JOURNAL OF LUMINESCENCE
·
2022
·
IF 4.171
Shuopan Dun,Siqi Zhang,Xugeng Guo,Jinglai Zhang
Introducing upconversion nanoparticles (UCNPs) onto photoanode films is an effective way to enhance the photovoltaic performance of dye-sensitized solar cells (DSSCs). In this contribution, the β -NaYGdF 4 :Yb, Er UCNPs and β -NaYGdF 4 :Yb,Er@SiO 2 nanoparticles (NPs) were prepared by tuning the dopant contents of the Gd ions and the β -NaYGdF 4 :Yb,Er@SiO 2 NPs were applied as an upconverting layer in DSSCs. Upconversion photoluminescence indicates that the UCNPs doped with 5% Gd ions exhibit the strongest green and red fluorescence emissions . Moreover, the DSSCs device incorporating the NPs with 5% Gd ion dopant can achieve an optimal photovoltaic efficiency of 5.89%, which is 20.20% enhancement in comparison to the device without NPs and 16.17% increasement with respect to the device containing β -NaYF 4 :Yb,Er@SiO 2 nanocrystals , thus highlighting the effect of the doping of the Gd ions in nanoparticles on their upconversion photoluminescence and photoelectric performance. Accordingly, the current results offer a feasible strategy for further regulating the photoluminescence property of UCNPs and optimizing the photovoltaic performance of UCNPs-based DSSCs devices.
研究领域:
材料科学
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纳米技术
·
太阳能
·
光电
✓ 已验证
产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2021
·Vol. 23
·期 21
·3892-3900
·
IF 3.545
Dandan Ju,Xiaoli Gao,Shouchao Zhang,Yang Li,Wenjing Cui,Yinhui Yang,Mingyan Luo,Shujing Liu
Temperature is one of the physical parameters that affects the emission luminescence properties of upconversion (UC) materials. Temperature-dependent emission color tuning and good temperature sensitivity in multifunctional β-NaYF4:Yb/Er@β-NaYF4:Yb/Tm microcrystals were achieved under 980 nm excitation. Based on the different emission bands (blue, green and red bands) and spectral sensitivities of the core–shell structured microcrystals to temperature, intense white-light emission was obtained at room temperature and a real-time naked-eye recognizable emission color change from white to the purplish-pink region was realized with the temperature increasing from 300 to 500 K. Furthermore, optical temperature sensing properties of the sample with good sensitivity (from 0.0034 to 0.0044 K−1) were investigated by using a fluorescence intensity ratio between 521 nm (2H11/2 → 4I15/2 transition) and 540 nm (4S3/2 → 4I15/2 transition) in the temperature range from 300 to 500 K. The results indicate that the sample has high sensitivity in a relatively wide range of temperature intervals, especially in the low temperature region. We believe that the multifunctional core–shell structured microcrystals exhibit promising applications in white-light emitting diodes, the anti-counterfeiting field, and temperature sensing.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Analytical Methods
·
2017
·Vol. 9
·期 20
·2977-2982
·
IF 1.9
Yuanhui Ma,Liping Zhang,Lei Wang,Lun Wang,Hongqi Chen
A novel surface plasmon resonance (SPR) enhanced upconversion (UC) luminescence system was designed for the detection of α-fetoprotein (AFP) by using gold nanoparticle (NP) coated NaYF4:Yb,Er,Gd upconversion nanoparticles (UCNPs) as probes. The gold NP coated NaYF4:Yb,Er,Gd UCNPs had a strong emission at 665 nm and were modified with poly(acrylic acid) (PAA) before being conjugated with anti-AFP (Ab1). When the AFP antigens were added to the system, the binding affinity between AFP and Ab1 resulted in a reduced distance between the gold NP coated UCNPs. The UC luminescence intensity of this system was enhanced because of the SPR properties of the gold NPs. The sensing system exhibited a high sensitivity, good specificity, and wide linear range, 0.098–15.0 ng mL−1 for the detection of AFP (R = 0.99), with a detection limit as low as 0.095 ng mL−1 under optimal conditions. The method was successfully applied to AFP sensing in human serum samples.
研究领域:
生物医学工程
·
分析化学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Chemistry-An Asian Journal
·
2022
·Vol. 17
·期 14
·e202200161
·
IF 4.839
Bo Ling,Yaguang Wang,Ruo Mi,Di Wang,Hongqi Chen,Xiaohu Li,Ye Zhang,Lun Wang
Graphical NaGdF 4 ,Yb,Er@NaGdF 4 ,Yb,Tm@NaYF 4 core@shell@shell three-layer structure of upconversion nanoparticles coated with Fe−TCPP metal-organic frameworks nanocomposite was designed and constructed for multimodal imaging and synergetic chemodynamic therapy/photodynamic therapy of tumors. Here, NaGdF 4 ,Yb,Er@NaGdF 4 ,Yb,Tm@NaYF 4 core@shell@shell three-layer structure of upconversion nanoparticles (UCNPs) coated with Fe−Tetrakis (4-carboxyphenyl) porphine (TCPP) metal-organic frameworks (Fe-MOFs) nanocomposite (UCNPs@MOFs) was designed and constructed for multimodal imaging and synergetic chemodynamic therapy (CDT)/photodynamic therapy (PDT) of tumors. The UCNPs@MOFs were successfully applied for tumor cells imaging in vitro and in vivo in near-infrared (NIR) region. The doped Gd was used as contrast agent for the magnetic resonance imaging (MRI) of mouse tumors. The luminescence in the UV-vis region was absorbed by the Fe-MOFs to produce singlet oxygen ( 1 O 2 ) for PDT. The Fe 3+ doped in the MOFs can catalyze H 2 O 2 to produce oxygen and hydroxyl radical (⋅OH). Hydroxyl radical is used in CDT and cooperates with the 1 O 2 of PDT. Based on the CDT/PDT synergistic effects, the UCNPs@MOFs nanocomposite had obviously enhanced tumor inhibitory efficiency in vivo. These results described that the asprared UCNPs@MOFs nanocomposite have great potential in the effective multimodal imaging and treatment of tumors.
研究领域:
生物医学工程
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纳米医学
·
肿瘤学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF LUMINESCENCE
·
2024
·
IF 3.3
Wei Zhou
This paper focuses on the study of core-shell rare earth NaLuF 4 :Yb,Er@NaLuF 4 :Yb,Tm@NaLuF 4 upconversion nanoparticles (UCNPs) with multispectral emission for applications in the field of ratiometric temperature sensors. This approach lays the foundation for exploring more luminous intensity ratios (LIRs) between different spectra for temperature sensing. Additionally, it facilitates the use of different LIRs for various temperatures, yielding higher sensitivity. Under 980 nm laser excitation, these UCNPs produce multispectral luminescence covering blue, green, red, and infrared luminescence intervals. Within the temperature range of 293–473 K, we measured the luminescence intensity of different emission peaks and observed that the 803 nm peak exhibits an anomalous thermal enhancement effect. The LIR between the luminescence intensities of different emission peaks is fitted using formulas to calculate the absolute sensitivity ( S a ), relative sensitivity ( S r ), uncertainty ( ΔT ), and repeatability ( R ) of the corresponding LIR. Comparisons revealed that LIR(I 803 /I 540 ) demonstrates greater S a compared to the other LIRs. Furthermore, the S r of LIR(I 803 /I 540 ) is higher in the elevated temperature range, whereas LIR(I 522 /I 540 ) shows greater values in the lower temperature range. By combining the advantages of these two LIRs at different temperatures, LIR(I 522 /I 540 ) is utilized at low temperatures and LIR(I 803 /I 540 ) at high temperatures, achieving a combined S r of 0.67–1.06 %K −1 and a combined ΔT of less than 0.045. The R of LIR(I 803 /I 540 ) is tested and found to be greater than 99 % averaged over five cycles. In summary, the NaLuF 4 :Yb,Er@NaLuF 4 :Yb,Tm@NaLuF 4 UCNPs proposed in this paper demonstrate potential applications in the field of temperature sensing.
研究领域:
材料科学
·
光学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2026
·Vol. 37
·期 15
·1145
·
IF 3.2
Mao Tan,Wang Wei,Liu Peilong,Zha Junyan,Bu Xiran,Song Rui,Luo Xueke
To overcome the intrinsic limitations of TiO 2 , specifically its wide band gap and rapid photogenerated carrier recombination, for dyeing wastewater treatment, a Yb 3+ /Er 3+ co-doped TiO 2 -ZnO heterostructure was fabricated by sol–gel method. X-ray diffraction revealed inhibited anatase-to-rutile phase transition. X-ray photoelectron spectroscopy confirmed Ti 2p binding energy shifts, indicating strong electronic interactions between dopants and the host lattice. Ultraviolet–visible diffuse reflectance spectroscopy showed band gap narrowing to 2.927 eV, with upconversion effect extending light absorption to the near-infrared region. Photoluminescence measurements demonstrated suppressed carrier recombination, and XPS confirmed abundant oxygen vacancies. The optimal sample achieved 74.31% methylene blue degradation under visible light for 6 h and 98.58% under ultraviolet light for 2 h, outperforming commercial P25. The Yb 3+ /Er 3+ co-dopants serve dual functions: they act as upconversion centers to harvest low-energy photons and function as electronic modulators that induce Ti 2p binding energy shifts and create oxygen vacancies, thereby enhancing charge separation and surface reactivity. This work integrates rare-earth co-doping with heterojunction engineering to boost TiO 2 photocatalysis.
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2026
·Vol. 18
·期 30
·41290-41310
·
IF 7.8
Weng Tianfeng,Lamon Simone,Gan Zongsong,Gu Min,Zhang Qiming
All-optical data encoding provides a route to ultrafast, low-energy photonic memory and computation, yet its implementation is hindered by weak nonlinearities and low emission efficiencies in conventional materials. Upconversion luminescence offers strong nonlinear behavior, but typical hosts suffer from inefficient energy transfer, dilute and randomly distributed dopants, and complex excitation demands. Here, we report thermally crystallized BaYF 5 :Yb,Er glass-ceramics that overcome low upconversion efficiency and dopant inhomogeneity through controlled Er 3+ enrichment within BaYF 5 nanocrystals. Thermal crystallization reduces interionic distances, promoting cooperative Yb 3+ –Er 3+ sensitization and Er 3+ –Er 3+ energy migration. The combination of theoretical modeling and experiments shows efficient population of high-energy emitting states, yielding ultrabright upconversion emission with enhancement factors of 113-, 118-, and 110-fold for the blue, green, and red channels under 980 nm excitation. Optimized nanocrystals also prolong emission lifetimes, suppress nonradiative relaxation, and produce clear saturation behavior. Leveraging strongly nonlinear responses, power- and pulse-width-modulated excitation enables precise control of both spectral and temporal outputs, forming a highly reconfigurable platform. This allows multidimensional data encoding and implementation of fundamental optical logic gates with high fidelity and self-referenced decoding. The system offers robust, secure, and scalable functionality for advanced all-optical information processing applications.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2019
·
IF 3.261
Zhengquan Liu,Lan Yang,Min Chen,Quansheng Chen
In this work, a label-free fluorimetric method for sensitive and selective detection of Cr(III) was developed by utilizing NaY/GdF 4 :Yb,Er upconversion nanoparticles (UCNPs) and citrate-modified silver nanoparticles (Cit-AgNPs) mixed system. The photophysical and morphological properties of the prepared UCNPs were characterized by various spectroscopic and microscopic techniques. The fluorescence of amino-modified UCNPs can be quenched due to the Cr(III) induced aggregation of Cit-AgNPs by means of inner filter effect. The observed quenching in the fluorescence intensity of the UCNPs is found to be dependent on the concentration of Cr(III). The fluorescence decreases linearly within the investigated concentration of 0.5–40 μM Cr(III) with a limit of detection 34 nM. The practical applicability of the present sensing method is ascertained by detecting Cr(III) in spiked tap water and instant tea samples.
研究领域:
分析化学
·
纳米技术
·
环境科学
✓ 已验证
DOI
高影响因子
Nanoscale
·
2017
·Vol. 10
·期 6
·2834-2840
·
IF 7.367
Bin Zhou,Bing Xu,Huimei He,Zhanjun Gu,Bing Tang,Ying Ma,Tianyou Zhai
We report the enhancement of green upconversion luminescence in tetrahedral LiYF4:Yb/Er nanoparticles by Mn2+ ion doping, which is different from the enhanced single-band red emission dominated by Mn2+ ions in cubic NaLnF4:Yb/Er (Ln = Y, Gd, Lu) nanoparticles. The energy levels of the first excited state 4T1 of Mn2+ in tetrahedral LiYF4:Gd and cubic NaGd(Y)F4 are compared by detection of emissions from Mn2+via the energy transition from Gd3+ to Mn2+ with excitation at 275 nm. The coordination environments of Mn2+ in these two host lattices have been investigated by X-ray absorption fine structure measurements. The results demonstrate that the formation of tetrahedral MnF4 in tetragonal LiYF4 arising from the replacement of Ln3+ ions with Mn2+ ions leads to a higher energy level of the Mn2+ 4T1 state than that in octahedral MnF6 in cubic NaYF4. The high-lying excited state of tetrahedral MnF4 is close to the green emitting 4S3/2 state of Er3+ and thus enhances green upconversion emission in tetragonal LiYF4:Yb/Er, while the low-lying excited state of octahedral MnF6 dominates red emission in cubic NaYF4:Yb/Er. These findings provide direct evidence for the key roles of the host lattices and more possibilities in modulating the upconversion behaviour of lanthanide-based nanoparticles by transition-metal ion doping to achieve the desired goals of specific applications.
研究领域:
材料科学
·
光学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2016
·
IF 4.758
Linlin Zhao,Juan Li,Yuhong Liu,Yuan Wei,Jin Zhang,Jinzha Zhang,Qing Xia,Qiang Zhang,Wenbo Zhao,Xiaoqiang Chen
We reported a novel ECL immunosensor for detection of carcinoembryonic antigen (CEA) based on the reduced graphene Oxide-BaYF 5 :Yb, Er (rGO-BaYF 5 :Yb, Er) nanocomposites. The rGO-BaYF 5 :Yb, Er nanocomposites, used as electrode luminescence materials, were prepared by in situ hydrothermal method, and characterized by TEM, XRD, UV–vis spectra, and upconversion fluorescence spectra. Further, poly (diallyldimethylammonium chloride) (PDDA), Au nanoparticles (AuNPs), and Anti-CEA were successively assembled on the surface of rGO-BaYF 5 :Yb, Er nanocomposites modified-electrode for fabricating ECL immunosensor. The results of the ECL measurements of CEA indicated that this novel ECL immunosensor exhibited high sensitive response to CEA in a linear range of 0.001–80 ng mL −1 with a low detection limit of 0.87 pg mL −1 , good selectivity and satisfactory stability.
研究领域:
生物医学工程
·
分析化学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2016
·Vol. 45
·期 27
·11129-11136
·
IF 4.177
Yue Su,Xiuling Liu,Pengpeng Lei,Xia Xu,Lile Dong,Xianmin Guo,Xingxu Yan,Peng Wang,Shuyan Song,Jing Feng,Hongjie Zhang
Core–shell–shell heterostructures of α-NaLuF4:Yb/Er@NaLuF4:Yb@MF2 (M = Ca, Sr, Ba) have been successfully fabricated via the thermal decomposition method. Upconversion nanoparticles (UCNPs) were characterized by powder X-ray diffraction (XRD), transmission electron microscopy (TEM), upconversion luminescence (UCL) spectroscopy, etc. Under 980 nm excitation, the emission intensities of the UCNPs are remarkably enhanced after coating the MF2 (M = Ca, Sr, and Ba) shell. Among these samples, CaF2 coated UCNPs show the strongest overall emission, while BaF2 coated UCNPs exhibit the longest lifetime. These results demonstrate that alkaline earth metal fluorides are ideal materials to improve the UCL properties. Meanwhile, although the lattice mismatch between the ternary NaREF4 core and the binary MF2 (M = Sr and Ba) shell is relatively large, the successfully synthesized NaLuF4:Yb/Er@NaLuF4:Yb@MF2 indicates a new outlook on the fabrication of heterostructural core–shell UCNPs.
研究领域:
材料科学
·
光学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Analytical Methods
·
2017
·Vol. 9
·期 22
·3296-3301
·
IF 1.9
Lei Wang,Yuan Ji,Yuezhen He,Lun Wang,Hongqi Chen
Li+-Doped NaYF4:Yb,Er upconversion luminescent nanoparticles (UCLNPs) were synthesized and modified with poly(acrylic acid) (PAA). The luminescence of the carboxyl-functionalized UCLNPs at 664 nm was quenched in the presence of cupric ions (Cu2+) due to the coordination of Cu2+ with the carboxyl group of PAA. When pyrophosphate ions (PPi) were added, the luminescence of the UCLNPs was restored due to the competitive binding of PPi with Cu2+. However, pyrophosphatase (PPase) could promote the hydrolysis of PPi, thus releasing Cu2+, leading to requenching of the luminescence. Under optimal conditions, the luminescence response was virtually proportional to the activity of the PPase between 0.500 and 50.0 mU mL−1, and the limit of detection was 0.441 mU mL−1. Based on the competition assay approach, a new highly sensitive method in the red region for real-time detection of PPase activity was developed.
研究领域:
分析化学
·
生物化学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）