RSC Advances
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2014
·Vol. 4
·期 107
·62802-62808
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IF 3.708
Yan Song,Guixia Liu,Xiangting Dong,Jinxian Wang,Wensheng Yu,Jingmei Li
Bifunctional hybrid nanocomposites based on upconversion luminescence and photothermal properties have a wide range of application, especially biomedical diagnosis and therapy. Herein, the hybrid nanocomposites were prepared via combining NaYF4:Yb3+,Er3+/Ho3+ nanocrystals as shell layer materials and Au nanoparticles as the cores. The as-prepared nanocomposites can simultaneously take advantage of both the upconversion luminescence of NaYF4:Yb3+,Er3+/Ho3+ nanocrystals and the photothermal transduction property of Au nanoparticles. The structure, morphology and composition of the nanocomposites were confirmed by X-ray powder diffraction (XRD), transmission electron microscopy (TEM) and energy dispersive spectroscopy (EDS). In addition, the upconversion luminescence and photothermal transduction were evaluated. We observed an overlap between the absorption band of Au nanoparticles and the upconversion emission peaks of the Er3+/Ho3+ ions, and the luminescence resonance energy transfer (LRET) was studied and demonstrated. Under 980 nm laser irradiation, upconversion luminescence and efficient photothermal transduction of the hybrid nanocomposites were found. Moreover, the bifunctional nanocomposites also have shown excellent biocompatibility.
研究领域:
生物医学
·
材料科学
✓ 已验证
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Mingyue Zhang,Ting Li,Kairui Zhang,Baoqing Sun,Le Wang,Zhaoyu Guang
All-inorganic lead-free halide double perovskites (HDPs) with unique soft lattice structure have attractive photoluminence (PL) from self-trapping excitons (STEs). However, pristine HDPs suffer from low PL quantum yiled and narrow color gamut, collectively hindering their applications. Here, heavy metal ion Sb 3+ is introduced into rare-earth-based Cs 2 NaLuCl 6 HDPs to enhance the blue emission intensity of STEs and the mechamism is illustrated through DFT calulation. Then lanthanide ions (Ln 3+ = Er 3+ , Ho 3+ ) are added in blue light emissive Cs 2 NaLuCl 6 : Sb 3+ and typical green and red light emission can be obtained via the energy transfer (ET) from STEs to Er 3+ and Ho 3+ , respectively. Luminescence chromaticity modulation and white emission is achieved by adjusting the doping content of Ln 3+ . Leveraging the distinct thermal responses of STEs and Er 3+ emissions in Cs 2 NaLuCl 6 : Sb 3+ , Er 3+ , a dual-mode fluorescence intensity ratio (FIR) thermometer is proposed by integrating non-thermally coupled energy levels (NTCL) and thermally coupled energy levels (TCL) of STEs and Er 3+ . The dual-mode FIR thermometer exhibits pronounced chromaticity variation (CIE Δy = 0.072) with temperature range from 294 to 473 K, elevated sensitivity (S r = 1.24 %) at 293 K and better repeatability test, demonstrating its application for high-precision visualized optical temperature sensing.
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DOI
高影响因子
JOURNAL OF LUMINESCENCE
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2024
·
IF 3.3
Xiaoyu Wu,Yang Yu,Kejie Li,Mingqin Huang,Zuoling Fu
The near-infrared-II (NIR-II) fluorescence thermometer based on rare earth-doped double perovskite is rarely. Herein, Er 3+ -Ho 3+ and Yb 3+ co-doped lead-free double perovskite La 2 MgTiO 6 (LMTO) phosphors were synthesized by a conventional high temperature solid phase method. The phase purity and morphology of the samples were analyzed using XRD and FE-SEM. The NIR-II luminescence properties of LMTO: Er 3+ -Ho 3+ -Yb 3+ phosphors were systematically investigated under laser irradiation at 980 nm. A NIR-II fluorescence thermometer was also designed based on non-thermal coupled energy levels originated from the 4 I 13/2 energy level of Er 3+ and the 5 I 6 energy level of Ho 3+ . The maximum value of relative sensitivity (S r ) was 0.54 % at 513 K. Compared to visible thermometers (LMTO: Er 3+ -Yb 3+ and LMTO: Ho 3+ -Yb 3+ ), the NIR-II thermometers offer better temperature measurement capability and penetration depth. All the experimental results show that the NIR-II thermometer with a wider range and higher sensitivity has been realized, which puts forward a new idea for the design and optimization of NIR-II thermometers.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2022
·Vol. 24
·期 34
·6001-6008
·
IF 3.756
Heyan Wu,Yunhao Liang,Yue Ma,Jun Yang,Shanshan Hu
This work begins with a study of the synthesis of multi-color luminescence phosphors, which is followed by a discussion of the temperature sensitivity of AgBi(MoO4)2:Yb3+/Er3+. Uniform and approximately spherical particles of AgBi(MoO4)2-based phosphors were prepared by a simple one-step hydrothermal method without adding any surfactant. We obtained a series of rich green, yellow, blue, and white luminescence phosphors by doping Ln3+ (Ln3+ = Yb3+, Er3+, Ho3+, Tm3+) into the AgBi(MoO4)2 matrix, and an analysis of various correlative factors was made, especially for the amounts of doping ions. Furthermore, the investigation of the temperature sensitivity of AgBi(MoO4)2:Yb3+/Er3+ revealed that the fluorescence intensity becomes lower with increasing temperature from 323 to 573 K. The fluorescence intensity ratio (FIR) of the two thermal coupling energy levels (2H11/2, 4S3/2) of Er3+ was calculated, and the absolute sensitivity of the obtained phosphor reached a maximum value of 1.32% K−1 at 463 K, as obtained by fitting the FIR as a function of temperature, which is a relatively high level compared with other related materials. This material is expected to be used as a highly sensitive FIR thermometer.
研究领域:
材料科学
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光学
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发光材料
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温度传感
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2021
·
IF 3.08
Yuchao Shi,Jing Li,Wenhao Cui,Yaru Peng,Yuxin Huang,Li Chen
Monodisperse In 2 O 3 : Yb 3+ /Er 3+ upconverting nanoparticles (UCNPs) were firstly synthesized via solvothermal method in three-neck round-bottom flask. Powder X-ray diffraction (XRD), transmission electron microscopy (TEM) and Fourier-transform infrared spectroscopy (FTIR) methods are used to characterize the prepared UCNPs. The size of monodisperse spheroid nanoparticles prepared can be controllable in 31 nm. The sample exhibits stronger upconversion luminescence (UCL) than reported In 2 O 3 : Yb 3+ /Er 3+ UCNPs with similar size. Furthermore, the obtained In 2 O 3 UCNPs, by coating the SiO 2 protecting layer, display fine stability. Simultaneously, the UCL properties and possible energy transfer process of In 2 O 3 : Yb 3+ /Ho 3+ and In 2 O 3 : Yb 3+ /Tm 3+ NPs have also been investigated by the spectra distribution and power dependence. The results indicate Yb 3+ /Er 3+ , Yb 3+ /Ho 3+ and Yb 3+ /Tm 3+ codoped In 2 O 3 UCNPs is a probable oxide upconverting material with small size and intense UCL for biological applications.
研究领域:
材料科学
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光学
·
生物医学
✓ 已验证
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
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2026
·
IF 5.7
Hui Zeng,Xiaolang Fan,Yangbo Wang,Huaiyong Li
Lanthanide NIR-II luminescence free from thermal quenching is attractive for various applications at elevated temperatures. Here, we present a thermal enhancement of Er 3+ NIR-II luminescence based on the synergy of phonon assisted Er 3+ -Er 3+ cross relaxations and controllable Er 3+ -Ho 3+ energy transfer. The lattice expansion of NaYGeO 4 olivine phosphor upon heating (298–823 K) suppresses the Er 3+ -Ho 3+ energy transfer and leads up to 46.1 times enhancement of Er 3+ NIR-II luminescence under 379 nm excitation. The NIR-II luminescence evolution as increasing temperature allows dual-mode ratiometric thermometry, i.e., luminescence intensity ratios (LIRs) based on Er 3+ 4 I 13/2 Stark sublevels and on Er 3+ 4 I 13/2 and Ho 3+ 5 I 6 levels. Obtained relative sensitivities above 0.46% K ‒1 over a broad temperature range of 298–673 K with a maximum of 2.32% K -1 suggest NaYGeO 4 :Er 3+ /Ho 3+ phosphor as a promising NIR-II luminescence thermometer. Moreover, this research offers an available perspective for designing thermal-enhanced NIR luminescence in ordinary thermal expansion materials.
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DOI
高影响因子
JOURNAL OF RARE EARTHS
·
2025
·
IF 7.2
Yuhong Zhang,Xuezhong Yang,Hongqun Zhu,Chunhui Sun,Haoran Wang,Haozhou Tian,Hang Liu
Here, a new type of Sb 3+ ions alloying with RE 3+ (RE = Er, Ho) ions heavy concentration doped Cs 2 NaBiCl 6 double perovskites (DPs) was successfully synthesized by solvothermal method. The structure and morphology of all samples were characterized with X-ray diffraction, energy dispersive spectroscopy and X-ray photoelectron spectroscopy. The excitation and emission spectra for all samples are investigated in detailed. Under 354 nm excitation, a strong broad blue emission band from 400 to 500 nm is obtained in Cs 2 NaBiCl 6 :15 mol%Sb 3+ DPs. Compared with the Cs 2 NaBiCl 6 :RE 3+ sample, the emission intensities of Er 3+ and Ho 3+ ions for Cs 2 NaBiCl 6 :Sb 3+ /RE 3+ DPs are enhanced by 38 and 29 times due to alloying Sb 3+ ions, respectively. And the self-trapped exciton (STE) emission intensity is also dramatically increased. The energy transfer process from free exciton (FE) to STE and excited state level of RE 3+ contribute to increased luminescence intensity. In addition, the temperature-dependent luminescence spectra of Cs 2 NaBiCl 6 :Sb 3+ /RE 3+ samples were measured from 83 to 423 K. The luminescence thermal enhancement phenomenon is obtained at lower temperature range. At last, the anti-counterfeiting application of Cs 2 NaBiCl 6 :Sb 3+ /RE 3+ samples is elaborated due to their bright multi-color emission under different excitation and temperatures.
研究领域:
材料科学
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光学材料
·
发光与光子学
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稀土掺杂
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防伪技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2023
·
IF 3.6
Chuncheng Zhang,Chaomin Zhang,Chao Yun
In this paper, Er 3+ /Ho 3+ co-doped fluoride glasses were prepared by the high temperature melt-quenching technique. Pumped by the 980 nm LD , as a result of the emission spectra overlapping of Er 3+ and Ho 3+ ions, a broadband mid-infrared emission band from 2530 to 2950 nm with a full width at half maximum of the synthetic fluoride glasses near 231 nm was obtained, which exist latent application in wide band tunable mid-infrared fiber laser. Furthermore, the intense 4.1 μm mid-infrared fluorescence (3600–4400 nm) was obtained and the FWHM was 320 nm. The up-conversion emission peaks around 525, 546 and 660 nm, near-infrared emissions at 1.2 and 1.5 μm together with mid-infrared fluorescence around 2.0 μm was observed in Er 3+ /Ho 3+ co-doped fluoride glass. Moreover, the relevant energy transfer processes were discussed in detail based on the emission spectrum and the energy level transition processes. The results indicate that the fabricated Er 3+ /Ho 3+ co-doped fluoride glasses exist prominent emission features for fiber laser gain medium.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Materials Science and Engineering B-Advanced Functional Solid-State Materials
·
2020
·
IF 4.706
Yuzhen Sun,Huifang Bi,Tao Wang,Leilei Sun,Zexin Li,Haining Song,Fenglei Sun,Haifeng Zhou,Guangjun Zhou,Jifan Hu
NaYF 4 :10Er/0.5Ho/30Ca@NaYF 4 is designed to achieve up-conversion luminescence color adjustment under 980 nm excitation. Ho 3+ doping enhances the red emission level of the system and changes the characteristic green emission into red emission. Importantly, Ho 3+ doping increases the difference in pumping time between green and red excited states. Under short pulse-width laser excitation, the red excited state does not have enough time to be populated, which weakens the emission of red emission, and the ratio of green to red emission will change. It is an effective up-conversion luminescence enhancement method to change the symmetry of crystal field around lanthanide ions by doping Ca 2+ . The green and red emission intensities of NaYF 4 :10Er/0.5Ho/30Ca doped with 30% Ca 2+ ions are 9.0 and 6.3 times higher than those of Ca 2+ free samples, respectively.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
ACS Applied Electronic Materials
·
2023
·
IF 4.7
Hanyu Xu,Mengmeng Dai,Kejie Li,Aijun Li,Tianqi Sheng,Zuoling Fu
Luminescence intensity ratio (LIR) thermometry based on distinct up-conversion luminescence centers was established in Cs-based fluorides. By contrasting the nonthermally coupled luminescence intensity of Er3+/Ho3+/Tm3+, it is possible to determine which kind of up-conversion emission ion is more suited for the perovskite-like Cs3YF6 material. The best option is Er-doped Cs3YF6 samples with a relative sensitivity (Sr) of 0.96% K–1, according to a comparison of the LIR fitting findings. However, the extremely high absolute sensitivity (Sa) in Cs3YF6: Yb, Tm suggests that Sa is not trustworthy in the LIR temperature evaluation system according to the temperature resolution δT. This work provides recommendations for the LIR temperature sensing design for comparable Cs-based fluorides while minimizing time and expense.
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）