JOURNAL OF SOLID STATE CHEMISTRY
·
2025
·
IF 3.5
Daobin Zhu,Junshan Hu,Yuxiang Wu,Keyu Guo,Changchun Ding,Rangrang Fan,Chunfeng Dong,Wei Jin,Yongtao Liu
Er 3+ ions and Yb 3+ ions co-doped indium oxide (In 2 O 3 ) phosphors were successfully synthesized by high temperature solid phase method. At 980 nm laser excitation, the phosphor has weak 552 nm green and strong 661 nm red emission bands. And the upconversion luminescence (UCL) intensity of red light is significantly stronger than that of green light. They are attributed to the 4 S 3/2 → 4 I 15/2 and 4 F 9/2 → 4 I 15/2 transitions of Er 3+ , respectively. And the optimal sample is In 2 O 3 : 4 % Er 3+ , 10 % Yb 3+ . The appearance of phosphor was observed by field emission scanning electron microscopy. The UCL of phosphor is a two-photon process based on power dependence. In addition, photoluminescence excitation spectra and down-conversion luminescence spectra are used to explain the luminescence mechanism. The temperature sensing property of the phosphor in the temperature range of 348 K–598 K were tested. The sensitivity were obtained by fluorescence intensity ratio ( FIR ). The fit degree of FIR is 0.9936. It achieves a maximum relative sensitivity of 0.73 % K −1 at 348 K and a maximum absolute sensitivity of 0.039 K −1 at 373 K. In 2 O 3 : Er 3+ , Yb 3+ phosphors with high quality luminescence and excellent sensitivity have important application value in non-contact temperature measurement.
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 MATERIALS SCIENCE & TECHNOLOGY
·
2024
·
IF 11.2
Hong-Lan Liu,Lin-Lin Zhu,Wei-Ming Guo,Hua-Tay Lin
The highly transparent novel high-entropy (Lu 0.2 Y 0.2 Gd 0.2 Yb 0.2 Er 0.2 ) 2 O 3 ceramic was successfully fabricated by the addition of 3 at.% ZrO 2 and 10 at.% La 2 O 3 introduced as sintering additives via vacuum sintering. A single-phase solid solution cubic structure of the ceramic was obtained with a relative density of 99.95 % and an average grain size of 6.91±3.28 µm. The grain boundary of the (Lu 0.2 Y 0.2 Gd 0.2 Yb 0.2 Er 0.2 ) 2 O 3 ceramic was clean with a thickness of only 1.3 nm. Further observations revealed uniform distribution of all elements in the grains, and the presence of La and Zr segregation (1.5 nm thick) at few grain boundaries, but causing very little light scattering. The in-line transmittance of high-entropy (Lu 0.2 Y 0.2 Gd 0.2 Yb 0.2 Er 0.2 ) 2 O 3 ceramic reached 80 % at 1100 nm, which was 98.7 % of the theoretical value of Er 2 O 3 single crystal. Also, there were fluorescence emissions observed in the ultraviolet (311 nm), visible (563, 622 nm), and near-infrared (1032, 1535 nm) regions. In addition, the intense red emission and weak green emission were detected, and the broad emission with a peak at 1.5 μm was attributed to Stark splitting of Er 3+ ions, so the corresponding mechanism was discussed. Results obtained suggest that the highly transparent novel high-entropy (Lu 0.2 Y 0.2 Gd 0.2 Yb 0.2 Er 0.2 ) 2 O 3 ceramic fabricated in this study could have broad application prospects in optical applications such as scintillators, up-conversion luminescent materials, and infrared lasers.
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
JOURNAL OF LUMINESCENCE
·
2017
·
IF 2.686
Zayakhuu Gerelkhuu,Bui The Huy,Jong Won Chung,The-Long Phan,Eric Conte,Yong-Ill Lee
Upconversion phosphors can convert near-infrared light into visible emission by sequentially absorbing multiple photons. In most studies, Yb 3+ /Er 3+ , Yb 3+ /Tm 3+ ions are used as sensitizer/activator in host materials. In this work, we introduce chromium (Cr 3+ ) ions to NaLu 0.86-x Gd 0.12 F 4 :Cr x 3+ Er 0.02 3+ (UCCr) material that is instead of ytterbium (Yb 3+ ) ions. The UCCr material with a different concentration of Cr 3+ ions (0≤x≤0.24) was synthesized by a facile hydrothermal synthesis method. The characterization of the developed UCCr material was performed by photoluminescence (PL), Field emission scanning electron microscope (FE-SEM), X-ray diffraction (XRD) and Electron paramagnetic resonance (EPR). The effect of Cr 3+ ions on the upconversion luminescence and magnetic-resonant properties of UCCr material was investigated in detail. The upconversion mechanism was proposed.
研究领域:
材料科学
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光学
·
磁学
✓ 已验证
产品关联
DOI
高影响因子
Frontiers in Chemistry
·
2021
·
IF 5.221
Feng Qilong,Zheng Wenjing,Pu Jie,Chen Qiaoli,Shao Wei
The availability of colloidal nano-materials with high efficiency, stability, and non-toxicity in the near infrared-II range is beneficial for biological diagnosis and therapy. Rare earth doped nanoparticles are ideal luminescent agents for bio-applications in the near infrared-II range due to the abundant energy level distribution. Among them, both excitation and emission range of Er3+ ions can be tuned into second biological window range. Herein, we report the synthesis of ∼15 nm LiYF4, NaYF4, and NaGdF4 nanoparticles doped with Er3+ ions and their core-shell structures. The luminescent properties are compared, showing that Er3+ ions with single-doped LiYF4 and NaYF4 nanoparticles generate stronger luminescence than Er3+ ions with doped NaGdF4, despite the difference in relative intensity at different regions. By epitaxial growth an inert homogeneous protective layer, the surface luminescence of the core-shell structure is further enhanced by about 5.1 times, 6.5 times, and 167.7 times for LiYF4, NaYF4, and NaGdF4, respectively. The excellent luminescence in both visible and NIR range of these core-shell nanoparticles makes them potential candidate for bio-applications.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2016
·Vol. 4
·期 40
·9598-9607
·
IF 5.066
M. Wu,X. F. Jiang,E. H. Song,J. Su,Z. T. Chen,W. B. Dai,S. Ye,Q. Y. Zhang
Successful upconversion (UC) tuning from multi-bands to one single red band from Er3+ ions was realized in cubic perovskite ABF3:Yb3+/Er3+ (A = K, Cs; B = Zn, Cd) through Mn2+ doping. Based on UC emission spectra and decay kinetics of KZnF3:Yb3+/Er3+ with different Mn2+ contents, a bidirectional energy transfer process between Mn2+ and Er3+ ions was confirmed to explain the UC tuning mechanism. More importantly, we studied the influence of the Mn2+ energy level position on the UC properties for Er3+ in ABF3 hosts. Interestingly, great enhancement of green UC emissions was observed for Er3+ ions in KCdF3 and CsCdF3 hosts upon Mn2+ doping. Comparison of UC emissions and lifetimes of Er3+ ions in the three materials was carried out to probe the different UC processes in ABF3 (A = K, Cs; B = Zn, Cd) hosts. The different energy transfer mechanism between Mn2+ and Er3+, which is affected by the Mn2+ energy level position, was proposed to explain the UC difference in the three matrices. This research convincingly confirmed the occurrence of energy transfer between Er3+ and Mn2+ ions and provided deep insights into the importance of the Mn2+ energy level position in tuning the UC properties of Er3+ in diverse hosts, while allowing us to better control the UC properties through Mn2+ doping.
研究领域:
材料科学
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光学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
PHYSICA B-CONDENSED MATTER
·
2018
·
IF 1.453
Wenbo Peng,Tao Pang
In this paper, Y 2 Mo 4 O 15 :Yb 3+ /Er 3+ upconversion phosphors are prepared by a co-precipitation method. In the case of 20% Yb 3+ doping, the intense green upconversion luminescence is obtained, which can be attributed to the energy transfer from Yb 3+ -MoO 4 2- dimer to Er 3+ that suppresses the multi-phonon relaxation of 4 I 11/2 to 4 I 13/2 . Similar the Yb 3+ sensitization, the dimer sensitization is also dependent on the Yb 3+ concentration. When the Yb 3+ concentration exceeds 20%, the luminescence is quenched by the cross relaxation and energy migration between dimers. A method for evaluating the reliability of temperature measurement standards is reported. Moreover, in term of the reliable temperature scale, the maximum absolute sensitivity of sample doped with 20% Yb 3+ is determined to be 0.0117 K -1 . Favorable sensing ability and strong upconversion luminescence indicate that the optimum sample is potentially applicable as the optical thermometric materials.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Mingrun Du,Yuhan Xiao,Xuelian Yang,Yu Ma,Yingdong Han,Zepeng Li,Tong Wei,Yunling Zou
In this work, high-entropy (La 0.2 Dy 0.2 Er 0.2 Yb 0.2 Y 0.2 ) 2 Zr 2 O 7 oxide (RZHEO-1600) has been synthesized by using a simple solid-state reaction method and investigated as a promising thermal barrier coating (TBC) material with potential optical pressure sensing application. Compared to oxide-yttria stabilized zirconium (YSZ) and single component zirconates, RZHEO-1600 exhibits excellent thermal stability at 1600 °C and a larger thermal expand coefficient 13.5 × 10 −6 K −1 due to the high entropy effect. Its thermal conductivity (1.23–1.41 W m −1 K −1 ) and Vickers hardness (10 GPa) are lower than YSZ, while its fracture toughness (2.9 MPa m 1/2 ) is much larger. The photoluminescence (PL) emissions of RZHEO-1600 excited by 514 nm laser are assigned to 4 S 3/2 → 4 I 15/2 and 4 F 9/2 → 4 I 15/2 transitions of Er 3+ ions. The centre positions of emission peaks initially at 560 and 677 nm are sensitive to pressure, which red shift linearly with pressure coefficients of 0.178 nm/GPa (−5.650 cm −1 /GPa) and 0.223 nm/GPa (−4.932 cm −1 /GPa), respectively. Interestingly, the PL intensity ratios I 677 /I 658 and I 560 /I 547 are found to be pressure sensitive, which continuously increase during the compression. The findings of this study could serve as a new guide for the development of novel high-entropy oxide TBC materials with optical sensing applications.
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-MATERIALS IN ELECTRONICS
·
2024
·Vol. 35
·期 34
·1-8
·
IF 2.8
Zhang Gang,Yuwen Juntao,Lü Ruoxi,Wang Qing,Tang Zhipeng,Wu Kaiming
Precipitation of functional nanocrystals into glasses can endow many interesting properties to glasses and widen their application fields. In this work, optically active rare-earth ions doped Lu 4 Zr 3 O 12 nanocrystals were precipitated in silicate glasses through conventional melt-quenching and subsequent thermal treatment method. X-ray diffraction and transmission electron microscopy analysis confirmed the precipitation of Lu 4 Zr 3 O 12 nanocrystals upon thermal treatment. Absorption, emission and excitation-wavelength dependent emission spectra confirmed that Er 3+ ions were incorporated into Lu 4 Zr 3 O 12 nanocrystals. Green up-conversion emission was observed from these Er 3+ :Lu 4 Zr 3 O 12 nanocrystals doped glasses, and the temperature-dependent up-conversion emission showed that the Er 3+ :Lu 4 Zr 3 O 12 nanocrystals doped glasses had potential for low-temperature optical thermometry.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale
·
2012
·Vol. 5
·期 3
·1047-1053
·
IF 5.914
Fuyao Liu,Qi Zhao,Hongpeng You,Zhenxin Wang
Here, a two-step method has been developed for synthesizing carboxy-terminated NaYF4: Yb3+, Er3+@SiO2 core@shell nanoparticles (UCNP@SiO2) with ultrathin shell (1.5 nm). First, the NaYF4: Yb3+, Er3+ upconverting nanoparticles (UCNPs) were prepared using solvothermal technology; then, silica shells (SiO2) were deposited on the nanocrystals to form core–shell structures by the hydrolysis of tetraethylorthosilicate (TEOS). The ultrathin SiO2 shell was obtained by increasing surfactant amount and decreasing TEOS amount in the reaction mixture. Carboxyethylsilanetriol (CTES) was used to generate the carboxy group on the particle surface. The carboxy-terminated UCNP@SiO2 are ideally suited for biolabeling and bioimaging applications because the as-prepared nanoparticles have extreme colloidal and optical stabilities, and the carboxy groups on the particle surface easily react with amino residues of biomolecules. As an example, we reported on the interactions of Ricinus Communis Agglutinin (RCA 120) conjugated UCNP@SiO2 with HeLa cells. The excellent performance of the RCA 120 conjugated UCNP@SiO2 in cellular fluorescence imaging was demonstrated.
研究领域:
材料科学
·
生物医学工程
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Hanyu Xu,Mochen Jia,Zhiying Wang,Yanling Wei,Zuoling Fu
The core–shell engineering of lanthanide-doped nanoparticles has captured considerable attention because it can safeguard the luminescence intensity of the core by reducing surface defects. However, the limited surface area of the traditional spherical core–shell structure hinders the further breakthrough of the brightness. Herein, a unique NaYF4:Yb3+/RE3+@NaYF4:Yb3+/RE3+@NaNdF4:Yb3+ (RE3+ = Ho3+ or Er3+) dumbbell-shaped multilayer nanoparticle featuring a high surface area is reported. Its upconversion luminescence intensity is higher than that of the conventional spherical core–shell structure. A thorough investigation is performed on the luminescence and thermometric mechanisms of Ho3+/Er3+ distributed in the core and the first shell. Remarkably, when Ho3+/Er3+ ions are distributed in the first shell, the relative sensitivity of the biological luminescence nanothermometer composed of downshifting near-infrared emissions is increased to 2.543% K–1 (328 K), which considerably exceeds most reported values. The increased value is attributed to the more thermal-sensitive phonon-assisted energy transfer. For potential biological applications, dumbbell-shaped nanoparticles (DSNPs) with hydrophilic modification show excellent thermometric performance and high tissue penetration depth. Overall, the insights provided by this work will broaden the scope of novel DSNPs in the fields of luminescence and nanothermometry.
研究领域:
材料科学
·
生物医学工程
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Research Express
·
2019
·Vol. 6
·期 10
·106203
·
IF 1.449
Leipeng Li,Feng Qin,Yangdong Zheng,Zhiguo Zhang
There is a long history of using the Er3+ ion's 2H11/2/4S3/2–4I15/2 transitions for ratiometric thermal sensing. As demonstrated previously, these two transitions can be triggered via up- and down-conversion mechanisms. However, little attention is focused on the influence of these two mechanisms on the sensing performance for the 2H11/2/4S3/2–4I15/2 transitions. It was demonstrated here the as-prepared CaWO4:Yb3+, Er3+ phosphors could be effectively triggered by both the 980 and 405 nm laser diodes to generate the 2H11/2/4S3/2–4I15/2 transitions via up- and down-conversion mechanisms, respectively. Therefore, up- and down-conversion dual-mode optical thermometry was achieved in one micro-sized thermometer, which allowed us to study the difference between the two methods. Two of the most important evaluating parameters for temperature sensors, e.g., the relative sensitivity and the temperature resolution, were studied and compared upon excitations at 980 and 405 nm. It was confirmed that no obvious difference was observed in these two cases. What's more, it was demonstrated the 980 nm laser diode, compared with the 405 nm one, aroused more heat for the as-prepared samples. It may help us to select proper excitation sources in different situations.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Ruonan Wang,Ruitong Song,Chenning Wang,Tian Luo,Junshan Hu,Hao Fu
Although upconversion luminescence (UCL) materials have attracted considerable attention in biomedical, lighting, anti-counterfeiting, and solar cells due to their excellent fluorescence properties, reports of the dibarium gadolinium aluminum oxide (Ba 2 GdAlO 5 ) are scarce. Herein, we synthesized the single-phase Ba 2 GdAlO 5 material with non-stoichiometric Ba 2 Gd 1.06 Al 0.94 O 5 (denoted as BGAO, hereafter). The X-ray Rietveld refinement reveals that the substitution of Gd for Al accounts for the non-stoichiometry. Notably, the UCL properties of BGAO are realized by doping with Yb 3+ and Er 3+ ion pair, and it can be further enhanced significantly by co-doping with appropriate Zn 2+ ions. The SEM images show that the particle size increases as the concentration of Zn 2+ ions increases. The X-ray Rietveld refinement results of the Zn-doped BGAO: 0.1 Yb 3+ , 0.03Er 3+ phosphor indicate the substitution of Zn 2+ for Ba 2+ and Al 3+ ions simultaneously. Grain growth and lattice distortion account for the improvement of UCL properties after Zn 2+ ions doping. In addition, the temperature sensing performance of the Zn 2+ -doped sample has been researched based on the fluorescence intensity ratio (FIR) technique, and the maximum absolute and relative sensitivities ( S A-max and S R-max ) are obtained to be 4.8 × 10 −3 K −1 at 498 K and 1.1% K −1 at 298 K, respectively. This work provides a candidate with high UCL intensity for potential applications in optical temperature sensors.
研究领域:
材料科学
·
光学
✓ 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）