CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Wei Gao,Jinglei Zhang,Lin Shao,Jiaxi Li,Peng Ding,Qingyan Han,Xuewen Yan,Chenyun Zhang,Jun Dong
Enhancing upconversion luminescence in rare-earth materials through the plasmonic effects of precious metals has emerged as a highly effective strategy. In this study, we explore three distinct self-assembly techniques to fabricate alloy nano-film substrates using silver-coated gold (Au@Ag) core-shell nanoparticles, each with unique structural attributes. To enhance the upconversion luminescence of Er 3+ ions, we combine these substrates with NaYF 4 :Yb 3+ /Er 3+ nanoparticles, creating NaYF 4 :Yb 3+ /Er 3+ /Au@Ag composite nanostructures. The upconversion emission of Er 3+ ions is observably boosted when directly combined with Au@Ag nano-films of various structures under a 980 nm laser excitation. Surprisingly, incorporating a NaYF 4 inert shell as an isolating layer results in a remarkable 13.7-fold enhancement of upconversion luminescence in the NaYF 4 :Yb 3+ /Er 3+ @NaYF 4 /Au@Ag composite structure relative to isolated NaYF 4 : Yb 3+ /Er 3+ nanoparticles. The enhancement mechanism was carefully discussed based on spectral characteristics and luminous lifetime. It was found that the enhanced upconversion emission of nanoparticles on differently structured substrates is primarily driven by excitation enhancement. The composite rare-earth and metal nanoparticle structures fabricated in this investigation not only effectively enhance material spectral properties effectively but also streamline the process by employing an inert NaYF 4 shell as an isolation layer. This novel approach offers a promising avenue for developing efficient luminescent material systems.
研究领域:
材料科学
·
光学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2022
·
IF 3.754
Jingxin Ding,Huazhen Liao,Libin Pang,Deping Wang,Song Ye
Rare earth ions doped core-shell thermometers exhibit improved up-conversion emission behaviors, while the thermal sensitivity is not higher than the corresponding core-only structured luminescent thermometers via the thermal coupled levels based luminescence intensity ratio (LIR) technique. In this work, the core-only β-NaYF 4 : 16Yb 3+ , 4Er 3+ (C–4Er) up-conversion nanoparticles (UCNPs) and the sub 25 nm core-shell β-NaYF 4 : 16Yb 3+ , 4Er 3+ @0.5NaGdF 4 (CS–4Er@0.5Gd) and β-NaYF 4 : 16Yb 3+ , 4Er 3+ @1NaGdF 4 (CS–4Er@1Gd) UCNPs have been successfully synthesized by seed-mediated growth methods for temperature detection. The spectral study indicated that the up-conversion luminescence intensity of CS-4Er@0.5Gd and CS-4Er@1Gd was obviously enhanced compared withC-4Er. Luminescence intensity ratio originated from thermally coupled Stark sublevels (Stark-LIR) of Er 3+ ( 2 H 11/2 (1)(2), 4 S 3/2 (1)(2)(3)) of CS-4Er@0.5Gd and CS-4Er@1Gd has been firstly applied to calculated the relative thermal sensitivity (S R ) of core-shell UCNPs. As a result, S R of CS-4Er@1Gd is the largest among the considered UCNPs, and is increased from 10.95 × 10 −3 /K (LIR) to 17.80 × 10 −3 /K (Stark-LIR), indicating that with Stark-LIR techniques, the nano core-shell sensors behave a larger S R than core-only structured thermometers. This work may lead to an appropriate approach to improve the temperature sensitivity of core-shell thermometers for temperature sensing.
研究领域:
材料科学
·
光学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2023
·
IF 3.6
Yang Yu,Zuoling Fu,Zhiying Wang,Hanyu Xu,Mengmeng Dai,Rong Wang
In this paper, two types of phosphors, Cs 3 GdGe 3 O 9 :Er 3+ and Cs 3 GdGe 3 O 9 :Yb 3+ /Er 3+ , were synthesized using the high-temperature solid-state method, and a new role for Yb 3+ was successfully achieved. The presence of low phonon energy in the matrix and the low energy level mismatch between the 2 F 5/2 and the 4 I 11/2 enables the construction of a phonon-assisted channel between Yb 3+ and Er 3+ through doping with Yb 3+ ions. This channel overcomes thermal quenching and achieves thermal enhancement at high temperatures. Additionally, Yb 3+ increases the chance of non-radiative transition within the matrix, effectively converting the 980 nm laser into heat energy. This leads to a significant change in the surface temperature of the sample, greatly improving the photothermal conversion efficiency. Moreover, Yb 3+ greatly enhances the emission intensity of green light, resulting in a maximum relative sensitivity of 1.11 % K −1 for temperature measurements in the Er 3+ single-doped system and 1.28 % K −1 in the Yb 3+ /Er 3+ co-doped system, based on the Er 3+ thermally coupled energy level. These results demonstrate that this paper provides a new idea for materials to overcome thermal quenching and improve the efficiency of photothermal conversion and temperature sensing performance.
研究领域:
材料科学
·
光学
·
温度测量
·
光子学
✓ 已验证
DOI
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-10
·
IF 15.7
Zhang Wen,Zheng Wei,Huang Ping,Yang Dengfeng,Shao Zhiqing,Zhang Wei,Zhang Hao,Xie Zhi,Xu Jin,Chen Xueyuan
Yb 3+ /Er 3+ activated upconversion (UC) materials have been widely applied in many advanced technologies owing to their high UC efficiency in the visible region. However, it is challenging to achieve efficient ultraviolet (UV) UC luminescence (UCL) in Yb 3+ /Er 3+ system, due to the dense energy levels of Er 3+ that impose deleterious nonradiative relaxation. Herein, we report a strategy to liberate the UV-UCL of Er 3+ based on the confined energy transfer in Yb 3+ /Er 3+ co-doped 0D Rb 3 InCl 6 with a low phonon energy and a large interionic distance. This facilitates the population of Er 3+ at the 4 G 11/2 state, which yields intense upconverted UV emission at 384 nm, with a much higher UV-to-green ratio ( I 384 / I 554 = 0.864) than that of traditional UC materials ( < 0.1). By leveraging the intense upconverted UV emission of Er 3+ , we demonstrate the application of Rb 3 InCl 6 :Yb 3+ /Er 3+ nanocrystals as a NIR-to-UV transducer for NIR-triggered anion exchange of CsPbX 3 perovskite nanocrystals with high efficiency and good controllability. These findings offer an approach for the exploration of novel UC materials via energy transfer and crystal lattice engineering towards versatile applications.
研究领域:
材料科学
·
光学材料
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光子学
·
纳米技术
·
固体物理
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稀土材料
·
能量传递
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CRYSTAL GROWTH & DESIGN
·
2022
·
IF 4.01
Zeyu Cheng,Hao Ren,Yazhao Wang,Shengdi Ta,Peng Zhang,Yuhua Yang,Shoulei Xu,Bernard Albert Goodman,Wen Deng
Large-size and high-quality stable ZrO2 single crystals containing x mol % Yb2O3 (x = 7, 8, 9, 10) (denoted as xYbSZ), and 8YbSZ crystals doped with 0.5 mol % Er2O3 were grown by the optical floating zone (OFZ) method. Yb3+ was indicated by XRD and Raman spectroscopy to have successfully entered into the ZrO2 lattice, which was stabilized in the cubic phase when the concentration of Yb2O3 was ≥8 mol %. Er3+ successfully entered the 8YbSZ lattice, and its spectral absorption intensity was enhanced compared to Er3+ in the corresponding yttria-stabilized zirconia (8YSZ), thus demonstrating that the Yb3+ ion has an excellent sensitizing effect on the up-conversion luminescence of Er3+. Fluorescence decay curves show that the up-conversion luminescence excited state lifetime of Er3+ is significantly enhanced in 8YbSZ compared to 8YSZ. Thus, these results demonstrate that Yb3+ ions not only successfully stabilize ZrO2 in the cubic phase structure but also maintain their role as an up-conversion luminescence sensitizer for Er3+ ions.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
Materials Research Express
·
2018
·Vol. 5
·期 10
·106203
·
IF 1.151
Tao Pang,Wenbo Peng
Upconversion luminescence of Yb3+/Er3+ and Yb3+/Tm3+ co-doped Y2(MoO4)3 phosphors under 980 nm excitation is investigated. It is demonstrated that Yb3+ co-doping causes a significant thermal effect. For Yb3+ and Er3+ co-doped case, the thermal effect, the long-distance energy migration and the energy transfer from Er3+ to Yb3+ are responsible for the abnormal luminescence quenching. In the case of Yb3+ and Tm3+ co-doped, the thermal effect improves the excited efficiency of Tm3+, and thus the luminescence of Tm3+ continues to strengthen at the Yb3+ concentration that causes Er3+ luminescence quenching. These results contribute to the design of the efficient upconversion materials.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2023
·Vol. 11
·期 1
·172-185
·
IF 7
Kejie Li,Mengmeng Dai,Zuoling Fu,Zhiying Wang,Hanyu Xu,Rong Wang
Fluorides have garnered tremendous attention in rare-earth-doped fluorescent probes owing to their low phonon energy and excellent optical transparency. However, the latest generation of fluorides, LiYF4, is plagued by extremely complex and uncontrollable synthesis methods, which greatly restricts its further exploration and application. Herein, a straightforward one-step method for the synthesis LiYF4:Ln3+ with micron-sized cones and nano-spheres is reported. Astonishingly, self-sensitized luminescence was achieved under multi-wavelength excitation when Er3+ was singly doped. LiYF4:Yb3+,Er3+ demonstrated superior luminescence intensity to those of commercial green phosphors (NaYF4:Yb3+,Er3+); this ultra-efficient photoluminescence was confirmed from the crystal structure, electronic band properties, morphological analysis and Debye temperature calculations. Further, by constructing cross-relaxation between the Ce3+ and Er3+ ions (4I11/2 + 2F5/2 → 4I13/2 + 2F7/2), the specific four-peak emission (SFPE) intensity of Er3+ in NIR-IIb was significantly increased, further enhancing the relative sensitivity of thermally coupled temperature sensing based on SFPE. Subsequently, non-thermally coupled temperature sensing based on SFPE was also achieved through the construction of phonon-assisted energy transfer between Ho3+ 5I6 and Er3+ 4I13/2. In summary, this paper not only puts forward theoretical and experimental arguments for the use of LiYF4 to replace the conventional NaYF4, but also substantiates the extraordinary prospects of LiYF4 as a temperature-sensitive fluorescent probe in nanomedicine.
研究领域:
材料科学
·
纳米医学
✓ 已验证
DOI
高影响因子
CRYSTENGCOMM
·
2023
·Vol. 25
·期 38
·5452-5460
·
IF 3.1
Huimin Du,Yunhao Liang,Xingzuo Liu,Yue Deng,Jie Yang,Jun Yang,Shanshan Hu
Yb2(MoO4)3:Ln3+ (Ln = Ho, Tm, Er) phosphors were synthesized by a hydrothermal method with further calcination. The crystal structure and morphology of the samples were characterized by X-ray diffraction and scanning electron microscopy. The effects of rare earth ion interaction in the Yb2(MoO4)3:Ln3+ phosphors on the upconversion (UC) luminescence properties and energy transfer process at different doping concentrations were discussed. It is concluded that by doping Ho3+, Tm3+, and Er3+ in the Yb2(MoO4)3 host, the phosphors emit orange-yellow, blue and green light, respectively, and the energy transfer from Yb3+ → Ho3+/Er3+ and Yb3+ → Tm3+ is a two and three photon process, respectively. Under the excitation of a 980 nm laser, by changing the Ho3+/Tm3+ ratio in doped Yb2(MoO4)3, we have realized the transition of phosphors from cold white light to warm white light. The temperature sensitivity of the 2H11/2 and 4S3/2 energy levels of Yb2(MoO4)3:Er3+ in the range of 323–573 K was studied by the FIR technology. The experimental results show that the maximum absolute sensitivity was 0.0081 K−1 at 573 K and the maximum relative sensitivity was 0.01 K−1 at 323 K. Compared with other materials, the Er3+ doped Yb2(MoO4)3 phosphor is an excellent optical temperature sensing material.
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 LUMINESCENCE
·
2026
·
IF 3.8
Yuanjian Huang,Heng Yu,Zhanghai Tian,Ruirui Cui,Zijiang Luo,Xiang Guo
To construct high-performance green fluorescent media suitable for non-contact optical temperature measurement and information anti-counterfeiting, excellent fluorescence thermal stability phosphors are required. In this paper, CaLa 1- x GaO 4 : x Er 3+ phosphors were synthesized using a high-temperature solid-state method. When excited at 378 nm, the optimized CaLaGaO 4 :2%Er 3+ sample yielded efficient downshifting luminescence, with prominent green bands centered at 523 and 552 nm originating from the 2 H 11/2 → 4 I 15/2 and 4 S 3/2 → 4 I 15/2 transitions, respectively. Weak red emission near 669 nm, attributed to the 4 F 9/2 → 4 I 15/2 transition, was also observed. Leveraging fluorescence intensity ratio methodology based on thermally coupled energy levels ( 2 H 11/2 and 4 S 3/2 ) for non-contact optical temperature measurements, the system yielded a maximal relative sensitivity of 1.97% K −1 at 298 K, while the absolute sensitivity reached 0.89% K −1 at 473 K, highlighting its superior thermal sensing properties. Moreover, the refined luminescent powders were blended with polyvinyl alcohol (PVA) to formulate a security printing medium. This ink remains colorless under ambient illumination; however, upon exposure to 365 nm ultraviolet radiation, it distinctly exposes concealed alphanumeric characters and designs. Consequently, this system exhibits significant applicability within the domain of optical information encryption and forgery prevention. The synergistic combination of efficient downshifting luminescence and high temperature measurement sensitivity establishes the potential of synthesized CaLaGaO 4 :Er 3+ phosphors as a multifunctional platform for luminescence sensing.
✓ 已验证
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2015
·
IF 2.288
J.L. Wang,E.H. Song,M. Wu,W.B. Dai,S. Ye,Q.Y. Zhang
Selectively enhanced green upconversion (UC) and near-infrared (NIR) downconversion (DC) emissions of Er 3+ by Yb 3+ -Mn 2+ dimer sensitizing have been demonstrated in Er 3+ /Yb 3+ /Mn 2+ tri-doped spinel MgGa 2 O 4 upon excitation of 980 nm laser diode (LD). By optimizing the doping rate of Mn 2+ , the intensity ratio of green to red UC emission intensities of Er 3+ (G/R) could be enhanced about 10 times. Meanwhile, the 1.5 μm NIR DC emission could also be increased about 3.6 times in this system. The DC and UC emission properties, UC mechanism, as well as the enhancing mechanism have been investigated and discussed in detail. A selectively enhancing mechanism based on Yb 3+ -Mn 2+ dimer sensitizing is proposed to explain the selectively enhancing phenomena. This work could inspire the design of novel UC materials for various applications, such as temperature sensors and optical transmission, etc.
研究领域:
光学材料
·
生物医学光子学
·
无机功能材料
·
分子影像
·
转化医学
✓ 已验证
DOI
高影响因子
CRYSTENGCOMM
·
2024
·Vol. 26
·期 10
·1371-1379
·
IF 2.6
Meijuan Liu,Ying Chen,Xuegang Zheng,Haonan Zhao,Shusheng Pan,Zhiyu Liu,Dekang Xu,Hao Lin
In this study, a series of LiErF4:Tm@LiYF4:Yb,Er,Ce@LiYF4 core/shell/shell (C/S/S) UC nanoparticles (UCNPs) were prepared by a co-precipitation method. In this design of C/S/S structure, Er3+ is used as an energy collector in the first shell, which can reduce the energy loss by absorbing spontaneous emission from Yb3+. Then, by adding appropriate concentrations of Ce3+ into the same shell, the cross relaxation effect between Er3+ and Ce3+ is exploited to improve the efficiency of Er3+ in collecting the energy of spontaneous emission from Yb3+. During the upconversion (UC) process, Yb3+ plays a role as an energy transfer bridge, transferring the energy back to Er3+ in the core, thus enhancing the red UC emission intensity. Meanwhile, Tm3+ acts as an energy trapping center that contributes to the red emission. The results show that the spontaneous emission loss of Yb3+ has a certain effect on the UC fluorescence intensity, which will weaken the fluorescence to some extent, however is not the cause of the substantial decay of fluorescence. Therefore, this study provides clues for researchers to identify main factors affecting the luminescence efficiency, which will help develop more efficient UCNPs.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Scientific Reports
·
2024
·Vol. 14
·期 1
·1-9
·
IF 3.8
Liu Yongtao,Duan Bin,Zhou Lin,Wu Yuxiang,Wang Fengyi,Ding Changchun,Hu Junshan
Here, this study reports single-band red upconversion emission in β-Ba 2 ScAlO 5 : Yb 3+ /Er 3+ phosphor by doping Mn 2+ . The optimum concentration of Mn 2+ ions in β-Ba 2 ScAlO 5 : Yb 3+ /Er 3+ phosphor was 0.20. The intensity of red and green emissions is increased by 27.4 and 19.3 times, respectively. Compared with the samples without Mn 2+ ions, the red-green integral strength ratio of β-Ba 2 ScAlO 5 : Yb 3+ /Er 3+ /Mn 2+ sample was significantly increased by 28.4 times, reaching 110.9. The UCL mechanism was explored by analyzing the down-conversion luminescence spectra, absorption spectra, UCL spectra, and upconversion fluorescence lifetime decay curves of Yb 3+ /Er 3+ /Mn 2+ co-doped β-Ba 2 ScAlO 5 . The enhancement of upconversion red light is achieved through energy transfer between defect bands and Er 3+ ions, as well as energy transfer between Mn 2+ ions and Er 3+ ions. In addition, the Mn 2+ doped β-Ba 2 ScAlO 5 : Yb 3+ /Er 3+ red UCL phosphors have great potential for ambient temperature sensing in the 298–523 K temperature range. The maximum sensitivity of β-Ba 2 ScAlO 5 : Yb 3+ /Er 3+ /Mn 2+ phosphor as a temperature sensor at 523 K is 0.0247 K −1 .
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）