JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2024
·
IF 3.5
Haoqiang Zhang,Hao Chen,Liang Xu,Yongjin Li,Zhiguo Song,Dacheng Zhou,Qi Wang,Zhangwen Long,Yong Yang,Yugeng Wen,Jin Han,Yuan Gao,Jianbei Qiu
Inorganic chiral materials have attracted increasing attention due to their application prospects. In this work, we synthesized the chiral nanostructured bismuth oxychloride co-doped with Er 3+ /Yb 3+ phosphor (D-BYEP) by hydrothermal growth with a subsequent air-annealing strategy using chiral sugar alcohols as the chiral inducer. The D-BYEP emitted bright red light under the excitation of 980 nm near-infrared laser. The temperature sensing behavior was evaluated by employing the thermally coupled (TCLs) or non-thermally coupled (NTCLs) levels of Er 3+ . The maximum relative sensitivities ( S R ) obtained are 0.84% K −1 and 1.30% K −1 (298 K), respectively. The results show that the D-BYEP may be ideal candidates for optical temperature sensors. We anticipate that this new type of inorganic chiral phosphor may have a range of applications in temperature measurement of light sources.
研究领域:
材料科学
·
光学
·
无机化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Omega
·
2018
·
IF 0
Wen Qi,Qian Wu,Joseph G. Shapter,Meng Duan,Sheng Yang,Guo Gao
Chirality, universal characteristics of nature, introduces asymmetry in synthetic materials. Revealing the microscopic asymmetry of macroscopically symmetric materials is the key to control the growth of chiral materials and give full play to their application potential. Materials for photon upconversion (UC) are of great interest for many applications owing to their anti-Stoke luminescence process, especially for chiral UC materials. For the preparation of UC materials, a tiny change in reaction parameters will lead to variations in morphology, phase components, and fluorescence intensity, as well as its chirality. Because of the strict reaction conditions for the formation of chiral UC materials, there are no reports of the successful synthesis of chiral UC materials. Therefore, a facile method for the controllable synthesis of chiral UC materials is highly desired. Herein, chiral-assembled hexagonal prisms of β-NaYF4:Er3+/Yb3+ microcrystals were synthesized to realize the smart manipulation of their morphology as well as a great improvement of the fluorescence efficiency. We proposed a three-stage doped β-NaYF4 crystal growth mechanism on mesoscale regulation, where the fluorescence enhancement principle of chirality was revealed. The enhancement of fluorescence efficiency of chiral UC materials endows their promising application in luminescent displays.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
JOURNAL OF MATERIALS SCIENCE
·
2019
·Vol. 54
·期 18
·11913-11924
·
IF 3.442
Li Zhiying,Li Peng,Guo Linna,Zhang Zongxue,Gao Minghuan,Zhang Yuansen,Li Tiesheng
A series of RE 2 MoO 6 : 2%Er 3+ , 15%Yb 3+ (RE = Y, Pr, Nd, Sm, Eu, Gd, Dy, and Lu) nanoparticles were prepared by citric acid-assisted sol–gel method.
The upconversion luminescence (UCL) properties of block-shaped Gd 2 MoO 6 : 2%Er 3+ , 15%Yb 3+ were the best among the materials obtained. In addition, the UCL properties of the investigated systems by two strategies could be further improved. Modulation of the crystal structure could be achieved by the substitution of rare earth ions in matrix lattice. The UC emission intensity of Gd 2 MoO 6 doped with Y 3+ (40%) was enhanced about 2.27 (2.52) more times than that of Y 3+ -absent samples excited at 980 nm (1550 nm). Secondly, dual wavelength was used as the excitation wavelength simultaneously: The green UCL intensity of RE 2 MoO 6 : 2%Er 3+ , 15%Yb 3+ was almost not changed, while the red UCL intensity was enhanced compared to the sum of the red UCL intensities excited by 980 nm and 1550 nm, respectively. The UCL mechanism excited by dual wavelength was investigated in detail, in which the two co-operative excitation processes were presented.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED MATERIALS
·
2023
·Vol. 35
·期 25
·2300118
·
IF 29.4
Hongfei Li,Xiaoqi Liu,Donglei Zhou,Biao Dong,Lin Xu,Xue Bai,Hongwei Song
Erbium ions (Er 3+ , 1.54 µm) electric pumped light sources with excellent optical properties and a simple fabrication process are urgently desired to satisfy the development of silicon-based integration photonics. The previous Er-based electroluminescence devices are mainly based on Er-complexes or Er-doped oxide compounds, which usually suffer from low external quantum efficiency(EQE)or high applied voltage etc. In this work, a novel type of Er 3+ /Yb 3+ co-doped lead-halide perovskite films (Er 3+ /Yb 3+ :CsPbCl 3 ) with the maximum photoluminescence quantum yield of 30.12% are prepared by a simple two-step solution-coating method and the corresponding light emitting diodes (Er-PeLEDs) are fabricated, which demonstrate an almost pure 1.54-µm emission and a peak EQE up to 0.366% at a low applied voltage of 1.4 V. Strong negative thermal quenching effect may help Er-PeLEDs suppress Joule heating quenching. These excellent LED properties benefit mainly from the outstanding regulatory performance of acetate to perovskite films, the excellent semiconductor behavior and strong ionic property of the perovskite, and the involvement of Yb 3+ ions, which can directly and efficiently transfer the exciton energy to Er 3+ through a quantum cutting process. Overall, the realization of 1.54-µm Er-PeLEDs offers new opportunities for silicon-based integrated light sources.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
OPTICAL AND QUANTUM ELECTRONICS
·
2023
·Vol. 55
·期 11
·1-15
·
IF 3
Li Xin,He Yu,Guo Yangyang,Mao Huibing,Chen Ye,Wang Jiqing
The Er 3+ , Yb 3+ and Mn 2+ co-doped perovskite NaMgF 3 submicron particles have been successfully fabricated and the related upconversion (UC) emission was investigated in this paper. The UC emission spectra confirm that the emission color of the Er 3+ ions can be modulated by the doping of the Mn 2+ ions, the incident laser power and the laser pulse-width. The UC emission results demonstrate that the key factor to modulate the UC emission color of the Er 3+ ions is the Mn 2+ ions in the submicron particles, in which the NaMgF 3 submicron particles have the largest relative green emission bands with the 3% Mn 2+ concentration. The experimental results also confirm that the UC intensities ratio of the green to the red emission will increase with the increase of the incident laser power and the decrease of the laser pulse-width. All the UC emission results imply that there are two energy transfer paths from the Mn 2+ state 4 T 1 to the Er 3+ ions, in which the transfer rate to the state 4 S 3/2 is far larger than the transfer rate to the state 2 H 11/2 and the energy transfer mechanism may related with the special structure of the Mn 2+ ions and the phonon-assisted processes.
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
·
2026
·
IF 5.6
Juan Wang,Tianzhi Jiang,Danyang Shen,Renguang Ye,Youjie Hua,Hangqi Li,Caixia Song,Junhao Wu,Hongping Ma,Chenxia Li,Degang Deng,Shiqing Xu
The size of lanthanide upconversion nanocrystals has a considerable impact on their luminous characteristics, but the underlying mechanism is yet unknown. Six typical samples were chosen for systematic size effect experiments after we manufactured monodisperse Y 2 O 2 S: Er 3+ /Yb 3+ microspheres. Our results establish surface defects induced by specific surface area as the fundamental mechanism governing nanoscale structure-property correlations, showing that phosphor particle size can be directionally controlled to maximize both luminescent performance and temperature-sensing capabilities. We have identified the mechanism behind size-dependent optical properties: larger particles alter the emission color and significantly enhance the luminescence intensity. Temperature-sensing behavior also exhibits strong size dependence: absolute sensitivity (S a ) correlates negatively with size and positively with temperature at the thermally coupled level (TCL); at the non-thermally coupled level (NTCL), S a correlates negatively with both size and temperature. It's interesting to note that the S a value for the smallest sample is 17 times higher at TCLs, reaching 0.0866 K -1 . Our findings provide a clear fundamental understanding of size effects in nanoscale lanthanide upconversion luminescence and offer important insights for nanoscale temperature sensing.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
·
2024
·Vol. 41
·期 3
·798-808
·
IF 1.8
Shengyi Liu,Duan Gao,Li Wang,Wenbin Song,Zhiliang Zhang,Shitao Wang,Ying Zhu,Qi Zhang
${{\rm Er}^{3 +}}/{{\rm Yb}^{3 +}}$ co-doped ${{\rm SrBi}_4}{{\rm Ti}_4}{{\rm O}_{15}}$ crystalline powders were synthesized using the high-temperature solid-phase method. The crystal structure of the obtained phosphors was analyzed through x-ray diffraction (XRD), confirming the purity of all products such as ${{\rm SrBi}_4}{{\rm Ti}_4}{{\rm O}_{15}}$. Employing experimental design optimization theory, regression equations were established to correlate the ${{\rm Er}^{3 +}}/{{\rm Yb}^{3 +}}$ doping concentrations with the luminescent intensities. The genetic algorithm was utilized to compute the optimal solutions of the equations, resulting in ${{\rm Er}^{3 +}}$ and ${{\rm Yb}^{3 +}}$ doping concentrations of 3 mol% (molar fraction) and 20 mol% under 980 nm laser excitation and 3 mol% and 29.79 mol% under 1550 nm laser excitation. The up-conversion fluorescence emission spectra of the samples were measured under 980 nm excitation, revealing intense green emissions at 525 nm, 550 nm, and 662 nm, corresponding to the $^2{{\rm H}_{11/2}}{\to}{^4}{{\rm I}_{15/2}}$, ${^4}{{\rm S}_{3/2}}{\to}{^4}{{\rm I}_{15/2}}$, and $^4{{\rm F}_{9/2}}{\to}{^4}{{\rm I}_{15/2}}$ energy levels, respectively. Under 1550 nm excitation, peaks corresponding to the same energy levels were observed at 523 nm, 548 nm, and 661 nm. The relationship between the up-conversion fluorescence and the laser operating current for the optimal samples under 980 nm and 1550 nm excitations was explored, indicating two-photon and three-photon processes, respectively. Detailed analysis and discussion of the up-conversion fluorescence mechanisms were conducted. Additionally, the relationship between the up-conversion fluorescence and the temperature for the optimal samples was investigated, revealing excellent temperature sensing characteristics under 980 and 1550 nm laser excitations. The CIE coordinates for the optimal samples were calculated as (0.3111, 0.6747) and (0.5254, 0.4671) under 980 nm and 1550 nm excitations, respectively.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
Journal of Physical Chemistry C
·
2025
·
IF 3.2
Zehui Chen,Mengyan Cao,Zhihui Rao,Xiao Gong
Lanthanide ion-doped metal halides are a promising class of fluorescent materials. In this paper, we investigated the optical properties and photophysical mechanism of Er3+, Yb3+-doped Cs2NaScCl6 phosphor. It was demonstrated that in both up-conversion (UC) and down-shifting emission modes, the increase of Yb3+ concentration resulted in enhancement of the 4F9/2 → 4I15/2 emission of Er3+ in Cs2NaScCl6. In particular, UC emission gradually shifts from green to yellow with the enhancement of the excitation power density observed in Yb3+-rich systems. The complex cross-relaxation behavior between Yb3+ and Er3+ results in these phenomena. New paradigms are provided for the development of multimodal and dynamic fluorescent anticounterfeiting materials.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Results in Physics
·
2019
·
IF 3.042
Biao Zheng,Cheng Zhang,Chunlei Huang,Jinquan Hong,Yuliang Li,Jun Wang,Lin Lin,Zhiqiang Zheng
Multifunctional NiO@Gd 2 O 3 :Er 3+ ,Yb 3+ hollow nanocomposites (NCs) with mesoporous, upconversion (UC) luminescent and magnetic properties are synthesized by a facile hydrothermal process. Transmission electron microscope (TEM) and scanning electron microscope (SEM) images reveal that the samples have hollow structures with double shells of UC layer and magnetic layer. N 2 adsorption/desorption isotherm analysis shows the samples have large surface area of 29.052 m 2 /g and typical mesoporous structure. Multicolored UC luminescence at 521 nm, 541 nm and 654 nm are obtained under 980 nm laser excitation. In addition, the measured magnetic hysteresis loops indicate the samples exhibit high superparamagnetic behavior (15.8 emu/g). These multifunctional NCs have potential applications in the field of fluorescence probe, targeted therapy, magnetic separation, etc.
研究领域:
材料科学
·
纳米技术
·
光学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL PHYSICS LETTERS
·
2016
·
IF 1.86
Zhen Wei,Wei Zheng,Zhiyong Zhu,Xiongfei Guo
SrWO 4 :Er 3+ /Yb 3+ phosphors are synthesized by a solid state reaction . The XRD patterns indicate that the doping ions will not change the phase of SrWO 4 . Under the excitation at 980 nm, SrWO 4 :Er 3+ /Yb 3+ phosphors show emission bands in green and red regions. The temperature-dependence of upconversion efficiency and temperature-sensing properties of SrWO 4 :Er 3+ /Yb 3+ phosphors have been discussed according to the fluorescence intensity ratio of green emissions from 2 H 11/2 / 4 S 3/2 → 4 I 15/2 transitions of Er 3+ in the range of 95–775 K under the excitation at 980 nm. The maximum sensitivity of SrWO 4 :1%Er 3+ /6%Yb 3+ phosphor is found to be 0.01282 K −1 at 489 K.
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
·
2022
·
IF 5.6
Mei-Hong Liu,Teng-Teng Li,De-Long Zhang
Micron-sized GdNbO 4 :Er 3+ /Yb 3+ phosphors were prepared by employing a high-temperature solid-state reaction. The crystalline phase, morphology, composition, spectroscopic properties, and impact of rare-earth ion concentration, temperature and high salinity environment were systematically characterized. The extracted results show that phosphor is dominated by the existence of the GdNbO 4 crystalline phase. Their morphology and agglomeration phenomenon are strongly dependent on the rare-earth concentration. The phosphor exhibits also excellent up-conversion luminescence (UCL) properties under 980 nm excitation, while a two-photon process accounts for UCL. The following optimal concentrations were selected for enhanced UCL intensity: 10 mol% for Yb 3+ and 3 mol% for Er 3+ . The phosphor shows excellent thermometric performances including strong UCL, good thermal stability, appropriate sensitivity and a wide sensitivity response range. To evaluate the accuracy of the present optical thermometer, the temperature of a heated bench has been comparatively measured by using the proposed optical thermometer and a commercial thermocouple with an accuracy of 1 K. By comparing the temperature values measured by the two methods, it can be concluded that the present optical thermometer has an accuracy better than 1.6 K. In addition, the phosphor exhibits good chemical stability in high salinity environment. Interestingly, its crystalline phase, structure, and UCL spectral structure, intensity and color are all preserved after one-month immersion into a high salinity solution.
研究领域:
材料科学
·
光学
·
海洋科学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS SCIENCE FORUM
·
2020
·
IF 0
Ming Yang,Shun An Chen,Qian Ru Lin,Tao Pang
In this paper, upcovnerison luminescence in Er3+/Yb3+ co-doped NaYF4 nanophosphors was regulated by changing the Er3+ concentration. With increasing the Er3+ concentration, the green and red emissions increased first and then decreased, but the intensity ratio of red to green emission decreased monotonically. To clarify the role of Er3+ doping, the factors including crystal structure, morphology and size of particle, photon absorption, energy transfer, multi-phonon relaxation, population of emissive levels and emission probability of radiative transitions were considered and analyzed. More importantly, we proposed a simple method for discussing radiation transitions based on luminescence temperature sensing.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
危险品化学品经营许可证（带存储）