SENSORS AND ACTUATORS A-PHYSICAL
·
2025
·
IF 4.9
Quanwang Niu,Junwen Yu,Xiyuan Chen,Xiaohong Yan,Xiangfu Wang
Optical approaches for logic operations and sensing, compared with traditional electrical systems, possess advantages of rich tunability and multi-environmental stimulus response. In this study, Eu 3 + /Dy 3+ -doped Y 2 Mo 3 O 12 phosphors are investigated, focusing on their photoluminescence intensity enhancement as the temperature increases. Based on these properties, multiple functional systems were designed and implemented. These include light and thermal input logic circuit system achieved by modulating emission intensities, and a spatially encoded matrix capable of performing six different logic operations. Furthermore, an optical thermometer utilizing fluorescence intensity ratio variations and a dual-modal sensor integrating optical temperature detection with electrical pressure sensing, exhibiting minimal signal crosstalk, were developed. These results suggest that Y 2 Mo 3 O 12 : Eu 3+ , Dy 3+ phosphors hold great potential for advanced optoelectronic logic and sensing applications.
研究领域:
光电材料
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智能传感器
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功能荧光材料
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温度与压力传感
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光学逻辑电路
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Sayed Ali Khan,Abdul Jalil,Qudrat Ullah Khan,Rana Muhammad Irfan,Ikhtisham Mehmood,Karim Khan,Maryam Kiani,Binbin Dong,Noor Zamin Khan,Jun-Ling Yu,Ling Zhu,Simeon Agathopoulos
A novel single-phase white-light-emitting YPO 4 phosphor, single and co-doped with Dy 3+ /Eu 3+ , aiming at UV-pumping in white-light-emitting diodes (WLEDs) which exhibits an outstanding optical performance, was successfully produced. The crystal structure, the morphology, the electronic band structure , the electronic configuration, and the bond length of the prepared phosphors were thoroughly investigated, both experimentally and by computational methodology. The results showed that the host lattice provides various surrounding environments to the Eu 3+ activators is a results of Eu 3+ single and Dy 3+ /Eu 3+ co – doped YPO 4 phosphors. Under ultra-violet (UV) excitation (353 nm), the prepared tetragonal phase YPO 4 :Dy 3+ phosphors emitted a bluish-white-light because it has peaks of similar intensity in the blue and the yellow spectral region . The emission spectrum can be tuned from bluish white to green/yellow/red and warm white by adjusting the concentration of Tb 3+ /Eu 3+ dopants . A high photoluminescence quantum yield (PLQYs) 68.55% was achieved. It was observed that the tetragonal YPO 4 :Tb 3+ /Dy 3+ /Eu 3+ phosphors emit-white-light which covers the whole visible region, and have good thermal stability from 20 to 200 °C. Finally, a WLED was fabricated by using a UV LED (365 nm) chip coated with the optimized YPO 4 :Tb 3+ /Dy 3+ /Eu 3+ single-phase phosphor, demonstrating an excellent white-light emission with a high CRI value (R a = 92) and a low CCT value (T c = 2497 K). Hence, the produced material is a promising candidate for UV-pumped single-phase phosphor-converted WLEDs.
研究领域:
材料科学
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光学工程
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无机化学
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固体物理
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光电子学
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功能材料
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照明技术
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2018
·Vol. 53
·期 9
·6414-6423
·
IF 2.993
Hu Zeqing,Guo Yan,Zhang Jinghui,Zhang Yanjie
The novel Ca 4− x (PO 4 ) 2 O: xDy 3+ and Ca 4− x − y (PO 4 ) 2 O: xDy 3+ , yEu 2+ multi-color phosphors were synthesized by traditional solid-state reaction. The crystal structure, particle morphology, photoluminescence properties and energy transfer process were investigated in detail. The X-ray diffraction (XRD) results demonstrate that the products showed pure monoclinic phase of Ca 4 (PO 4 ) 2 O when x < 0.1. The scanning electron microscopy (SEM) indicated that the phosphors were grain-like morphologies with diameters of ~ 3.7–7.0 μm. Under excitation of 345 nm, Dy 3+ -doped Ca 4 (PO 4 ) 2 O phosphors showed multi-color emission bands at 410, 481 and 580 nm originated from oxygen vacancies and Dy 3+ . Interestingly, Ca 4 (PO 4 ) 2 O: Dy 3+ , Eu 2+ phosphors exhibited blue emission band at 481 nm and broad emission band from 530 to 670 nm covering green to red regions. The energy transfer process from Dy 3+ to Eu 2+ was observed for the co-doped samples, and the energy transfer efficiency reached to 60% when Eu 2+ molar concentration was 8%. In particular, warm/cool/day white light with adjustable CCT (2800–6700 K) and high CRI ( R a > 85) can be obtained by changing the Eu 2+ co-doping contents in Ca 4 (PO 4 ) 2 O: Dy 3+ , Eu 2+ phosphors. The optimized Ca 3.952 (PO 4 ) 2 O: 0.04Dy 3+ , 0.008Eu 2+ phosphor can achieve the typical white light with CCT of 4735 K and CRI of 87.
研究领域:
材料科学
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光学材料
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发光学
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荧光粉化学
·
固态照明
✓ 已验证
DOI
高影响因子
OPTICAL MATERIALS
·
2025
·
IF 4.2
Li Wang,Zhichao Jin,Zhongli Zhu
The SiO 2 –B 2 O 3 –Bi 2 O 3 –CaO (SBBC) luminous glass samples, co-doped with Tm 3+ , Dy 3+ , and Eu 3+ ions, were prepared. Upon 362 nm stimulation, the co-activated SBBC glasses exhibited distinct spectral transitions corresponding to Tm 3+ : 1 D 2 → 3 F 4 , Dy 3+ : 4 F 9/2 → 6 H 15/2 , 13/2 , as well as Eu 3+ : 5 D 0 → 7 F 2 in the 400–700 nm. Moreover, the study identified two significant energy transfer mechanisms, Dy 3+ →Tm 3+ and Dy 3+ →Eu 3+ , which contribute to the enhanced photoluminescence of the glasses. The optimal CIE coordinates were determined to be (0.3312, 0.3436), with CCT of 5552 K, as well as color purity of 2.55 %. Importantly, an investigation into the thermal stability of selected glass revealed an impressive ΔT of 140 °C. This study shows the potential value of glass in the field of W-LED.
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Ou Hai,Peng Li,Xin An,Weikang Dong,Tong Li,Zechuan Qi,Yuanting Wu
In order to broaden the application field of long afterglow materials, it is a challenge to realize high stability and multicolor properties of long afterglow materials. The photoconversion method is a condition that enables simultaneous afterglow color shifts, however, the stable and efficient photoconversion agent is an urgent problem. This study propose a strategy to synthesize CsPbBr 3 quantum dots (QDs) directly within porous SiO 2 on the surface of Sr 2 MgSi 2 O 7 :Eu 2+ ,Dy 3+ (SMS). The resulting composites achieve a shift in emission and afterglow color from blue (about 468 nm) to green (about 520 nm), and in the UV irradiation for 8 days, the luminous intensity is almost unaffected, in the air exposure for 3 months, the luminous intensity can still be maintained at more than 80 % of the initial value. Since the synthesized composite material is a powder, it can be mixed with various media. Composite materials can be homogeneously mixed with coatings, resulting in coatings with a variety of luminescent colors and producing effective multicolor luminescence, which has significant potential in the field of luminescent coatings and anti-counterfeiting.
研究领域:
材料科学
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光学
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产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2019
·Vol. 7
·期 32
·19173-19186
·
IF 10.733
Xiaoming Liu,Xueya Chen,Yizu Li,Bingquan Wu,Xubiao Luo,Sheng Ouyang,Shenglian Luo,Abdulaziz A. Al Kheraif,Jun Lin
Here, we demonstrate a g-C3N4@Au@SrAl2O4:Eu2+,Dy3+ composite as a novel efficient self-luminous visible-light plasmonic photocatalyst for photocatalytic degradation of organic pollutants and hydrogen evolution from water around the clock. The g-C3N4@Au@SrAl2O4:Eu2+,Dy3+ composite was prepared by integrating a g-C3N4@Au plasmonic photocatalyst composite with a SrAl2O4:Eu2+,Dy3+ long-afterglow phosphor through a simple Pechini-type sol–gel method followed by a mechanical mixing and high-temperature calcination process. Owing to the synergistic effect of surface plasmon resonance of the Au nanoparticles in g-C3N4 and long-lasting phosphorescence of the SrAl2O4:Eu2+,Dy3+ phosphor, the prepared g-C3N4@Au@SrAl2O4:Eu2+,Dy3+ composite shows a continuous and efficient photocatalytic activity for photocatalytic degradation of organic pollutants and hydrogen evolution from water in a sunless environment. The current research study could provide a new strategy for designing a highly efficient composite photocatalyst for solar environmental purification and hydrogen energy production around the clock.
研究领域:
光催化
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环境科学
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材料科学
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可再生能源
·
纳米技术
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Xiao-hu Ma,Si-yuan He,Zhe-rui Zhang,Zhe Meng
Persistent light-emitting materials (PLMs), which have the potential to store and release light energy after light irradiation, are receiving increasing attention for their role in prolonging the lifetime of photogenerated electrons for the development of photocatalysts with round-the-clock applications. In this paper, a double S-scheme Sr 2 MgSi 2 O 7 :Eu 2+ ,Dy 3+ /ZnIn 2 S 4 /UiO-66-NH 2 (SZU) heterojunction with round-the-clock catalytic activity was prepared by hydrothermal self-assembly method. The photocatalytic performance of the SZU heterojunction for RhB(MB) degradation was significantly improved compared with the pristine ZnIn 2 S 4 and UiO-66-NH 2 . The SZU heterojunction has excellent catalytic degradation performance for RhB (MB), and the removal rate of RhB (MB) reaches 72.2 % (81.7 %) after visible light irradiation for 40 (60) minutes. After the end of light, the total removal rate of RhB (MB) reached 86.7 % (96.8 %) when the catalysis continued for several hours under dark conditions, which was 14 % and 15 % higher than that under visible light irradiation, respectively. Based on the characteristics of SMS photoluminescence, combined with a large number of photocatalytic experiments, The sustained photocatalytic activity was enhanced under both daytime and darkness conditions, not only because of the production of SZU complexes, which prolonged the visible light response of ZnIn 2 S 4 , but also because of the construction of double S-scheme heterojunctions, which facilitates the light storage capacity, charge transfer, and the separation of photo-induced charge carriers and effectively promoted the photocatalytic activity of the photocatalysts. This work contributes to a deeper understanding of the design of round-the-clock photocatalysts, and provides a useful exploration for the practical application of photocatalytic technology.
研究领域:
材料科学
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环境科学
·
光催化技术
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产品关联
DOI
高影响因子
SCANNING
·
2021
·
IF 1.932
Zhongjin Ni,Tianyu Fan,Shuyang Bai,Shiyu Zhou,Yan Lv,Yihua Ni,Bin Xu
We report luminous polylactic acid (PLA) composite prepared via a solvent casting method using different amounts of phosphor strontium aluminate (SrAl2O4: Eu2+ and Dy3+) (SAO). The reason for doing this is that the changes of fluorescence and mechanical properties in the composites with different SAO contents can be directly evaluated. The SAO particles should have a variety of excellent characteristics in the PLA matrix, among which dispersibility and compatibility are particularly important; so, they can be modified by 3-aminopropyltriethoxysilane (APS) to achieve the target characteristics. The results showed that the fluorescence and mechanical properties were affected by SAO addition. The mechanical properties significantly improved with 5 wt% SAO; further, addition had no impact. And the emission band of fluorescence and phosphorescence is just at the peak of 524 nm. The composites with 15 wt% SAO have the best fluorescence properties. The fluorescence decreased with further doping. Fluorescence decay curves with various amounts of SAO particles show a similar tendency as pure SAO particles; the speed of decrease in afterglow intensity was higher for the first 30 min. In addition, the detailed morphological scanning and study by scanning electron microscope (SEM) showed that the particles had good adhesion to the matrix. In conclusion, the concentration of SAO into the PLA matrix impacts the fluorescence and mechanical properties of a SAO/PLA composite material.
研究领域:
材料科学
·
聚合物科学
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发光材料
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复合材料
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DOI
PubMed
高影响因子
JOURNAL OF NON-CRYSTALLINE SOLIDS
·
2017
·
IF 2.124
Quan Guo,Yantao Xu,Haitao Guo,Xusheng Xiao,Changgui Lin,Xiaoxia Cui,Pengfei Wang,Fei Gao,Min Lu,Bo Peng
A serial (100 − x)Ge 25 Sb 10 S 65 -xI (x = 0, 5, 10, 15, 20, 25 and 30 wt%) chalcohalide glasses and ones doped with 0.1 wt% Dy 3 + rare-earth ions were synthesized and their structural, thermal and optical properties were systematically studied. It indicates that addition of I 2 into Ge 25 Sb 10 S 65 glass significantly decreases the connectivity of glass network and average bond energy, and modifies the associated properties. The glass transition temperature and refractive index decrease monotonically, and the density increases almost linearly with the increasing of iodine content in glass. The thermal stability is improved, which has a maximum of ΔT max = 174 °C. While the optical bandgap has a peak value at x = 10 wt%. The absorption spectra and mid-infrared fluorescence spectra of Dy 3 + rare-earth ions doped glasses were investigated together with the Judd-Ofelt analysis. GeS 2 nano-crystals were found in the sample with x ≥ 15 wt%, which is supposed to induce enhancements of mid-infrared fluorescence at 2.95 and 4.32 μm.
研究领域:
材料科学
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光学
·
固体物理学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
CRYSTAL GROWTH & DESIGN
·
2025
·
IF 3.4
Kaiting Wu,Pengju Xia,Chengyu Ni,Wanyuan Li,Man Xu,Wubin Dai
In pursuit of illumination-grade wLEDs, innovative red-emitting phosphors with sufficient luminance and thermal stability are required. Herein, a Eu3+-incorporated Ba2CaB2Si4O14 (BCBS) phosphor, exhibiting relatively low efficiency, poor thermal stability, and red line peak photoluminescence (PL) at 614 nm, is preliminarily obtained as a result of Eu3+ 4f–4f transitions. The Rietveld refinements and density functional theory (DFT) calculations indicate that Eu3+ is energetically favored in Ca2+ sites. To overcome the above issues of BCBS: Eu3+, heterovalent Dy3+ is codoped into the phosphor to simultaneously realize: (i) ultrahigh thermal stability of red PL based on structure tailoring and trap regulation associated with both Dy(Eu)Ca• and VO″ defects. For comparison, by tridoping Na+ at the expense of Dy(Eu)Ca• via Dy(Eu)3+ + Na+ → 2Ca2+, the red PL performance is becoming very bad and even worse than that of BCBS: Eu3+, indicating that Dy(Eu)Ca• plays a major role, though the effect of VO″ cannot be completely ruled out, (ii) energy transfer (ET) from Dy to Eu for enhancing PL efficiency/intensity, and (iii) color-tunable PL, including “warm” white light, by combination of both autologous “cool” white PL from Dy and red emission from Eu. The assembled phosphor-converted white light-emitting diode (pc-wLED), adopting single-phase BCBS: Dy3+/Eu3+ with n near UV (nUV) LED chip via a remote “capping” packaging strategy, is a promising candidate to be applied as a white-emitting phosphor in wLEDs. Meanwhile, due to a strong mutual relationship between the intensity ratios of PL bands from magnetic/electric dipole transitions (EDT/MDT) for either Dy (Y/B) or Eu (R/O) and the crystal field environment, the obviously visual PL color change under distinct pressures in a wide range of pressure fluctuations indicates that the phosphor could also be used as a potentially optical pressure sensor with high sensitivity.
研究领域:
材料科学
·
光学工程
·
物理学
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产品关联
DOI
高影响因子
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