JOURNAL OF MATERIALS SCIENCE
·
2020
·Vol. 55
·期 24
·10435-10452
·
IF 3.553
Zhang Kailian,Zhou Man,Yu Changlin,Yang Kai,Li Xiaoxiao,Yang Shi,Guan Jie,Dai Wenxin,Huang Weiya
Wide spectral responsive photocatalysts are of great importance for making full use of solar energy and broad application in highly efficient photocatalytic wastewater treatment, production of H 2 O 2 , etc. Thereinto, it is significative to open an appropriate way to extend the absorption to the NIR region, in which it accounts for ~ 49% in the solar spectrum. In this work, we synthesized successfully the new-style NaYF 4 :Yb 3+ , Er 3+ /Ag 2 CrO 4 photocatalyst via the hydrothermal and followed precipitation method, and it exhibited the more excellent photocatalytic performances than Ag 2 CrO 4 for the photocatalytic H 2 O 2 production and disposals of pollutants, such as methyl orange (MO), methylene blue (MB), rhodamine B (RhB) and tetracycline (TCs). The morphological, structural and optical behavior were investigated by XRD, SEM, N 2 adsorption/desorption, TEM, XPS, UV–Vis DRS, UC luminescence and photoelectrochemical experiments. It revealed that NaYF 4 :Yb 3+ , Er 3+ /Ag 2 CrO 4 photocatalyst presented stronger absorptive capacity in the visible–NIR region by the benign fluorescence resonance energy transfer (NaYF 4 :Yb 3+ , Er 3+ can convert near-infrared light to visible light via upconversion process), and showed more efficient charge transfer and separation than that of pure Ag 2 CrO 4 . The primary reactive species of ·O 2 − and h + by the trapping experiments played a considerable important role in the photocatalytic process. A promising potent system was suggested for the highly efficient utilization of sunlight in the enhancement of photocatalytic activities.
研究领域:
材料科学
·
环境科学
·
光化学
·
太阳能利用
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Qiying Huang,Weihao Ye,Xianfu Jiao,Linliang Yu,Yingliang Liu,Xiaotang Liu
Here, we show a core-shell nanostructure which effectively improves NIR-to-visible upconversion quantum efficiency and luminescence intensity. The NaYF 4 :Yb 3+ , Er 3+ /mNaYF 4 (m = 0, 1, 2, 3, 4, 5) core-shell nanoparticles are synthesized using a thermal decomposition method. The structure, morphology and fluorescence spectrum of the nanoparticles are confirmed by XRD , TEM and fluorometer. The average size of the as-prepared NaYF 4 :Yb 3+ , Er 3+ /mNaYF 4 cores is about 8 nm while the thickness of the shells varies from 0.5 nm to 8 nm for different m values. With 980 nm excitation, the nanoparticles exhibit distinct emission peaks at 522 nm, 544 nm and 650 nm. It is noticed that an increasing shell thickness enhances their fluorescence intensity . The fluorescence lifetime and quantum yield of obtained multilayer NaYF 4 :Yb 3+ , Er 3+ /mNaYF 4 nanoparticles are also discussed.
研究领域:
纳米材料
·
光子学
·
发光材料
·
光学性质
·
纳米技术
✓ 已验证
DOI
高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2026
·
IF 5.2
Xiaodong Zhang,Lianrong Zhang,Kaiming Chen,Yitao Wang,Lilong Zhang,Linlin Zhang
Lanthanide-doped perovskite nanocrystals (NCs) have emerged as attractive emitters operating at telecommunication wavelengths. Nevertheless, achieving efficient lanthanide incorporation generally demands high synthesis temperatures (>240 °C), which complicates control over NC size and uniformity. In this work, we revealed that by replacing excess Pb 2+ with lanthanide halides, Ostwald ripening was effectively suppressed, resulting in precise size tuning and enhanced doping. This versatile lanthanide halide–mediated strategy yields highly monodisperse Yb/Er-codoped CsPbCl 3 NCs that exhibit a record photoluminescence quantum yield (21.2%) at 1.54 μm among colloidal perovskite systems. A light-emitting diode (PeLED) was fabricated, showing nearly pure 1.54 μm emission, achieving the peak external quantum efficiency (EQE) of 0.464% under low driving voltage of 2.7 V. In conclusion, the development of 1.54-μm Er-PeLEDs presents new prospects for integrated light sources.
✓ 已验证
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
MATERIALS RESEARCH BULLETIN
·
2024
·
IF 5.3
Ronghui Cai,Jianhong Wu,Chunli Guo,Bining Tian
All inorganic double perovskites have been adopted as photo-luminescent hosts due to their high stability, absorption coefficient and carrier mobility. Various photo-luminescent properties are being investigated in double perovskites including infrared emitting, upconverting, afterglowing, temperature sensing and so on. Taking advantage of the Boltzmann distributed energy levels, erbium ions are gifted as spectral temperature sensing centers. Here, we synthesized Er 3+ doped monoclinic Ba 2 SrWO 6 (BSWO) double perovskites and carried out a series of examinations for their upconverting as well as temperature sensing characteristics. Upon 980 and 1550 nm excitation, the upconversion processes are determined by the relationship between emission intensities against excitation powers. The optical temperature sensitivities are evaluated by exploiting fluorescence intensity ratio (FIR) and lifetime, where the maximum values for FIR and lifetime sensitivities are 14.3 × 10 −3 and 2.2 × 10 −3 K −1 respectively, suggesting that Er 3+ doped double perovskites hold great potential for the development of novel optical temperature sensing materials.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
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 RESEARCH BULLETIN
·
2017
·
IF 2.446
Tie Cong,Yadan Ding,Xueqing Yu,Yue Mu,Xia Hong,Yichun Liu
A series of Cd 2+ doped hexagonal-phase NaYF 4 : Yb 3+ , Er 3+ upconversion nanoparticles (UCNPs) were synthesized via solvothermal method, and the effect of Cd 2+ on the upconversion luminescence (UCL) properties was investigated in detail. It was found that the introduction of Cd 2+ could enhance the UCL intensities of NaYF 4 : Yb 3+ , Er 3+ UCNPs significantly. The maximum enhancement occurred when the doping concentration of Cd 2+ was 7 mol%. Compared with the UCNPs without Cd 2+ doping, the total integral emission intensity was enhanced by ∼38 times. It was related to the unit cell expansion and the generated F − vacancies, which could decrease the crystal symmetry around the Er 3+ ions. The results shall facilitate the improvement of UCL properties and the potential applications of UCNPs in lighting, solar cells, optics encoding and so on.
研究领域:
材料科学
·
纳米技术
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Optical Materials Express
·
2016
·Vol. 6
·期 4
·1056-1064
·
IF 2.657
Lili Huo,Jiajia Zhou,Ruozhen Wu,Junfei Ren,Shengjun Zhang,Junjie Zhang,Shiqing Xu
Hexagonal-phase NaYF4: Yb3+, Er3+ nanoparticles (NPs) have been widely used as the most efficient NIR-to-visible upconversion (UC) luminescent and probe in bioscience. Here, we exploited not only the function of dual-mode emission of β-NaYF4: Yb3+, Er3+ NPs in the near infrared (NIR) and visible regions with single wavelength excitation at 980 nm, but also the function of physiological temperature sensing with the luminescence of Er3+ in the visible region. The structural and optical characteristics of β-NaYF4: Yb3+, Er3+ NPs were obtained using X-ray diffraction (XRD), scanning electron microscopy (SEM),and fluorescence spectral measurements, respectively; the mechanism for the energy transfer has been suggested with emphasis on the optimized Er/Yb concentration for most efficient UC. Due to the UC and down-shifting NIR properties, we achieved the dual-functional nanoparticles with potential application in physiological range temperature sensing and bioimaging simultaneously.
研究领域:
生物医学工程
·
纳米技术
·
光学成像
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2023
·
IF 3.8
Xinyu Tian,Qunchao Qi,Bin Hou,Yannan Qian
We exploited a simple hydrothermal route without adding organic additives or hard templates to synthesize cubic-shaped LiNbO 3 :Yb 3+ /Er 3+ with the size of 400–500 nm. Based on the time-dependent investigation on the crystal structure and morphology, Yb(NO 3 ) 3 and Er(NO 3 ) 3 not only could emit green and red upconversion (UC) emission but also could be used as an etchant to increase dissolution rate of the Nb 2 O 5 raw material in the hydrothermal synthesis route. Without addition of Yb 3+ /Er 3+ ions, LiNbO 3 phase could not be formed at even hydrothermal time of 48 h. The time-dependent Raman spectra showed the Raman peaks of LiNbO 3 were occurred at the reaction time of 48 h, and the impurity Nb 2 O 5 phase was disappeared with lengthening hydrothermal time. After calcining at 1050 °C for 2 h, the new Raman peaks at 440/487/531/552 cm −1 and the disappeared OH – absorption peaks at 3429 and 1628 cm −1 favored to produce the bright UC emissions in LiNbO 3 :Yb 3+ /Er 3+ nanocrystals. The pump power dependence and UC mechanism were studied under 980 nm excitation.
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 NANOSCIENCE AND NANOTECHNOLOGY
·
2014
·Vol. 14
·期 5
·3711-3717
·
IF 1.339
Liu Yunxia,Liu Baocang,Xu Guangran,Wang Qin,Hu Wenting,Liu Yang,Jia Wenjing,Liu Yongxin,Zhang Jun
Upconversion luminescent NaYF4:Yb3+, Er3+/Tm3+ nanocrystals were successfully synthesized via a facile and one-pot solvothermal method using oleic acid/oleylamine (OA/OM) as surfactants. The effects of synthetic parameters including rare earth
ion doping concentrations and temperatures on the crystal phase structure, size and shape of NaYF4:Yb3+, Er3+/Tm3+ nanocrystals were systematically investigated. By modulating the synthetic parameters, the shape of NaYF4:Yb3+,
Er3+/Tm3+ nanocrystals were controlled in forms of nanorods and nanowires. The reaction temperature has large effects on the phase structure of NaYF4:Yb3+, Er3+/Tm3+ nanorods, exhibiting a phase transformation from cubic phase
(α-) in low temperatures to hexagonal phase (β-) in high temperatures. Moreover, the upconversion luminescence of NaYF4:Yb3+, Er3+/Tm3+ nanocrystals was found to be dependent on the rare earth ion doping concentrations and
temperatures.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
PubMed
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 31
·26280-26287
·
IF 3.289
Binbin Li,Heng Liu,Chuanbin Sun,Zeeshan Ahmad,Zhaohui Ren,Xiang Li,Gaorong Han
The investigation of nano-carriers with controllable and trackable drug release kinetics has attracted worldwide attention for new tumor theranostic strategies with catabatic side effects. Herein, a range of monodispersed core–shell structured photoluminescent SrTiO3:Yb3+,Er3+@mSiO2 nanoparticles were designed and synthesized. The surfactant cetyltrimethylammonium bromide (CTAB) was used to vary the microstructure of the mesoporous SiO2 shell. The specific surface area and pore volume increase proportionally with the content of CTAB. Consequently, the doxorubicin (DOX) loading capacity increases, and the drug release kinetics possesses a sustained behaviour. More importantly, the DOX release kinetics was found to correspond well to the evolution of the up-conversion luminescence (UCL) phenomenon. More rapid drug release induces more rapid photoluminescence enhancement, and vice versa. This study has therefore been anticipated to suggest another promising multifunctional drug delivery platform for advanced chemotherapies.
研究领域:
纳米医学
·
药物递送系统
·
生物材料
✓ 已验证
DOI
高影响因子
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
危险品化学品经营许可证（带存储）