JOURNAL OF LUMINESCENCE
·
2023
·
IF 3.6
Runfa Liu,Yue Pan,Jia Zhang,Xincui Zhuang,Yangbo Wang,Xufeng Zhou,Shanshan Du,Huaiyong Li,Wei Li
Ratiometric luminescence thermometry is awfully applicable for non-contact temperature detection. Lanthanide luminescent materials available for high-performance ratiometric thermometry are still highly desirable until now. Herein, two novel upconversion phosphors, Yb 3+ /Ho 3+ co-doped BiOF and BiF 3 microcrystals , were synthesized and investigated systematically in terms of their crystalline structure, room temperature and temperature-dependent upconversion properties. Under 980 nm laser excitation, both microcrystals bring forth the characteristic emissions of Ho 3+ , with an identical overall luminescent color of green, while the intensity is much higher in BiF 3 :Yb/Ho microcrystals. When increasing temperature, the upconversion intensity at various wavelengths for both microcrystals is reduced, meanwhile fluorescence intensity ratios of both 545/656 nm and 752/656 nm decrease highly regularly, establishing a ratiometric thermometry therefore. BiF 3 :Yb/Ho microcrystals were demonstrated to have significantly superior thermometric performance than BiOF:Yb/Ho, and a high relative sensitivity up to 5.41% K −1 as well as a wide temperature sensing range of 298–673 K were obtained.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
ECS Journal of Solid State Science and Technology
·
2024
·Vol. 13
·期 3
·037004
·
IF 1.8
Aierpati Taximaimaiti,Aierken Sidike,Halizati Abulimiti,Qingling Wang
In this paper, a SrAl2Si2O8:Tm3+,Yb3+ upconversion (UC) phosphor was prepared with a high-temperature solid-phase method, and proved that the strontium feldspar structure was an excellent UC matrix. The Tm3+ were shown to have a maximum relative thermometric sensitivity (Sr) of 1.67% K−1 at 298 K and a maximum absolute thermometric sensitivity (Sa) of 1.34% K−1 at 573 K. The non-thermally coupled energy level corresponded to the maximum relative thermometry sensitivity (Sr) of 2.4% K−1 at 298 K and a maximum absolute sensitivity (Sa) of 13% K−1 at 423 K. The use of the fluorescence intensity ratio of the nonthermally coupled energy levels of Tm3+ for temperature measurements improved the temperature measurement sensitivity of the same material. These results indicated that the phosphor has good temperature sensing performance with a wide sensing range and good stability and has potential thermometry applications in the first biological window.
研究领域:
材料科学
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光学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2023
·
IF 3.9
Xiandi Yu,Qianshu Xia,Peng Liu,Yan Xu
Lanthanide-doped upconversion (UC) nanomaterials with zero background auto-fluorescence are of extensive interest in optical fields. Here, a NaYF 4 :Yb 3+ /Er 3+ @Zr-UiO-66 nanostructure was prepared by simultaneously encapsulating NaYF 4 :Yb 3+ /Er 3+ nanoparticles (NPs) and promoting the nucleation of UiO-66 under solvothermal condition. Traditional nanosize-surface induced defects and grain boundaries of NaYF 4 :Yb 3+ /Er 3+ upconversion nanoparticles (UCNPs) were greatly minimized; enabling a highly efficient energy transfer confirmed by the prolonged fluorescence lifetime and enhanced UC emission of NaYF 4 :Yb 3+ /Er 3+ @Zr-UiO-66 nanocomposite. The optical thermometry property of nanocomposite was investigated based on the fluorescence intensity ratio (FIR) technique in the temperature range of 303–393 K. The maximum relative temperature sensitivities (S r ) were calculated to be 1.02 and 0.73% K −1 based on a pair of thermally coupled energy levels (TCLs) of ( 2 H 11/2 → 4 I 15/2 , 4 S 3/2 → 4 I 15/2 ) and another pair of non-thermally coupled energy levels (NTCLs) of ( 2 H 11/2 → 4 I 15/2 , 4 F 9/2 → 4 I 15/2 ), respectively. Besides, it exhibited effective internal optical heating property due to the thermal excitation between the two adjacent TCLs of 2 H 11/2 and 4 S 3/2 in NaYF 4 :Yb 3+ /Er 3+ UCNPs as heated by increasing the laser power. This work demonstrates a feasible confined synthesis of NaYF 4 :Yb 3+ /Er 3+ @Zr-UiO-66 nanocomposite with extreme UC emitting performance, and it holds great potential acting as both ratiometric thermometer and optical heater for multifunctional applications.
研究领域:
材料科学
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光学工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2024
·Vol. 35
·期 18
·1251
·
IF 2.8
Zheng Jinjie,Shen Honglie,Li Yufang,Li Hechao,Yue Zhen
Novel efficient visible and near-infrared emitting phosphors NaY(MoO 4 ) 2 (NYM):Ln 3+ (Ln = Ce and Yb) were proposed in this work. The crystal structure, lattice vibration characteristics, morphology, and luminescent properties of NaY(MoO 4 ) 2 phosphors were described. Sensitization of Ln 3+ from the host with various doping concentrations was investigated. The yellow-green emission was achieved in Ce 3+ single-doped NYM phosphors at UV ultraviolet excitation sensitized by the MoO 4 2− group. Under UV excitation, characteristic emissions of Ce 3+ at 400–700 nm and Yb 3+ at 1000 nm of NYM:Ce,Yb were observed, enabling the spectral down-conversion applications. With the increasing concentration of Yb 3+ , the emission intensity as well as the lifetime of Ce 3+ decreased, confirming the energy transfer from Ce 3+ ions to Yb 3+ ions. And the energy transfer coefficient was 27% for NYM:0.01Ce,0.10Yb phosphor. These results indicate that the as-prepared phosphors have potential applications in optical and photonic devices.
研究领域:
材料科学
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光学材料
·
发光学
·
无机化学
·
光子学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Rui Yun,Jingqi He,Li Luo,Xiaohua Liu,Zhaogang Nie,Weiren Zhao,Hongli Wen
Upconverting materials excited by near-infrared light are getting attention due to their biological applications in cancer treatment. Er 3+ , Yb 3+ and Nd 3+ tri-doped LiLn(WO 4 ) 2 (Ln = Y/La/Gd) phosphors were synthesized via the typical solid-state method. LiGd(WO 4 ) 2 : Er 3+ , Yb 3+ , Nd 3+ (LGW) phosphors exhibit the most intense green emission under 785 nm excitation among the three doped host materials, which is ascribed to their lowest phonon density and the strong absorption properties. Nd 3+ and Yb 3+ concentration effect on its luminescent properties and the energy transfer of Nd 3+ →Yb 3+ →Er 3+ under 785 nm excitation are discussed. The ratio of integrated intensity from the 4 S 3/2 / 2 H 11/2 → 4 I 15/2 transition of Er 3+ is characteristic of the optical temperature sensing based on fluorescence intensity ratio (FIR). LGW shows high absolute sensitivity about 0.0070 K −1 at 439 K and broad temperature sensing ranging from 200 K to 600 K under the excitation of 785 nm compared with systems doped with Er 3+ . Our significant results predicate the potential applications of this lanthanum-doped tungstate in optical thermometers.
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
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
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纳米技术
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光学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2022
·
IF 9.224
Huocheng Lv,Peng Du,Weiping Li,Laihui Luo
To settle the challenges of optical thermometry with high sensitivity, a series of Tm3+/Yb3+-codoped Y2Mo3O12 (YMO:Tm3+/2xYb3+) submicron particles were developed via a sol–gel route. Excited by 980 nm, bright upconversion (UC) emissions of Tm3+ are observed, in which the optimum intensity is realized when the Yb3+ concentration is 13 mol %. Moreover, the UC mechanism of the emissions originating from the 1G4 level is a three-photon absorption process, while that of the emission from the 3F2,3 level is a two-photon absorption process. Furthermore, thermally enhanced emission intensities are realized in the studied compounds due to the negative thermal expansion effect. Notably, owing to the coexistence of improved energy transfer and cross-relaxation processes at elevated temperature, the intensities of the UC emissions from the 1G4 level increase and then decrease with raising the temperature, whereas that of the UC emission from the 3F2,3 level is enhanced monotonously as temperature increases. Via analyzing the inconsistent thermal quenching characteristics of the UC emissions, we explored the thermometric behaviors of the synthesized products and found that their sensitivities are dependent on the spectral mode. Through investigating the dependence of the emission intensity rate of the emissions from 3F2,3 → 3H6 to 1G4 → 3F4 transitions on temperature, one knows that the maximum absolute and relative sensitivities of the resultant submicron particles are 0.198 K–1 and 3.27% K–1, respectively. Additionally, the thermometric behaviors of YMO:Tm3+/2xYb3+ submicron particles can also be manipulated via altering the Yb3+ concentration.
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
Hang Liu,Ziyi Zhang,Jian Liu,Kailin Wang,Yuhong Zhang
In this paper, the upconversion(UC) and downshifting(DS) luminescence and thermal sensing performances of the CaIn 2 O 4: RE 3+ /Tm 3+ /Yb 3+ (RE=Er, Ho) phosphors are investigated in detail. The bright UC emission bands from 450 to 900 nm and the DS luminescence bands from 1000 to 1700 nm are obtained under 980 nm excitation. The typical near infrared(NIR) emisson band(∼1550 nm) of Er 3+ ions and the NIR emission band(∼1200 nm) of Ho 3+ ions are gained. The temperature sensing features of CaIn 2 O 4: RE 3+ /Tm 3+ /Yb 3+ (RE=Er, Ho) phosphors are investigated with the luminescence intensity ratio (LIR) technique. The results indicate that the maximum relative sensitivity (S Rmax ) of CaIn 2 O 4: Er 3+ /Tm 3+ /Yb 3+ sample reaches 1.576% K -1 at 313 K, and the S Rmax of CaIn 2 O 4: Ho 3+ /Tm 3+ /Yb 3+ sample reaches 0.797% K -1 at 353 K in UC range. In addition, the higher temperature measuring sensitivities have been obtained in NIR-II region with the DS luminescence of CaIn 2 O 4: RE 3+ /Tm 3+ /Yb 3+ phosphors. The above results indicate that the CaIn 2 O 4: RE 3+ /Tm 3+ /Yb 3+ phosphors show bright emission bands in visible and NIR-II, and higher sensitivity for temperature measurement. The CaIn 2 O 4: RE 3+ /Tm 3+ /Yb 3+ phosphors present great application in optical 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
Advanced Optical Materials
·
2016
·Vol. 4
·期 5
·798-806
·
IF 5.359
Enhai Song,Zitao Chen,Ming Wu,Sha Ding,Shi Ye,Shifeng Zhou,Qinyuan Zhang
In contrast to well-known multiple and fixed upconversion (UC) emission bands from lanthanide (Ln 3+ ) ions activated luminescent materials, room temperature wavelength-tunable single-band UC emissions are designed and demonstrated in Ln 3+ ions/transition metal Yb 3+ /Mn 2+ codoped fluoride perovskites ABF 3 (A = K + , Rb + , and Cs + ; B = Mg 2+ , Zn 2+ , and Cd 2+ ). Upon 976 nm laser excitation, the perovskites ABF 3 :Yb 3+ , Mn 2+ exhibit intense single band UC emission centered at 550–610 nm depending on the substitution of the A + and / or the B 2+ species in ABF 3 . Crystal structure and luminescent properties analysis show that the UC emission should originate from the transitions of super-exchange coupled Yb 3+ –Mn 2+ pair. The Stokes and UC emission properties, UC luminescence decay behaviors, as well as temperature dependent UC emission properties of ABF 3 :Yb 3+ , Mn 2+ are investigated and discussed in detail. The intense room (or high) temperature UC emission and ultralong UC decay lifetimes (≈25–45 ms) clearly reveal that the perovskites ABF 3 :Yb 3+ , Mn 2+ can be potentially applied in the fields of time-resolved luminescence imaging, lighting, and solid state lasers.
研究领域:
材料科学
·
光学材料
·
无机化学
·
光子学
·
固体物理
✓ 已验证
DOI
高影响因子
OPTICAL MATERIALS
·
2024
·
IF 3.8
Wanghui Xu,Xinghua Jia,Chunlin Dong,Li Liu,Wei Wang,Ting Yu
Cr 3+ activated broadband near-infrared (NIR) emitting phosphors have attracted more attention worldwide as they are strongly expected to be promising light convertors for phosphor-converted NIR light sources for NIR spectroscopy and imaging technologies. Herein, a new broadband NIR emitting phosphor Cr 3+ -doped Li 3 Sc(BO 3 ) 2 (LSBO) is introduced. Microcrystalline powders of LSBO doped with different Cr 3+ concentrations were synthesized by solid-state reactions and showed an NIR emission extending from 700 to 1100 nm with a peak at 830 nm upon excitation at 460 nm. The structure, concentration and temperature-dependent luminescence properties of LSBO:Cr 3+ phosphors were discussed in detail. The optical properties of Cr 3+ ions in LSBO were examined in terms of spectroscopic parameters. Moreover, efficient energy transfer from Cr 3+ to Yb 3+ was leveraged to significantly improve the NIR emission intensity and the thermal stability. The enhancement and energy transfer mechanisms have been discussed in detail. These results open up new ways to realize efficient NIR-emitting materials.
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 ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Linghui Shen,Tong Wei,Yongchao Shi,Hanyu Hao,Si Chen,Jiaguang Chen,Hao Guan,Qingjun Zhou,Zepeng Li
The various applications of luminescence materials were generally based on the effective modulation of luminescence spectra. However, the research on reversible spectral regulation of up-conversion (UC) luminescence materials was still in its infancy stage. In this work, a class of smart phosphor, Er 3+ and Yb 3+ -codoped SrBi 8 Ti 7 O 27 (SBYT: xEr 3+ ) intergrowth bismuth layer-structured ferroelectric , possessing fast sensitivity to visible light irradiation, was reported based on visible light driven photochromic effect. Through the alternate stimuli of light irradiation and heating treatment, the reversible regulation of UC luminescence was achieved accompanying with the switching of coloration and decoloration processes. The luminescence modulation degree tightly relied on the irradiation time and thermal treatment modes. The reversibility and stability properties were also revealed. Moreover, it is found that polarization treatment was an effective approach which can be adopted to improve the UC luminescence contrast. The maximum luminescence modulation ability of SBYT: xEr 3+ reached up to 81.3% which was 131% of that un-polarized sample. It is believed that SBYT: xEr 3+ ceramics can act as a promising candidate for optical data storage and anti-counterfeiting applications.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
PHYSICA B-CONDENSED MATTER
·
2025
·
IF 2.8
Chen Fan,Xiangping Li,Yan Li,Jiani Luo,Lei Li,Hongquan Yu,Baojiu Chen
Bi 2 Mo 2 O 9 : Yb 3+ /Tm 3+ /Ho 3+ phosphors were synthesized via solid-state reaction method. Structural characterization confirmed phase purity and effective rare-earth incorporation into the host lattice. Under 980 nm excitation, the materials exhibited distinct emission bands corresponding to Tm 3+ (477 and 690 nm) and Ho 3+ (542 and 657 nm). Through optimization of Ho 3+ concentration (0.5 mol%), white-light upconversion emission was obtained with CIE 1931 coordinates of (0.3147, 0.2805). Using fluorescence intensity ratio technique based on non-thermally coupled energy levels of Tm 3+ ( 1 G 4 ) and Ho 3+ ( 5 F 5 ), it was found that the material had excellent temperature sensing performance, achieving maximum sensitivities of 21.74 %K −1 (absolute) and 1.892 %K −1 (relative). Remarkably, the material exhibits temperature-dependent chromaticity shifts from white (303 K) to yellow (483 K), enabling visual temperature indication. The findings demonstrate that Bi 2 Mo 2 O 9 : Yb 3+ /Tm 3+ /Ho 3+ phosphors exhibit promising prospects in optical thermometry and thermally-responsive luminescent devices, particularly in scenarios where thermally-driven color variations are advantageous or tolerable.
研究领域:
材料科学
·
光学物理
·
纳米技术
·
固态照明
·
温度传感
✓ 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）