OPTICAL MATERIALS
·
2023
·
IF 3.9
Jie Chen,Chao Wang,Yu Yin,Rong Liu,Fanxu Meng,Shanshan Wang,Zhigang Liu,Shihua Yu
Intelligent regulation of energy transfer process among different rare earth ions doped in the matrix is an effective strategy to realize high-performance upconversion (UC) luminescence. Based on this, wheat ears like Yb 3+ /Er 3+ /(Tm 3+ , Ho 3+ ) triple doped YF 3 microrods were fabricated via hydrothermal method , and the morphology, crystal structure, UC luminescence performance dependent on Tm 3+ /Ho 3+ doping concentrations were studied. By comparing with the Yb 3+ , Er 3+ co-doped YF 3 microrods, the UC luminescence intensity is enhanced in Yb 3+ /Er 3+ /(Tm 3+ , Ho 3+ ) triple doped YF 3 samples due to the cross relaxation processes between Er 3+ and Tm 3+ /Ho 3+ . Moreover, red emission is enhanced more significantly than green emission in YF 3 : Yb 3+ , Er 3+ , Tm 3+ , which is contrary to that in YF 3 : Yb 3+ , Er 3+ , Ho 3+ . The possible energy transfer upconversion mechanism involved is discussed in detail. Meanwhile, an adjustable emission color is easy to achieve via altering the doped Er 3+ /Tm 3+ /Ho 3+ ion concentration . These studies on the UC luminescence enhancement mechanism of Yb 3+ /Er 3+ /(Tm 3+ , Ho 3+ ) triple doped YF 3 microrods are expected to provide a reference for the development of high-efficiency luminescent materials .
研究领域:
材料科学
·
光学材料
·
光子学
·
稀土掺杂
·
纳米光子学
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DOI
高影响因子
Heliyon
·
2023
·
IF 4
Kai Huang,Feng Jiao Zhao,Wen Qiang Song,Chang Yuan Xu,Hong Ming Yin
Er 3+ has received extensive attention due to its excellent optical properties, especially its emission at 1535 nm in atmospheric propagation window. Enhancement and regulation of 1535 nm emission of Er 3+ is of great significance to optical communication. In this work, growing of CsPbBr 3 QDs has been controlled through adjusting annealing time which would precisely regulate conduction band of CsPbBr 3 QDs to match energy levels of Er 3+ enabling energy transfer between Er 3+ and CsPbBr 3 QDs. By steady-state and transient PL emission and excitation spectroscopy, we reveal multiple energy transfer processes between Er 3+ and CsPbBr 3 QDs under different excitation wavelengths in Er 3+ doped CsPbBr 3 QDs glass: under higher energy excitation (∼378 nm), energy transfer from Er 3+ to CsPbBr 3 QDs and this extra energy within CsPbBr 3 QDs decay via a non-radiative pathway; under lower energy excitation (∼524 nm), energy transfer from conduction band of CsPbBr 3 QDs to 4 S 3/2 energy level of Er 3+ which significantly enhances PL emission of Er 3+ in near infrared region (∼1535 nm, 4 I 13/2 → 4 I 15/2 ). These results provide a facile approach to enhance and regulate PL emission of Er 3+ in near infrared region.
研究领域:
材料科学
·
光子学
·
光学材料
·
纳米技术
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Xing Liu,Jing Li,Yaru Peng,Yuqi Zhang,Xi Chen,Lili Wang,Liangliang Zhang,Li Chen
The upconversion luminescence (UCL) materials have the substantial advantages for deeper penetration and detection in tissue imaging and therapy owing to the dominant UCL wave located within the tissue optical transmission window. However, this application is limited by low red UCL efficiency. In this work, we synthesized Bi 2 O 3 : Yb 3+ /Er 3+ that exhibits intense red UCL under 980 nm excitation, which is about 5 times as that in conventional Y 2 O 3 sample. The red and green UCL intensity ratio is up to 229.6. Moreover, the red UCL can penetrate 8 mm fresh chicken breast tissue. Not only Bi 2 O 3 host exhibits excellent photocatalytic activity, Bi 2 O 3 : Yb 3+ /Er 3+ material also shows enhanced catalytic performance, achieving 91% degradation of methyl orange in 2 h under visible light (VIS). When combined with TiO 2 owned ultraviolet (UV) dominant activity, TiO 2 -modified Bi 2 O 3 : Yb 3+ /Er 3+ retains 96% activity under VIS. Furthermore, the degradation efficiency of Bi 2 O 3 : Yb 3+ /Er 3+ in the near-infrared (NIR) region can also reach 36% within 3 h, implying it is a promising candidate for UV–VIS–NIR broad-spectrum photocatalytic activity. Our study indicates that Bi 2 O 3 : Yb 3+ /Er 3+ is an outstanding multifunctional material that integrate strong red emission with capabilities for deep-tissue imaging and broad-spectrum-responsive photocatalysis.
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DOI
高影响因子
ACS Omega
·
2023
·
IF 4.1
Haoyue Hao,MengYao Zhu,Liang Li
In this paper, Er3+/Yb3+ codoped Y2(1–x%)Lu2x %O3 solid solution was prepared through the sol–gel method, and the substitution of Y3+ by Lu3+ ions in Y2O3 was confirmed by X-ray diffraction data. The up-conversion emissions of samples under 980 nm excitation and the relative up-conversion processes are investigated. The emission shapes do not vary with the change in doping concentration due to the unaltered cubic phase. The red-to-green ratio changes from 2.7 to 7.8 and then declines to 4.4 as the doping concentration of Lu3+ increases from 0 to 100. The emission lifetimes of green and red have similar variation: the emission lifetime decreases with doping concentration changing from 0 to 60 and rises as the doping concentration continues to increase. The reason why the emission ratio and lifetime change could be originated to the exacerbation of cross-relaxing process and the change of radiative transition probabilities. The temperature-dependent fluorescence intensity ratio (FIR) shows that all samples can be used in noncontact optical temperature sensing, and the method of local structure distortion can be used to improve sensitivity further. The max sensing sensitivities of FIR based on R538/563 and Rred/green reach 0.011 K–1 (483 K) and 0.21 K–1 (300 K). The results display that Er3+/Yb3+ codoped Y2(1–x %)Lu2x %O3 solid solution can be potential candidates for optical temperature sensing in different temperature ranges.
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产品关联
DOI
PubMed
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2023
·
IF 3.8
Xiangping Li,Zhipeng Guan,Ziru Liu,Rensheng Shen,Yan Li,Runpu Zhou,Hongquan Yu,Lei Li,Baojiu Chen
In this work, the nitriding method was used to improve the up-conversion (UC) luminescence intensity and temperature sensing sensitivity of phosphor materials. Yb 3 Al 5 O 12 : Er 3+ and partially nitrided Yb 3 Al 5 O 12-1.50 x N x : Er 3+ phosphors by using AlN as nitrogen source were prepared via solid-state reaction method. The influence of nitridation on the UC luminescence and temperature sensing properties of Yb 3 Al 5 O 12 : Er 3+ phosphors upon 980 nm excitation were discussed. Almost pure red UC emission was obtained, and the intensity of the red UC emission of the samples was enhanced by 25 % after nitridation. Meanwhile, the absolute temperature sensitivity respectively derived from the intensity ratios of the green and red emissions increased by 5 % and 50 % after nitridation. Judd-Ofelt theory was utilized to analyze the change of the crystal field environment around Er 3+ and confirmed that the introduction of N 3– reduced the symmetry around Er 3+ and strengthened the covalence between Er 3+ and ligands, which may result in the enhancement of UC emission intensity and temperature sensing sensitivity. The experiment proved that Yb 3 Al 5 O 12 : Er 3+ red UC phosphors had potential application in luminescence imaging and temperature sensors.
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DOI
高影响因子
OPTICAL MATERIALS
·
2023
·
IF 3.9
Xiandi Yu,Qianshu Xia,Peng Liu,Yan Xu
Lanthanide-doped upconversion (UC) nanomaterials with zero background auto-fluorescence are of extensive interest in optical fields. Here, a NaYF 4 :Yb 3+ /Er 3+ @Zr-UiO-66 nanostructure was prepared by simultaneously encapsulating NaYF 4 :Yb 3+ /Er 3+ nanoparticles (NPs) and promoting the nucleation of UiO-66 under solvothermal condition. Traditional nanosize-surface induced defects and grain boundaries of NaYF 4 :Yb 3+ /Er 3+ upconversion nanoparticles (UCNPs) were greatly minimized; enabling a highly efficient energy transfer confirmed by the prolonged fluorescence lifetime and enhanced UC emission of NaYF 4 :Yb 3+ /Er 3+ @Zr-UiO-66 nanocomposite. The optical thermometry property of nanocomposite was investigated based on the fluorescence intensity ratio (FIR) technique in the temperature range of 303–393 K. The maximum relative temperature sensitivities (S r ) were calculated to be 1.02 and 0.73% K −1 based on a pair of thermally coupled energy levels (TCLs) of ( 2 H 11/2 → 4 I 15/2 , 4 S 3/2 → 4 I 15/2 ) and another pair of non-thermally coupled energy levels (NTCLs) of ( 2 H 11/2 → 4 I 15/2 , 4 F 9/2 → 4 I 15/2 ), respectively. Besides, it exhibited effective internal optical heating property due to the thermal excitation between the two adjacent TCLs of 2 H 11/2 and 4 S 3/2 in NaYF 4 :Yb 3+ /Er 3+ UCNPs as heated by increasing the laser power. This work demonstrates a feasible confined synthesis of NaYF 4 :Yb 3+ /Er 3+ @Zr-UiO-66 nanocomposite with extreme UC emitting performance, and it holds great potential acting as both ratiometric thermometer and optical heater for multifunctional applications.
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Haoqiang Zhang,Hong Wei,Liang Xu,Yongjin Li,Zhiguo Song,Dacheng Zhou,Qi Wang,Zhangwen Long,Yong Yang,Yugeng Wen,Jin Han,Yuan Gao,Jianbei Qiu
It has been challenging to develop lanthanides doped chiral inorganic materials that emit circularly polarized light by upconversion. Here, we report the synthesis of bismuth oxychloride based inorganic nanostructured phosphor co-doped with Er 3+ , Yb 3+ , modified with chiral sugar alcohols (D-BYE), which exhibited a strong up-conversion circularly polarized luminescence (UC-CPL) property in the visible range. Compared with the achiral bismuth oxychloride phosphor co-doped with Er 3+ , Yb 3+ (A-BYE), D-BYE significantly improved the intensity of upconversion luminescence. Our studies showed that an accelerated rate of radiative transition induced by electromagnetic field and the Mie scattering effect may be responsible for the enhanced upconversion luminescence. Our works provide a new strategy to realize enhanced upconversion of circularly polarized luminescence with rare earth doped chiral inorganic materials.
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DOI
高影响因子
LANGMUIR
·
2022
·
IF 4.331
Peng Du,Laihui Luo,Di Wang,Weiping Li,Dandan Wang,Zhihong Mai,Ye Wang,Weiguang Ran,Guozhong Xing
To settle the unsatisfying efficiency and insufficient light harvesting ability of photocatalysts, we report on the development of Er3+/Yb3+-codoped BiOBr (BiOBr:Er3+/xYb3+) microparticles that were synthesized by a rational high-temperature solid-state reaction method. The prepared microcrystals exhibit high visible upconversion (UC) emissions with maximum intensities at x = 0.01 when excited by a 980 nm laser. Remarkably, the corresponding UC emission process is attributed to a two-photon absorption route. Furthermore, the photocatalytic activities of as-synthesized compounds were further evaluated through analyzing the visible–near-infrared light-triggered tetracycline degradation. Compared with BiOBr:Er3+ microparticles, BiOBr:Er3+/xYb3+ microparticles present superior photocatalytic properties and the optimal status is achieved when x = 0.05, in which h+, ·O2–, and ·OH active species contribute to the photocatalytic mechanism. Additionally, the designed microparticles exhibit better photocatalytic abilities than previously reported photocatalysts (i.e., TiO2, SnO2) upon full-spectrum light irradiation. These results reveal that Yb3+ codoping is able to not only enhance the UC emission properties of BiOBr:Er3+ microparticles but also reinforce their photocatalytic activities. Our findings may put forward a facile strategy to regulate the photodegradation capacity of photcatalysts.
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DOI
PubMed
高影响因子
JOURNAL OF LUMINESCENCE
·
2022
·
IF 4.171
Hongli Wen,Zhurong Mo,Chonge Ta,Zhongfei Mu,E.A. Dawi,Ming Sun,Gao Cheng,Lin Yu,Deshmukh Abdul Hakeem
Na 0.90- y AlSiO 4 :0.1Er 3+ , y Yb 3+ (0 ≤ y ≤ 0.007) phosphors were prepared by the solid state reaction method and their dual mode multicolor luminescence properties were systematically investigated. The phosphors were crystallized into the carnegieite polymorph of NaAlSiO 4 at 1300 °C. The synthesized phosphors were characterized by using powder XRD technique, FT-IR and UV-VIS-NIR diffuse reflectance spectra. Upon 380 nm excitation, the phosphors emitted visible and NIR downconversion emission, which follows the quantum cutting process. The upconversion emission spectra , irrespective of the laser excitation wavelength (980 nm, 808 nm, or 1550 nm), show characteristics sharp green, and red emissions, from 2 H 11/2 → 4 I 15/2 , 4 S 3/2 → 4 I 15/2 , and 4 F 9/2 → 4 I 15/2 transitions of Er 3+ , respectively. Intense green (552 nm), red (664 nm) and NIR (809 nm) emissions were observed at 980, 808 and 1550 nm laser excitation, respectively. The dual mode emission of the Na 0.90- y AlSiO 4 :0.1Er 3+ , y Yb 3+ (0 ≤ y ≤ 0.007) phosphors is enhanced upon Yb 3+ co-doping. By analyzing the dependence of upconversion emission intensities on the laser excitation power, a possible upconversion emission mechanism is proposed.
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高影响因子
JOURNAL OF NON-CRYSTALLINE SOLIDS
·
2022
·
IF 4.458
Yichen Ye,Yongbao Xiao,Yao Ji,Weichao Wang
Tellurite-based glass composed of TeO 2 -Ta 2 O 5 -ZnO (labeled as TTZ) is explored as the host material for a potential 2.7 μm fiber laser. It is found that the glass-forming region, structural and physical properties of TTZ glass undergo considerable changes when platinum crucible are adopted to prepare glass instead of alumina one. Especially, the Er 3+ -doped TTZ glass that melted in platinum crucible exhibits relatively larger absorption and emission cross-sections at 2.7 μm than that of alumina one. Further studies show that an enhanced 2.7 μm luminescence can be achieved from the heavily Er 3+ -doped TTZ glass, the absorption and emission cross-sections, figure of merit and maximum gain coefficient of Er 3+ -doped TTZ-Pt glasses at 2.7 μm are calculated to be 0.91 × 10 −20 and 1.01 × 10 −20 cm 2 , 3.18 × 10 −24 cm 2 ·s and 2.25 cm −1 , respectively, indicating that the Er 3+ -doped TTZ glass may be a promising candidate host for mid-infrared fiber lasers.
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DOI
高影响因子
NANO
·
2022
·
IF 1.438
Sisi Shi,Hongchao Geng,Leilei Sun,Yao Huang,Qingyun Cai
A turn-on fluorometric probe is designed for the determination of ascorbic acid (AA) based on the inner filter effect (IFE) between CaF 2 : Yb 3 + , Er 3 + upconversion nanoparticles (CaF 2 : Yb 3 + , Er 3 + NPs) and the oxidized 3, 3 ′ , 5, 5 ′ -tetramethylbenzidine (oxTMB). The colorless TMB can be oxidized by H 2 O 2 / Cu 2 + to blue oxTMB. Under 980 nm photoexcitation, CaF 2 : Yb 3 + , Er 3 + NPs can emit red light, which can be absorbed by the blue oxTMB, leading to the fluorescence quenching at 657 nm. As AA can reduce the blue oxTMB to colorless TMB, the fluorescence at 657 nm can be recovered with the addition of AA, which can accomplish the detection towards AA. The linear detection range of AA is from 1 to 30 μ M, and the limit of detection (LOD) of AA is 0.1 μ M.
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高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 5
·728
·
IF 5.719
Wei Zhang,Yang Zang,Yanli Lu,Jinghui Han,Qingyun Xiong,Jinping Xiong
In this study. a novel near-infrared fluorescent-driven contrast agent (Ag-doped NaYF4:Yb3+/Er3+@NaYF4:Nd3+@NaGdF4) was synthesized using a coprecipitation-hydrothermal-solvothermal-solvothermal (CHSS) method. The results shows that hexagonal NaYF4:Yb3+/Er3+with a diameter of 300 nm was successfully synthesized by the CHSS method. The new contrast agent was characterized using scanning electron microscopy, fluorescence spectrometry, transmission electron microscopy, energy-dispersive spectrometry and ultraviolet-visible light diffuse reflectance absorption spectroscopy. Even at low concentrations (0.2 M), this proposed contrast agent can be excited by near-infrared light with a wavelength of 980 nm and emits a dazzling green light with a wavelength of 540 nm, and the comparison of the luminescence intensity proves that doping with silver increases the luminescence intensity of the upconverted nanomaterial by nearly 13 times based on the calculated quantum yield. TEM images show the successful preparation of silver nanoparticles with a diameter of 30 nm, and the energy spectrum shows the successful doping of silver nanoparticles and the successful preparation of the core-shell structure of NaYF4:Yb3+/Er3+@NaYF4:Nd3+@NaGdF4. Furthermore, the mechanism of the increased luminous intensity has been studied using simulation calculations. Finally, cytotoxicity tests were used to test material which was modified by 1,2-distearoyl-sn-glycero-3-phosphoethanolamine-N-[amino(polyethylene glycol)-2000] (DSPE-PEG2K), and the biocompatibility was significantly improved, meeting the standard for biological applications.Keywords:upconversion;near-infrared;intensity;in vivo imaging
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PubMed
高影响因子
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