Er 3+ and the green emissions at 525 nm of 2 H 11/2 → 4 I 15/2 are dominantly strong.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2021
·
IF 5.302
Zuodong Liu,Yumeng Ji,Chunyan Xu,Yuqing Wang,Yang Liu,Qilong Shen,Guoqiang Yi,Yongsheng Yu,Bingchu Mei,Peng Liu,Qiangshan Jing
Raw SrF 2 powders were synthesized by the chemical precipitation method, and the mean particle size was 58.48 nm. Er:SrF 2 transparent ceramics were obtained by hot-pressed (HP) technique, and the effect of ErF 3 levels on the transparency, microstructure, luminescence spectroscopic and microhardness were studied. The ratio of emission intensities R (Red/Green) increased with the ErF 3 doping levels. The addition of ErF 3 was found effectively to reduce grain size and has a positive effect on improving the microhardness. The SrF 2 ceramic doped with 5 wt.% ErF 3 (2 mm thick) showed the best optical transparency, the transmittance at 500 nm and 1200 nm are 87.9 % and 89.5 %, respectively. The average grain size, Vickers hardness ( Hv ), and fracture toughness ( K IC ) for the SrF 2 ceramic were 21.1 ± 4.5 μm, 1.73 ± 0.04 GPa, and 0.52 ± 0.08 MPa·m 1/2 , respectively.
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
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Guomin Li,Bing Wang,Jian Zhang,Rui Wang,Huiling Liu
Through direct thermal condensation of a mixture of Er(NO 3 ) 3 ·5H 2 O and melamine at 550 °C for 2 h, a series of rare earth agent Er (III)-doped mesoporous g-C 3 N 4 (xECN, x = 1,2,3) with different Er content were successfully synthesized. XRD, solid-state 13 C CP/MAS, FT-IR, XPS, UV–Vis DRS, photocurrent, EIS, SEM, TEM, BET and Zeta potentials were used to characterize the phase, morphology, optical and surface properties of xECN photocatalysts. The photo-activities of xECN samples for degradation of Rhodamine B (RhB), tylosin (TYL) and tetracycline (TC) were enhanced compared with those of pure g-C 3 N 4 under the irradiation of simulated solar, and the 2ECN catalyst displayed the optimal degradation rate for all three organic pollutants. The UV–vis results demonstrated that Er doping narrowed the band gap while increasing the light harvesting ability, which improved the photocatalytic activity of g-C 3 N 4 catalyst. The leaching and toxicity tests were conducted with pakchoi seeds and Escherichia coli bacteria, demonstrating that the leaching toxicity of xECN could be ignored. Free radical capture tests were carried out to confirm the main active species for the degradation of RhB under the same experimental condition.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2021
·
IF 4.464
Siyu Chen,Pan Liu,Yang Li,Mengyi Zhu,Yuan Dang,Yuanzhen Zhou
Rare earth elements Er doped CdWO 4 (Er-CdWO 4 ) nanorods were successfully prepared. The morphology, crystal structure, chemical environments and electrochemical properties of Er-CdWO 4 nanomaterials were regulated by changing the doping amount of Er. Scanning electron microscope (SEM) and transmission electron microscopy (TEM) have shown that the introduction of moderate content of Er could optimize the morphology of CdWO 4 . X-ray diffraction (XRD) results suggested that the larger Er ions partially replaced the Cd ions in CdWO 4 nanocrystals and produced favorable lattice gaps and defects around the unit cell. The high-resolution X-ray photoelectron spectroscopy (XPS) of O 1 s and the enhanced peak intensity in electron spin resonance (EPR) declared that the doping of Er generated more oxygen vacancies in Er-CdWO 4 . Based on the physico-chemical characterizations, 0.5 wt% Er-CdWO 4 was confirmed to be the best electrocatalyst within the tested samples, which exhibited the fastest electron transfer performance and the strongest electrocatalytic capacity to BPA. Taking the low-cost and simply prepared Er-CdWO 4 with the optimal content of Er as the electrode modifier, a novel electrochemical sensor (Er-CdWO 4 /CPE) for BPA has been constructed for the first time, which exhibited the wide linear range from 0.01 to 6 μM and the limited detection of 0.003 μM, respectively. Moreover, satisfactory reproducibility, stability and anti-interference performance were also achieved on Er-CdWO 4 /CPE. Meanwhile, the proposed sensor successfully realized the determination of BPA spiked in local tap water samples.
研究领域:
材料科学
·
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Peng Wang,Shiqi Zhong,Ying Wang,Liyao Zou,Fangyuan Yu,Cong Lin,Mei Lin,Min Gao,Chunlin Zhao,Xiao Wu,Chao Chen
The pursuit of high-performance piezo-photocatalysts through structural modifications has been a focal point of investigation within the realm of related scientific disciplines. In this study, we successfully designed Er-doped Bi 0.5 Na 0.5 TiO 3 –BaTiO 3 combined with rare earth ion doping and solid solution modification, and the prepared particles exhibited homogeneous grain sizes and optimized concentrations of oxygen vacancies ( O V ). The synergistic incorporation of O V (accelerator for catalytic reaction) and Er 3+ results in an impressive 12-fold enhancement of the piezo-photocatalytic rate when degrading the Rhodamine B dye. The optimal composition 0.96BNT-0.04BT-Er demonstrates outstanding electrochemical properties , including a superior photocurrent response and minimal impedance, highlighting its exceptional performance in piezo-photocatalysis. The fundamental enhancement in catalytic performance can be attributed to the reconfiguration of the band structure of 0.96BNT-0.04BT-Er, which has been meticulously calculated utilizing DRS and VB-XPS and the internal mechanism was explained in detail. This research serves as a source of inspiration for the investigation of solid solutions among piezo-photocatalysts and sheds light on the vital role of band structure in governing catalytic performance.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2024
·
IF 3.8
Hui Wang,Hui Hu,Kevin Homewood,Yun Gao
Double perovskites have shown great potential in addressing the toxicity and instability concerns of lead halide perovskites for practical applications. However, the fabrication of high-quality double perovskite single crystals has remained challenging. Here, large Er-doped Cs 2 AgBiCl 6 single crystals (SCs) with a maximum dimension of 8 mm were successfully prepared using a solution temperature-lowering (STL) method. The photoluminescence (PL) spectra were excited by the lasers with energies below and above the band gap, and the origin of the abnormal PL peaks changing with temperature is explored. The photodetector made from the Er-doped Cs 2 AgBiCl 6 SCs shows a significantly enhanced light responsivity and detectivity in the wavelength range from 370 nm to 660 nm compared with the undoped one, with excellent environmental and radiation stability. It reveals that the Er ions can be successfully doped into double perovskite single crystal, benefiting the application to optoelectronic devices.
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
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Manting Zeng,Xingzhong Liu,Hua Hao,Zhonghua Yao,Hanxing Liu
BaTiO 3 -1.6MnO 2 - x Er 2 O 3 ceramics (abbreviated as BMT- x Er) and BaTiO 3 -1.6MnO 2 -3Er 2 O 3 - x MgO ceramics (abbreviated as BEMT- x Mg) were prepared under a reducing atmosphere by solid-state synthesis method in this work. The effects of Er/Mg co-doping on phase transformation, microstructure, dielectric properties, and defect were systematically investigated. Research shows that Er-doping reduces the Curie temperature and increases the dielectric constant of BaTiO 3 ceramics at low temperatures. Mg-doping refines the grain size and makes the grain size distribution more uniform, which is an important reason for the enhanced bias stability. The substitution of Mg at the B-site generates additional oxygen vacancies which capture free electrons and simultaneously forms defect dipoles. The anti-reducing properties are improved by reducing the carrier concentration. The synergistic effect of co-doping forms defect dipoles such as [ Mg Ti ″ ‐ 2 Er Ba ∙ ] , [ Mg Ti ″ ‐ V O ∙ ∙ ] and [ 2 Er Ti ′ ‐ V O ∙ ∙ ] to enhance dielectric relaxation behavior which is considered to be the reason for the improved dielectric temperature stability. When x = 0.4, optimized dielectric ceramics are obtained with ε 25°C = 1820, tanδ = 0.009, resistivity of 1.0 × 10 11 Ω·cm, which meets the EIA X7R standard (−55 °C - 125 °C, TCC ≤ ± 15 %).
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
APPLIED OPTICS
·
2017
·Vol. 56
·期 17
·4905-4910
·
IF 1.65
Yuan Cheng,Kangning Sun
Core-shell structured SiO2@YVO4:Yb3+, Er3+, Eu3+ nanospheres were prepared by a simple solgel method followed by a subsequent heat treatment. The as-prepared composites were characterized by a scanning electron microscope, high-resolution transmission electron microscope, x-ray diffraction, and photoluminescence spectra. The influences of different coating numbers were also studied. To sum up, the composites are spherical shaped with an average diameter of 200 nm, and the YVO4:Yb3+, Er3+, Eu3+ luminescent particles are successfully coated on the surface of SiO2 nanospheres. Under the near-infrared irradiation at 980 nm, the composites can emit strong green lights (at 525 nm, 550 nm) attributed to the H11/22→I15/24, S3/24→I15/24 transitions of Er3+ ions, and slight red lights (at 590 nm, 620 nm) attributed to the D05→F17, D05→F27 transitions of Eu3+ ions. Given the above, due to the regular core-shell structure, the uniform distribution of nanoparticles, and the colorful emissions, the SiO2@YVO4:Yb3+, Er3+, Eu3+ nanospheres may have great potential for some biological applications, such as biological tracers, bio-labeling, and so on.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2011
·
IF 1.795
Yanjie Liang,Jun Ouyang,Hongyou Wang,Weili Wang,Pengfei Chui,Kangning Sun
In this paper, the core–shell structured SiO 2 @YVO 4 :Yb 3+ ,Er 3+ microspheres have been successfully prepared via a facile sol–gel process followed by a heat treatment. X-ray diffraction, field emission scanning electron microscopy, energy disperse X-ray spectroscopy, transmission electron microscopy, Fourier transform infrared spectroscopy, and photoluminescence spectra were used to characterize the samples. The results reveal that the SiO 2 spheres have been successfully coated by YVO 4 :Yb 3+ ,Er 3+ phosphors to form core–shell structures and the size of obtained microspheres has a uniform distribution. Additionally, the samples exhibit bright green luminescence under the excitation of a 980 nm laser diode. The photoluminescence intensity increases with the number of coatings. These core–shell structured SiO 2 @YVO 4 :Yb 3+ ,Er 3+ microspheres may have great potential in the fields of infrared detection and display devices.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2014
·
IF 2.129
Yanhua Tong,Feng Cao,Jintian Yang,Minhong Xu,Chu Zheng,Xingyu Zhu,Di Chen,Min Zhang,Fan Huang,Jie Zhou,Lixiao Wang
Pristine and erbium-doped ZnS urchinlike hierarchical nanostructures were successfully synthesized via a chemical solution route. Morphologies of ZnS products have been controlled by adjusting sulfur source and the ratio of ethylene glycol to water by volume. The crystal structures, morphologies and chemical composition of samples were analyzed by X-ray powder diffraction, transmission electron microscopy and atomic emission spectrometry . The photoluminescence (PL) properties of samples were analyzed by spectrofluorometer. It was first found that its broad blue emission is originated not from zinc vacancies or just sulfur vacancies but from sulfur vacancies as well as extended sulfur-vacancy states. PL emission spectra of Er-doped ZnS urchinlike architectures indicated that Er doping can increase sulfur vacancies and extended sulfur-vacancy states. Photocatalytic experiments demonstrate that ZnS with 0.1 atomic% of Er 3+ performs the best photocatalytic activity . Photogenerated carriers transfer from outer surface to organic molecules and recombination inside ZnS were investigated by adsorbance and PL spectra, respectively. The results suggest that strong adsorptivity of Er-doped ZnS facilitates the transfer of photogenerated carriers from surface of ZnS to dye molecules; however, higher content of Er could in turn assists photogenerated electron–hole recombination inside ZnS.
研究领域:
材料科学
·
光学
·
纳米技术
·
化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）