JOURNAL OF NON-CRYSTALLINE SOLIDS
·
2021
·
IF 3.531
Shuhang Tian,Yipeng Lun,Yongsheng Sun,Dongdan Chen,Guowu Tang,Qi Qian,Zhongmin Yang
In this work, strong yellow emission was obtained in Dy 3+ doped multi-component phosphate glass due to its high asymmetry and covalency of the local field and high phonon energy. The internal quantum efficiency was measured to be 39.27% and the figure of merit was calculated to be 210.53 pm 2 × μs. What is more, silicate-clad Dy 3+ doped multi-component phosphate core glass fiber was successfully drawn by using a rod-in-tube method, which has a strong fluorescence emission in yellow spectra band. The Dy 3+ doping concentration is 2.6 wt.%, which is much larger than that of Dy 3+ doped (0.2 wt.%) ZBLAN fiber. These results suggest that the silicate-clad Dy 3+ doped multi-component phosphate glass fibers are potential host matrices for yellow laser.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
RSC Advances
·
2019
·Vol. 9
·期 16
·9244-9252
·
IF 3.049
Mao Xia,Simin Gu,Cheng Zhou,Longhai Liu,Yuan Zhong,Yongli Zhang,Zhi Zhou
Plant growth LEDs have attracted broad attention in modern society, desperate for specific phosphors with a characteristic emission band. A novel Mn4+ and Dy3+ co-doped Y3Al4GaO12 phosphor were successfully prepared through a conventional high-temperature solid-state reaction. A three band emission including red (625–700 nm), orange (550–607 nm) and blue (462–490 nm) is observed in these phosphors when excited under a near-UV lamp, which is ascribed to 2E → 4A2 of Mn4+, 4F9/2 → 6H15/2 and 4F9/2 → 6H13/2 of Dy3+, respectively. The three emissions match the absorption spectra of chlorophyll A and chlorophyll B well. Meanwhile, the energy transfer from Dy3+ to Mn4+ was confirmed by the luminescence spectra and lifetime analysis. Finally, an LED device was fabricated that consisted of a 365 nm ultraviolet chip and the Y3Al4GaO12:Mn4+,Dy3+ phosphor. The excellent properties indicate that the synthesized phosphor has a promising application in the optical agricultural industry.
研究领域:
材料科学
·
农业光学
·
植物生理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 45
·期 45
·21066-21073
·
IF 3.591
Meng Kuang,Junhao Li,Jinjun Zhang,Jianhong Ding,Ziwang Zhang,Kangrong Huang,Nan Yang,Ziheng Zhang,Mingming Yang,Haiyong Ni
The radius of trivalent scandium ions is much smaller than those of other rare earth ions and thus research studies targeting the substitution of the scandium site with other light-emitting rare earth ions are rarely reported. In our present work, special attention is paid to the effect of Dy3+ doping on the crystal structure, atomic site occupancy and luminescence properties of the ScCaBO4 host as Dy3+ often serves as an individual activator for single-phase white light-emitting phosphors. Herein a series of ScCaBO4:Dy3+ phosphors were prepared by solid-state reactions. The phase composition was recorded by X-ray diffraction analysis and XRD refinement reveals that a pure phase could be maintained even when the Dy3+ concentration reaches 11%. Scanning electron microscopy (SEM) was utilized to observe the morphology and EDS mapping was used to investigate elemental distribution. The luminescence performances of the phosphors were investigated using UV-vis diffuse reflectance spectra, steady-state excitation and emission spectra and also transient luminescence decays. Dy3+ luminescence can be ascribed to its 4F9/2 → 6H15/2, 6H13/2 and 6H11/2 transitions, producing blue, yellow and red emissions. The Dy3+ concentration was further optimized at 3%, at which the CIE coordinates and fluorescence lifetimes were (0.425, 0.413) and 0.546 ms, respectively. Thermal quenching studies of the ScCaBO4:0.03Dy3+ phosphor show that Dy3+ luminescence at 400 K can maintain 60.91% of its initial value measured at room temperature. All the results indicate that the ScCaBO4:Dy3+ inorganic phosphors could be a promising single component phosphor for near-UV chip based WLEDs.
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
·
2025
·
IF 3.6
Kuo Shen,Yahong Jin,Yanmei Li,Yihua Hu
Inorganic scintillator materials have garnered widespread attention due to their applications in high-energy X-ray detection and imaging. However, developing materials that possess both high thermal stability and the capability to provide high-resolution X-ray imaging remains a significant challenge in this field. This article reports the synthesis of Ba 1.31 Ca 0.69 SiO 4 inorganic scintillator materials doped with Eu 2+ and Dy 3+ through a high-temperature solid-phase method. Their structure, photoluminescent properties under visible light and X-ray excitation, and thermoluminescence characteristics were thoroughly characterized. Experimental results indicate that the material's traps were enriched through the aliovalent substitution of Dy 3+ , enhancing the afterglow at room temperature. Under 350 nm excitation, the material demonstrated excellent thermal stability (maintaining 90% of its intensity at 150 °C compared to 30 °C) and a high quantum efficiency (IQE = 96.64 %). Furthermore, under X-ray excitation, the material exhibits a high electron storage capacity, which can be read out under near-infrared light at 870 nm, and can be rapidly erased under heating conditions or under visible light at 470 nm. Finally, we prepared flexible films using the phosphor, demonstrating a spatial resolution of 11.9 lp/mm −1 under X-rays, as well as showcasing the real-time and delayed imaging capabilities of the flexible film under X-ray exposure.
研究领域:
材料科学
·
光学
·
医学影像
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2024
·
IF 5.3
Xinjing Xie,Yangyang Tuo,Siyu Cheng,Di Gao,Mengkun Zhang,Xiang Liu,Huajuan Deng,Ruijin Yu
The novel Dy 3+ -doped NaMgLaTeO 6 (NaMgLaTeO 6 :Dy 3+ ) phosphors were produced through a high-temperature solid-state reaction. X-ray diffraction (XRD) analysis and Rietveld refinement manifest that the pure phosphor was committed to the space group (P2 1/m (11)) and features the double perovskite structure. The band gap ( E g ) of the direct semiconductor NaMgLaTeO 6 is calculated to be 2.065 eV. Under 388 nm excitation, the 4 F 9/2 → 6 H 13/2 energy level transition contributes to the maximum emission peak at 572 nm. Other properties of the phosphor include optimal concentration ( x = 5 mol %), high thermal stability, activation energy ( E a = 0.31 eV), and internal quantum efficiency (IQE = 31.44 %). The relevant color coordinate of the white light emitting diode (w-LED) prepared by the phosphor is (0.298, 0.311). The features of the latent fingerprint (LFP) created by NaMgLaTeO 6 :Dy 3+ can be clearly reflected on different surfaces. In summary, NaMgLaTeO 6 :Dy 3+ phosphor has proven high potential in w-LEDs production and LFP detection.
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 RARE EARTHS
·
2022
·
IF 4.632
Mingze Zhang,Lin Lin,Zhuohong Feng,Zhezhe Wang,Yuanming Yang,Wenjun Ma,Jieyi Cai,Pan Lu,Siyi Jia,Zhiqiang Zheng
In this work, catena-[(μ-benzene-1,3,5-tricarboxylato)-(1,10-phenanthroline)-( N , N -dimethylformamide)-gadolinium(iii)- N,N -dimethylformamide solvate] (denoted as Gd-MOF) co-doped with Eu 3+ and Dy 3+ was successfully synthesized. The entire X-ray diffraction peaks of the sample match well with the Gd-MOF phase. A detailed characterization by inductively coupled plasma mass spectrometry (ICP-MS) shows that the actual concentration is basically consistent with the design concentration. The temperature sensing properties of Gd-MOF:Eu 3+ ,Dy 3+ were analyzed by temperature-dependent fluorescence spectra from 213 to 453 K. As temperature rises, the emission color of Gd-MOF:Eu 3+ ,Dy 3+ changes from yellow to red. The relative sensitivity reaches a maximum of 5.87%/K at 383 K in the Gd-MOF:1%Eu 3+ ,30%Dy 3+ sample. The high relative sensitivity of this MOF is due to the phonon-assisted energy transfer from Dy 3+ to Eu 3+ , which is proved via fluorescence decay curves and fluorescence spectra. The major route of this energy transfer is 4 F 9/2 (Dy 3+ ) → 5 D 1 (Eu 3+ ).
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2025
·
IF 2.6
Shanshan Cong,Hongquan Yu,Zhichao Ren,Jiashi sun,Xiangping Li,Sai Xu,Baojiu Chen
White LEDs are environmentally friendly light sources that have received extensive attention. The combination of an ultraviolet chip and three-color phosphors is the main method used to obtain white LED devices. The primary issues include the decrease in luminescent intensity and lifetime, the reduction in output power of the LED device, and the color shift of the phosphor in high-temperature environments caused by high operating currents and prolonged working times. In this work, bright single-phase full-spectrum white Tm3+ and Dy3+ Y2Zr2O7 (YZO) nanotubes with high thermal stability and ultralow color drift were prepared by electrospinning technique at 1300 °C. The color coordinates (0.3308, 0.332) of YZO: 2%Tm3+/2%Dy3+ nanotubes are very close to standard white light (0.33, 0.33). The luminescent properties of YZO:Tm3+/Dy3+ nanotubes were investigated and compared with those of YZO:Tm3+/Dy3+ powders prepared via a solid-state reaction at 1300 °C. At high temperatures, YZO:Tm3+/Dy3+ nanotubes exhibit better thermal quenching resistance than YZO:Tm3+/Dy3+ powders do because of their unique tubular structure. YZO:2%Tm/1%Dy nanotubes maintain 91.23% of their initial emission intensity at 453 K compared to 303 K, whereas the emission intensity of YZO:2%Tm/1%Dy powders remains at 90.42% at 453 K compared to that at room temperature. YZO: 2%Tm/1%Dy nanotubes have an ultralow color drift of 0.16% at 453 K, whereas that of YZO: 2%Tm/1%Dy powders reaches 0.9% at the same temperature.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2022
·
IF 4.171
Haitao Lv,Yanmin Wang,Zhidong Pan
(Eu 2+ , Dy 3+ )-co-doped strontium/calcium aluminate phosphor as one of color-tunable emission materials was synthesized via solid-state reactions at 1300 °C for 3 h. Effect of strontium/calcium ratio on the crystal structure, particle size/morphology as well as photo- and mechano-luminescent properties of the phosphors was investigated by X-ray diffraction, Rietveld method, scanning electron microscopy with energy dispersive X-ray spectroscopy, and spectrophotometry . The mechano-luminescent properties were measured by two mechanical stress instruments (i.e., impact and compression), respectively. The results reveal that a mixed phase with SrAl 2 O 4 and CaAl 2 O 4 has a monoclinic structure with a space group P2 1 for Sr x Ca 1-x Al 2 O 4 : 0.001Eu 2+ , 0.001Dy 3+ phosphor (x = 0.2–0.8), resulting in the change of crystallographic parameters due to different calcium/strontium ratios. According to the results of photo- and mechano-luminescent characterizations, SrAl 2 O 4 : 0.001Eu 2+ , 0.001Dy 3+ phosphor (x = 1.0) has a superior mechano-luminescent property rather than CaAl 2 O 4 : 0.001Eu 2+ , 0.001Dy 3+ phosphor (x = 0), although they both have photo-luminescent properties. Furthermore, the CEI diagram indicates that the emission color of the phosphor can be tuned from blue to bluish white and eventually to green, and the mechano-luminescent peak appears and becomes intense as Sr 2+ ions substitute for Ca 2+ ions in the phosphor gradually. In addition, the photo- and mechano-luminescent mechanisms of phosphor were also discussed.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
OPTICS AND LASER TECHNOLOGY
·
2022
·
IF 4.939
Jiang Guo,Sichun Li,Jiayun Kong,Yuxin Li,Li Zhou,Liyang Lou,Qiuyi Lv,Rong Tang,Lingling Zheng,Bin Deng,Ruijin Yu
A new yellow-emitting phosphor, NaCaTiTaO 6 :Dy 3+ , was synthesized via solid-phase synthesis at 1300 ℃. X-ray diffraction (XRD) analysis and Rietveld refinement showed that the prepared phosphors exhibited a stable double perovskite structure. The particle size of the phosphor was around 3.8 μm. The maximum emission peak at 574 nm is attributed to the 4 F 9/2 → 6 H 13/2 energy level transition under irradiation at 389 nm. The optimum Dy 3+ doping concentration is 0.10 M equivalent, and concentration quenching is due to the nearest neighbor ion interaction. The luminescence intensity of the phosphor was reduced by only 15% at 420 K, exhibiting high thermal stability. Quantum yield (QY) was measured to be 26.31%. Finally, the Commission International de I’Eclairage (CIE) color coordinate of the phosphor for white light emitting diode (w-LED) was (0.314, 0.323), with a color rendering index ( R a ) of 92 and a correlated color temperature (CCT) of 5578 K. Above all, the Dy 3+ -doped double perovskite NaCaTiTaO 6 :Dy 3+ phosphor is expected to be used in w-LEDs.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Applied Sciences-Basel
·
2024
·Vol. 14
·期 9
·3929
·
IF 2.5
Rungang Liu,Xueting Liu,Weikai Lin,Yingliang Liu
Preparing submicron and nanoscale phosphors with good optical properties for practical applications is a challenging task for current inorganic long afterglow luminescent materials. This study utilized commercialized SrAl2O4:Eu2+, Dy3+phosphors (SAOED) as raw materials and employed solvents with lower polarity or non-polar solvents for dynamic solvothermal treatment. The commercialized phosphor’s overall average particle size was reduced from 42.3 μm to 23.6 μm while maintaining the fluorescence intensity at 91.39% of the original sample. Additionally, the study demonstrated the applicability of the dynamic solvothermal method to most other commercialized inorganic phosphors. The experiment produced a high-brightness nano-sized phosphor with a yield of 5.64%. The average diameter of the phosphor was 85 nm, with an average thickness of 16 nm. The quantum efficiency of the phosphor was 74.46% of the original sample. The fingerprint imaging results suggest that the nano-sized phosphors have potential for practical applications.
研究领域:
材料科学
·
光学
·
纳米技术
✓ 已验证
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2019
·
IF 2.961
Haitao Lv,Zhidong Pan,Yanmin Wang
(Eu 2+ , Dy 3+ )-co-doped strontium aluminate (SrAl 2 O 4 :Eu 2+ , Dy 3+ ) powder as a mechanoluminescent (ML) phosphor was synthesized via soft mechanochemical pretreatment of precursor mixtures in a stirred media mill and subsequent calcination . Effect of soft mechanochemical pretreatment of precursors on the synthesis process as well as the photoluminescent (PL) and ML properties of SrAl 2 O 4 :Eu 2+ , Dy 3+ phosphor was investigated. The precursor mixtures unground and ground at different time and the resultant phosphors were characterized by laser particle size analysis , X-ray diffraction, scanning electron microscopy, differential scanning calorimetry , Fourier transform infrared spectroscopy and optical property measurement. The results reveal that soft mechanochemical pretreatment of precursor mixture promotes the crystal growth, and reduces the subsequent calcination temperature. SrAl 2 O 4 :Eu 2+ , Dy 3+ phosphor can be obtained via calcining at 1200 °C for precursor mixture ground at 60 min, but formed via calcining at 1400 °C for unground precursor mixture. The phosphor synthesized with precursor mixture ground at 60 min has the maximum PL and ML intensities due to the enhancement of Eu 2+ and Dy 3+ ions into the crystal lattice to form more electron traps . The measurements by a designed ML instrument indicate that the ML intensity increases with increasing impact stress, and decreases with multiple applications of the same impact stress on phosphor disks.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Optical Materials Express
·
2018
·Vol. 8
·期 8
·2089-2102
·
IF 2.566
Jian Cui,Xusheng Xiao,Yantao Xu,Xiaoxia Cui,Meiling Chen,Junjiang Guo,Min Lu,Bo Peng,Haitao Guo
For developing an ideal efficient and low-threshold medium for fiber lasers operated at 4 μm wavebands, 0.05 wt.% to 0.5 wt.% Dy3+ ions doped Ga0.8As39.2S60 chalcogenide glasses were investigated and a 4.2 μm fiber laser was theoretically studied based on the rate and propagation equations. It was shown that the Ga0.8As39.2S60 glass shows a desirable large Dy3+ ion solubility, which has been increased by an order of magnitude compared to As2S3 glass. Dy-rich nanocrystallines were found when the Dy3+ ions’ concentration is more than 0.3wt.% (i.e. 3000 ppmw), and the concentration quenching was found based on spectral analysis; however, no rapid decreases in lifetimes were observed. 0.3wt.% Dy3+ doped Ga0.8As39.2S60 glass possesses relatively large laser quality factor σemi × τmea = 1.70 × 10−23 cm2·s and excellent thermal stability (ΔT = 182°C), which can be successfully drawn into fibers indicating good potential for mid-infrared fiber laser.
研究领域:
材料科学
·
光学工程
·
物理学
✓ 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）