CERAMICS INTERNATIONAL
·
2026
·
IF 6
Liang Zhao,Jiaxin Yang,Yujia Peng,Wudeng Wang,Desheng Li,Hai Lin
High contrast is realized via switchable excitation in Ho 3+ /Yb 3+ co-doped molybdates. • Electrospun PMMA/TPU binary networks achieved fiber-welding for 400% stretchability. • Hydrophobic encapsulation with a large contact angle impedes moisture ingress. • Excellent thermal stability is verified by 90% retained emission intensity at 373 K. • Strain sensing and dual-mode encryption broaden application prospects for smart skin. Smart adaptive optoelectronic skins represent a critical foundation for next-generation wearable electronics, spurring extensive research into intelligent platforms that simultaneously harness mechanical compliance and excitation-dependent emissions to execute complex, multi-level security interactions. Pristine microcrystalline Li 2 Gd 4 (MoO 4 ) 7 : Ho 3+ /Yb 3+ phosphors display dual-mode emissions, yielding green under near-ultraviolet excitation and orange-red under 980 nm irradiation due to tailored energy transfer pathways, yet inherent structural brittleness completely prevents their direct deployment in flexible configurations. Overcoming this fundamental bottleneck relies on encapsulating these phosphors via electrospinning within a binary polymeric blend consisting of polymethyl methacrylate and thermoplastic polyurethane, yielding hybrid fibrous networks with exceptional stretchability up to 400% elongation driven by microscopic fiber-welded junctions optimizing tensile load distribution. Crucially, sophisticated multi-environmental modulation is manifested within these flexible scaffolds, where the photoluminescence intensity is dynamically governed by tensile strain due to shifting spatial densities, while this dense polymeric network maintains stable luminescence at 373 K and provides a superior hydrophobic barrier maintaining static water contact angles beyond 100°. Synergizing this strain-responsive sensing with the excitation-switchable dual-color outputs enables successful dual-functional integration of precise kinesiologic tracking and multi-level information cryptography, paving a promising way for self-supported smart skins and advanced optical information security.
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DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2022
·
IF 4.171
Anming Li,Ranhua Lu,Yongzhe Zhao,JieJie Yang,Junli Wang,Gao Zhao
In recent years, upconversion photoluminescent micro/nanocrystals with unique anti-Stokes luminescence properties have shown high application value in many relevant fields. In this work, pure tetragonal phase NaLa(MoO 4 ) 2 :Yb 3+ /Ho 3+ microspheres have been synthesized by a solvothermal method in the presence of oleic acid and 1-octadecene. Under the excitation of 980 nm laser, NaLa(MoO 4 ) 2 :Yb 3+ /Ho 3+ microcrystals emit red, green and near infrared upconversion luminescence with peak wavelengths at 660/643 nm, 541 nm, and 756 nm. Based on the analysis of excitation power-dependent upconversion luminescence intensities and energy level diagram of Yb 3+ /Ho 3+ , electronic transition pathways in the energy transfer processes for upconversion luminescence of NaLa(MoO 4 ) 2 :Yb 3+ /Ho 3+ microcrystals are studied. For red upconversion luminescence at 660/643 nm, the predominant population pathway to state 5 F 5 (Ho 3+ ) is “Yb 3+ ( 2 F 5/2 ) + Ho 3+ ( 5 I 7 ) → Yb 3+ ( 2 F 7/2 ) + Ho 3+ ( 5 F 5 )”. While, “Yb 3+ ( 2 F 5/2 ) + Ho 3+ ( 5 I 6 ) → Yb 3+ ( 2 F 7/2 ) + Ho 3+ ( 5 F 4 / 5 S 2 )” process accounts for the population of state 5 F 4 / 5 S 2 (Ho 3+ ) for radiative transitions of upconversion luminescence at 541 and 756 nm. Energy back transfer contributes to the intense red upconversion luminescence at 660/643 nm. These electronic transition pathways in energy transfer processes are further confirmed by the analyses based on energy level mismatch and luminescent lifetimes.
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DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2026
·
IF 3.8
Xi Chen,Xiyong Chen,Hui Fu,Qiming Huang,Jialiang Jiang,Zhentao Du,Jialong Zhao,Weiyou Yang,Kanybek Osmonaliev,Samat Toktogonov,Jinju Zheng
Dual-band near-infrared (NIR) phosphors simultaneously covering the NIR-I (700-1000 nm) and NIR-II (1000-1700 nm) windows are highly desirable for practical optoelectronic devices, yet conventional rare-earth doped systems typically rely on ultraviolet sensitization. Herein, we report Yb 3+ /Er 3+ co-doped Cs 2 NaHoCl 6 double perovskite microcrystals (MCs) synthesized via a green aqueous-phase evaporation method, in which the intrinsic ∼450 nm absorption of Ho 3+ serves as a self-sensitizer, enabling competitive energy transfer from Ho 3+ to Yb 3+ and Er 3+ , predominantly via dipole-dipole interactions. This generates efficient dual-band emissions at 985 nm (NIR-I) and 1540 nm (NIR-II), with a high photoluminescence quantum yield (PLQY) of 85.6% under blue-light excitation, alongside excellent thermal stability and photostability. An NIR phosphor-converted light-emitting diode (pc-LED) fabricated with the optimized phosphor demonstrates practical utility in night vision, non-destructive detection, and high-contrast biological imaging. This work establishes an eco-friendly route for mass-producing efficient dual-band NIR emitters directly compatible with commercial blue LED chips.
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Shoujun Ding,Kaiming Kan,Shujing Pan,Wenzhi Su,Yong Zou,Qingli Zhang
Yb 3+ and Ho 3+ co-doped AB(MoO 4 ) 2 (A = Na, Li, K; B = Y or Bi) single crystals were successfully grown by the Czochralski method, and the effects of Li + and K + doping on the structural and optical properties of NaY(MoO 4 ) 2 (NYM) crystals were systematically investigated. The crystals confirmed with zircon-type tetragonal structure (space group 4). First-principle calculations revealed the band structure features of NYM crystals and elucidated the differences in bandgap and oxygen defect formation compared with NaBi(MoO 4 ) 2 (NBM). Judd-Ofelt calculations were conducted and the spectral transition properties of Ho 3+ were revealed. Photoluminescence studies demonstrated that the crystals exhibited high-purity red down-conversion emission under 450 nm excitation and typical two-photon up-conversion green emission under 980 nm excitation. Li + /K + doping effectively suppressed the green emission and enhanced the red component, with a more pronounced effect for K + . Temperature-dependent spectra (300-540 K) indicated good repeatability and thermal stability, with the K + -doped crystal retaining 55% of its room-temperature emission intensity at 540 K. The activation energies derived from temperature-dependent spectra suggest that Li + and K + incorporation significantly improved thermal stability. Furthermore, optical thermometry analysis revealed that Li + and K + doping significantly enhanced the optical sensing sensitivity. Fluorescence decay curves suggested that Li + and K + doping increased lattice disorder, suppressed Ho 3+ -Ho 3+ cross-relaxation, and consequently modified the red-to-green emission ratio. These results indicate that Yb,Ho:NYM crystals and their Li + /K + -doped counterparts exhibit outstanding performance in optical anti-counterfeiting, near-infrared solid-state lasers and optical thermometry applications.
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产品关联
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
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2020
·Vol. 31
·期 12
·9321-9327
·
IF 2.22
Liu Zhen,Chen Dihu
The mixtures of Gd 2 O 3 :Yb 3+ /Er 3+ and Gd 2 O 3 :Yb 3+ /Ho 3+ nanoparticles were successfully prepared via pulsed laser ablation in liquid followed by solution mixing. Under excitation of 980 nm diode laser, tunable color from green to red emission was achieved. Based on the thermal linked energy levels, the temperature sensitive upconversion emission was observed. The fluorescence intensity ratio ( FIR ) of I 513–530 nm / I 530–580 nm increased as the elevation of temperature. The absolute sensitivity and relative sensitivity were derived from temperature dependent FIR . The results show that the mixture of Gd 2 O 3 :Yb 3+ /Er 3+ and Gd 2 O 3 :Yb 3+ /Ho 3+ nanoparticles are not only potential candidates for multicolor upconversion luminescence but also promising optical materials for non-contact optical thermometry.
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DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2017
·
IF 2.686
Haoyue Hao,Hongyu Lu,Guanghong Ao,Yinglin Song,Yuxiao Wang,Xueru Zhang
The nearly pure green and red emissions of Ho 3+ /Yb 3+ co-doped Gd 2 (MoO 4 ) 3 were realized by tri-doping Eu 3+ and Ce 3+ , respectively. The Ho 3+ /Yb 3+ co-doped Gd 2 (MoO 4 ) 3 powder, radiating intense green and red emissions, was prepared by a typical sol-gel method. Under the excitation of 980 nm laser, the red-to-green ratio was tuned from 0.2 to 4 as the concentration of Eu 3+ changed from 6 to 0 mol%, attributed to the energy transfer processes between Ho 3+ and Eu 3+ . Meanwhile, the red-to-green ratio altered from 4 to 20 as the concentration of Ce 3+ changed from 0 to 20 mol% via the cross relaxing processes between Ho 3+ and Ce 3+ . The prepared phosphors, possessing large tuning range of red-to-green ratio and resisting high temperature, can be potentially applied to colorful display and solid-state lighting.
研究领域:
材料科学
·
光学材料
·
光子学
·
固态照明
·
显示技术
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Tao Pang,Mingyue Cai,Qiqi Chen,Jianping Xie,Ronghua Jian,Wenhui Lu
NaYF 4 :Yb 3+ /Ho 3+ /Ce 3+ upconversion phosphors were synthesized by using a citric acid assisted hydrothermal method . Both increasing the concentration of Ce 3+ and decreasing the Yb 3+ content are beneficial to the formation of cubic NaYF 4 . When the concentration of Yb 3+ /Ho 3+ /Ce 3+ were 20/1/20 and 5/1/10, respectively, a pure cubic phase was obtained. The spectral conversion from green to red was achieved by first increasing Ce 3+ concentration to 10% and then decreasing the Yb 3+ concentration to 5%. In the first half, the two cross relaxation processes between Ho 3+ and Ce 3+ were responsible for the modulation of the luminescence, while in the latter half, the enhanced intensity ratio of red to green emission was related to the decreased energy transfer from Ho 3+ to Yb 3+ . Except for the sample doped with 5% Yb 3+ , 1% Ho 3+ and 10% Ce 3+ , the total emission intensity of other samples decreased linearly with increasing sample temperature. The maximum responsibility was obtained in the case of 20% Yb 3+ , 1% Ho 3+ and 5% Ce 3+ doping. Compared to the Er 3+ based luminescent temperature sensing, this novel temperature sensing not only shown little impact from pump power, but also had the identical sensitivity at various temperatures, and thus being a promising candidate for temperature sensing.
研究领域:
材料科学
·
光学
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Shuai Hu,Maohui Yuan,Hanchang Huang,Changqing Song,Kai Han,Wenda Cui,Zining Yang,Hongyan Wang
Flame aerosol synthesis (FAS) is an excellent strategy for continuous, fast, and mass production of small-size upconversion nanoparticles (UCNPs), which have high potential applications in fields like biological imaging, colour display and optical temperature sensing. However, flame-made UCNPs have received less attention, and relevant studies are limited. Herein, for the first time, we successfully fabricated cerium (Ce)-doped homogeneous ultrasmall Y 2 O 3 :Yb 3+ /Ho 3+ UCNPs using a liquid-fed FAS method. Ce was doped to improve the upconversion luminescence (UCL) of the Y 2 O 3 :Yb 3+ /Ho 3+ UCNPs. The overall UCL intensity was enhanced ∼77.9-fold for an optimal concentration of 20 mol% Ce-doped UCNPs, compared with the UCNPs without Ce doping with a relatively homogeneous ultrasmall size of 8–10 nm. Further studies confirmed that both trivalent (Ce 3+ ) and tetravalent (Ce 4+ ) simultaneously exist in the Y 2 O 3 hosts and are critical in enhancing the UCL properties. In addition, the fluorescence intensity ratio (FIR) method was used to evaluate the thermal properties of the fabricated UCNPs. Ce doping significantly improved the thermal sensitivity of Y 2 O 3 :Yb 3+ /Ho 3+ UCNPs. An excellent relative sensitivity ( S R ) of 0.622% K −1 at 598 K was obtained for flame-made UCNPs doped with 20 mol% Ce.
研究领域:
材料科学
·
光学
·
纳米技术
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产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2023
·Vol. 52
·期 21
·7322-7329
·
IF 4
Chengyu Zhuo,Zeyu Lyu,Dashuai Sun,Sida Shen,Taixing Tan,Shuai Wei,Zhijun Li,Pengcheng Luo,Hongpeng You
Na2MgScF7 (NMSF) was experimentally obtained for the first time by combining hydrothermal and high-temperature solid-state reactions. X-ray powder diffraction (XRD) combined with Rietveld refinement confirms that NMSF is crystallized in the space group Imma with the cell parameters a = 10.40860(18), b = 7.32804(12) and c = 7.52879(11) Å, α = β = γ = 90° and V = 574.256(24) Å3. Through doping with Tb3+ or Eu3+ ions, downshifting yellow-green or red emission could be achieved in NMSF-based phosphors, respectively. Upconversion emission could also be designed by doping with Yb3+–Er3+, Yb3+–Tm3+, Yb3+–Ho3+ or Er3+. Moreover, the NMSF:Er3+ phosphor exhibited green upconversion emission upon excitation at 980 nm, and it exhibited red emission upon excitation at 1532 nm. Finally, recognizable patterns were obtained under excitation at 254, 365 and 980 nm, indicating that the as-prepared phosphors can be applied to multicolor anti-counterfeiting. Moreover, our synthesis strategy opens up new avenues for the synthesis of novel fluorides.
研究领域:
材料科学
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光学
·
化学
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DOI
PubMed
高影响因子
JOURNAL OF SOLUTION CHEMISTRY
·
2020
·Vol. 49
·期 2
·166-178
·
IF 1.273
Zhu Liqing,Liu Bijun,Yang Xia,Zhuo Liangang,Mu Wanjun,Chen Yue,Yang Yuchuan,Wei Hongyuan,Li Xingliang
Thermodynamic equilibria of complexes of 1,3-diamino-2-hydroxypropane- N , N , N ', N '-tetraacetic acid (DHPTA) with heavy lanthanides (Tb 3+ , Ho 3+ and Lu 3+ ) in aqueous solution have been investigated with potentiometry, spectrophotometry, luminescence spectroscopy and nuclear magnetic resonance spectroscopy (NMR). The results identified three 1:1 Ln/DHPTA (Ln: Tb 3+ , Ho 3+ and Lu 3+ ) complexes with different degrees of deprotonation, LnL − , Ln(H −1 L) 2− , and Ln(OH)(H −1 L) 3− , where H −1 represents the deprotonation of the hydroxyl group between two methyliminodiacetate groups in the DHPTA structure. The alkoxide form of the DHPTA hydroxyl group directly binds to the lanthanide atom, forming highly strong chelation. The complex of Ln(H −1 L) 2− could be present as a dimeric or polymeric complex in solution.
研究领域:
配位化学
·
无机化学
·
物理化学
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DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2024
·
IF 4.3
Yuhong Zhang,Hongqun Zhu,Xuezhong Yang,Haoran Wang,Qiang Wang,Chunhui Sun,Haozhou Tian,Hang Liu
Here, the Sr 2 LaNbO 6 : Yb 3+ /Nd 3+ /Ho 3+ phosphors are prepared through solid-state route. The upconversion (UC)/downshifting (DS) luminescence and temperature performances of all samples are investigated in detail. Under 808 nm excitation, the infrared emission band (∼2000 nm) of Ho 3+ ions is obtained. Especially, the energy transfer process of Nd 3+ → Yb 3+ → Ho 3+ has increased the emission intensity of ∼2000 nm. Moreover, the infrared emission band presents thermal enhancement. Under 980 nm excitation, the UC emission band 500–960 nm is investigated. The green and red light of Ho 3+ ion, near infrared light of Nd 3+ ions are achieved. In addition, the possible luminescence mechanism of Sr 2 LaNbO 6 : Yb 3+ /Nd 3+ /Ho 3+ phosphor is discussed. At last, the optical temperature sensing characteristics of the phosphor are studied according to the luminescence intensity ratio (LIR) technology. The maximum relative sensitivity of Sr 2 LaNbO 6 : Yb 3+ /Nd 3+ /Ho 3+ reaches 5.476 % K −1 at 293 K. These results prove that the Sr 2 LaNbO 6 : Yb 3+ /Nd 3+ /Ho 3+ phosphor presents the luminescence in infrared and visible range. The Sr 2 LaNbO 6 :Yb 3+ /Nd 3+ /Ho 3+ phosphor also can be applied to design optical temperature sensor.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
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