MATERIALS RESEARCH BULLETIN
·
2024
·
IF 5.3
Wenkai Zhang,Chaoyong Deng,Min Zhang
Dy 3 + doped Gd 2 MgTiO 6 (GMT) phosphors were were fabricated using the high temperature solid state method in this study. Fluorescence, UV-visible spectrometer, X-ray photoelectron spectrometer, and Transient fluorescence spectrometer. The results show that the structures of the series of phosphors belong to the monoclinic crystal system, and Dy 3 + was successfully incorporated into the GMT host without affecting its structure. The samples emitted extremely strong blue and yellow light, which are the transitions derived from 4 H 9 / 2 to 6 H 15 / 2 (482 nm) and 6 H 13 / 2 (575 nm) levels, respectively. The sample shows obvious effects of concentration, GMT: 0.11Dy 3 + phosphor has the best photoluminescence (PL) intensity 7.148 × 10 5 , lifetime is 0.16 ms, and an internal quantum efficiency (IQE) is 2.1 % . The Dy 3 + doped sample has a larger energy band gap of 4.11 eV. The prepared samples exhibit color coordinates in proximity to that of standard white light, which indicates that the phosphor GMT: Dy 3 + can be applied to white light phosphors and light-emitting diode (LED) devices.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
PHYSICA B-CONDENSED MATTER
·
2022
·
IF 2.988
Xianzhi Zeng,Haoyi Wu,Junhao Peng,Chuanlong Wang,Guangting Xiong,Yahong Jin,Yihua Hu
The improvement of luminescent properties is important for expanding the application of long afterglow phosphor (LAP). Here, the melilite-type Sr 1·97 MgSi 2 O 7 : Eu 2+ 0.01 , Dy 3+ 0.02 LAP was studied with Bi 3+ as the second co-dopant. Both photoluminescence (PL) and thermoluminescence (TL) were improved in terms of intensity and afterglow lifetime when the doping concentration of Bi 3+ exceeded 2.5 mol%, and the optimized point was 3.5 mol%. As compared to the case of Eu 2+ - Dy 3+ double doping, the improved PL of Eu 2+ - Dy 3+ - Bi 3+ triple doping samples was attributed to better photon absorption . The improved TL and afterglow were attributed to the synergistic strengthening density of the traps by Bi 3+ and the deepening of trapping by Dy 3+ , if their distance was sufficient close. As a result, both TL and afterglow optimized at a concentration of 2 mol% Dy 3+ - 3.5 mol% Bi 3+ coupling.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
PHYSICS LETTERS A
·
2019
·
IF 2.087
Renping Cao,Longxiang Xu,Yaqin Ran,Xinyan Lv,Siling Guo,Hui Ao,Ting Chen,Zhiyang Luo
Ba 2 LaSbO 6 :Mn 4+ , Ba 2 LaSbO 6 :Mn 4+ , Dy 3+ , and Ba 2 LaSbO 6 :Mn 4+ , H 3 BO 3 phosphors are synthesized in the air by high temperature solid state reaction method. The particle sizes and sintering degree of Ba 2 LaSbO 6 :Mn 4+ phosphor may be changed by doping Dy 3+ ion and H 3 BO 3 . When the small amount of Dy 3+ ion and H 3 BO 3 are codoped, the emission intensity of Ba 2 LaSbO 6 :Mn 4+ phosphor can be enhanced 1.2–1.3 times and the quantum efficiency of Ba 2 LaSbO 6 :Mn 4+ phosphor can be improved. The lifetime of Ba 2 LaSbO 6 :Mn 4+ phosphor may be changed by doping Dy 3+ ion and H 3 BO 3 . The experimental results are valuable in research of luminescence property of Mn 4+ -doped luminescence 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 LUMINESCENCE
·
2025
·
IF 3.6
Yutian Zhang,Lianjie Li,Junyu Chen,Hai Guo
Fluorescent thermometers based on lanthanide-doped phosphors have broad application prospect because of their quickly response, highly sensitivity, non-contact mode and widely application scenarios. However, their relative sensitivity is limited by fixed thermal coupling energy level. Herein, Ca 2 GdNbO 6 :Dy 3+ ,Eu 3+ samples possessing dual-emission centers were fabricated as fluorescence thermometers based non-thermal coupling energy level. When excited by 393.5 nm, the characteristic emissions from Dy 3+ and Eu 3+ in CGNO:Dy 3+ ,Eu 3+ can be simultaneously detected. Furthermore, CGNO:Dy 3+ ,Eu 3+ phosphors exhibit excellent temperature sensing performance in fluorescence intensity (FI) relied on Eu 3+ and fluorescence intensity ratio (FIR) relied on dual-emission centers. The maximum relative sensitivities ( S Rmax ) reach 1.61 %K −1 at 426 K for FI at 703 nm, 1.01 %K −1 at 391 K for FIR of FI at 616 nm and FI at 576 nm, and 2.18 %K −1 at 501 K for FIR of FI at 703 nm and FI at 576 nm, respectively. These findings demonstrate that Ca 2 GdNbO 6 :Dy 3+ ,Eu 3+ samples are prime candidates for fluorescent thermometers.
研究领域:
材料科学
·
光学传感
·
固体物理
·
无机化学
✓ 已验证
产品关联
DOI
高影响因子
OPTIK
·
2023
·
IF 3.1
Shan Liu,Mingxia Lv,Jun Zhou,Yaohui Zhu,Rong Hu,Xiong Li,Denghui Xu
A series of CaLa 1- x LiTeO 6 : x Dy 3+ phosphors were synthesized via a conventional solid-state reaction method, and the effects of different Dy 3+ doping concentrations on the luminescence properties of the phosphors were studied. The excitation spectrum indicated that these synthesized phosphors had strong absorption bands in near-ultraviolet (n-UV) region in the range from 300 to 500 nm. There were two sharp emission peaks in the visible region, which were located at 483 nm, 574 nm, corresponding to transitions of 4 F 9/2 → 6 H 15/2 (magnetic dipole transition) and 4 F 9/2 → 6 H 13/2 (electric dipole transition), respectively. The phosphor CaLa 0.95 LiTeO 6 :0.05Dy 3+ shows superior thermal stability. When the temperature rises to 425 K, the luminous intensity remains at 79% compared with the initial intensity of 300 K. These results demonstrate that the CaLa 1- x LiTeO 6 : x Dy 3+ phosphors have great potential as a single-phase luminescence material for near-ultraviolet (n-UV) excitation.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2021
·Vol. 51
·期 1
·331-338
·
IF 1.938
Yun Xiangyan,Zhou Jun,Jia Yetong,Liu Shan,Zhu Yaohui,Li Xiong,Xu Denghui
White-emitting SrSc 1- x LiTeO 6 : x Dy 3+ phosphors were conveniently synthesized by a conventional high-temperature solid-state synthesis process. The crystal structure, photoluminescence spectrum characteristics, fluorescence quenching phenomenon, fluorescence lifetime analysis and the thermal stability of SrSc 1- x LiTeO 6 : x Dy 3+ phosphors were comprehensively illustrated. The E gap of the SrScLiTeO 6 host was approximately 4.65 eV based on diffuse reflectance spectroscopy (DRS) analysis. Moreover, the SrSc 0.94 LiTeO 6 :0.06Dy 3+ phosphor exhibits two principal emission bands: the narrow-band emission at 481 nm ( 4 F 9/2 → 6 H 15/2 , magnetic dipole transition, blue light area) and 573 nm ( 4 F 9/2 → 6 H 13/2 , electric dipole transition, yellow light area) under the excitation of 366 nm ultraviolet light, respectively. The values of τ are determined to be 0.558, 0.380, 0.307 and 0.254 ms for SrSc 1- x LiTeO 6 : x Dy 3+ ( x = 0.005, 0.01, 0.04, 0.08) samples, respectively. The value of Δ E for SrSc 0.94 LiTeO 6 :0.06Dy 3+ phosphor is deduced to be 0.1969 eV, which indicates excellent thermal stability. In addition, the CIE coordinates are located in the white light-emitting area. The abovementioned results show that the SrSc 1- x LiTeO 6 : x Dy 3+ can serve as a phosphor with potential application value for outdoor illumination.
研究领域:
材料科学
·
光学
·
固体物理
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Yanzhi Zhang,Xiaoxu Deng,Ruirui Cui,Xiang Guo,Jun Zhang,Chaoyong Deng
In order to obtain efficient single-phase co-doped phosphors with excellent luminescence properties under near-ultraviolet excitation, Ca 3 Gd 2 Si 3 O 12 : x Dy 3+ (CGSO: x Dy 3+ ) and Ca 3 Gd 2 Si 3 O 12 :0.08Dy 3+ , y Sm 3+ (CGSO:0.08Dy 3+ , y Sm 3+ ) phosphors were effectively manufactured using the classical high-temperature solid-phase method. The phase structure, morphology and XPS test results of the phosphor all show that the Ca 3 Gd 2 Si 3 O 12 (CGSO) material has been successfully synthesized, and Dy 3+ and Sm 3+ ions have been successfully doped into the matrix lattice. Under 362 nm illumination, the PL spectra of CGSO:0.08Dy 3+ , y Sm 3+ phosphor revealed that the typical peak intensity of Dy 3+ ions declined as the amount of Sm 3+ ions increased, whereas the distinctive peak intensity of Sm 3+ ions achieved its maximum at y = 0.07. As Sm 3+ doping grows larger, the fluorescence lifetime shortens, signifying the occurrence of transferring energy among Dy 3+ and Sm 3+ ions, with a maximum efficiency of 81 % being attained. The Ca 3 Gd 2 Si 3 O 12 :0.08Dy 3+ , y Sm 3+ phosphor demonstrates a commendable thermal stability of 90.17 %, with adjustments to the Sm 3+ concentration revealing the potential to yield warm white light, as evidenced by both CIE chromaticity coordinates and CCT measurements. In addition, compared with the phosphor containing only Dy 3+ , the LED assembled with CGSO:0.08Dy 3+ , y Sm 3+ phosphor containing Sm 3+ ions and 365 nm LED chip emits warmer white light with lower color temperature, which confirms the application value of CGSO:0.08Dy 3+ , y Sm 3+ phosphor in the domain of solid-state lighting.
研究领域:
材料科学
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光学
·
固体照明
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF FLUORESCENCE
·
2025
·
IF 3.1
Chen Dongxun,Lv Xulong,Liang Yanjie
In this work, Dy 3+ -doped Bi 2 SiO 5 nanoparticles with uniform spherical morphology and narrow size distribution have been successfully synthesized using a facile template-assisted approach. The effects of sintering temperature and Dy 3+ doping concentration on the phase composition, morphology, and luminescence properties of Bi 2 SiO 5 :Dy 3+ nanophosphor are systematically investigated through X-ray diffraction, scanning electron microscopy, and photoluminescence (PL) spectroscopy. X-ray diffraction results confirm that the synthesized Bi 2 SiO 5 :Dy 3+ nanospheres exhibit a pure tetragonal phase. Meanwhile, the phosphor particles are composed of monodisperse nanospheres with an average diameter of approximately 265 nm. Upon excitation at 388 nm, intense photoluminescence is noted in the blue ( 4 F 9/2 → 6 H 15/2 ) and yellow ( 4 F 9/2 → 6 H 13/2 ) spectral regions due to the characteristic emissions of Dy 3+ ions. Temperature-dependent PL spectra reveal that the optimized Bi 2 SiO 5 :2.5%Dy 3+ nanospheres maintain extraordinary luminescence thermal stability, retaining 81.0% of its emission intensity at 423 K compared to 303 K. The phosphor also showed remarkable color stability, with CIE chromaticity coordinates shifting minimally from (0.377, 0.413) at 303 K to (0.373, 0.407) at 423 K. This newly developed Bi 2 SiO 5 :Dy 3+ nanospheres exhibit commendable PL properties, enabling them as promising candidates for yellow phosphors in LEDs and display applications.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF RARE EARTHS
·
2023
·
IF 4.9
Jian Hu,Ruirui Cui,Jun Zhang,Hupeng Ling,Youzhen Shi,Xiang Guo
The work focuses on the utilization of the conventional solid-state sintering procedure to synthesize white phosphors Ca 2 InTaO 6 : x Dy 3+ (0.02 ≤ x ≤ 0.12). Utilizing X-ray diffraction, the phase structure of samples was examined, and the crystal structure was refined using the Rietveld method. A scanning electron microscope was used to analyze the microstructure of sample. First-principles calculations confirm that the indirect bandgap of Ca 2 InTaO 6 is 3.786 eV. The luminous properties and energy transfer mechanism of Ca 2 InTaO 6 : x Dy 3+ were studied using photoluminescence spectroscopy. The 4 F 9/2 → 6 H 13/2 transition of Dy 3+ ions is responsible for the greatest emission peak, which was measured at 575 nm. According to research, the lifespan falls as the concentration of Dy 3+ doping amount rises because of frequent interaction and energy transfer between Dy 3+ ions. The correlated color temperature of the W-LEDs packaged with Ca 2 InTaO 6 :0.08Dy 3+ is 4677 K and CIE 1931 chromaticity coordinates are (0.3578, 0.3831). Meantime, the phosphor also shows outstanding temperature stability property, which maintains 83.8% of its initial emission intensity at 450 K (activation energy of 0.1467 eV). The W-LEDs retain their performance for 100 min when powered at 3.4 V voltage and 600 mA current, demonstrating the packed W-LEDs' sustained operation at high temperatures.
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 NANOSCIENCE AND NANOTECHNOLOGY
·
2012
·Vol. 12
·期 1
·151-158
·
IF 1.563
Liu Chenglu,Wang Fang,Jia Peiyun,Lin Jun,Zhou Zhiqiang
Eu3+ and Dy3+-doped YVO4 nanocrystallites were successfully prepared at 400 °C in equal moles of NaNO3 and KNO3 molten salts. X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy, transmission electronic
microscopy (TEM), photoluminescence (PL) spectrum and lifetime were used to characterize the nanocrystallites. XRD results demonstrate that NaOH concentration and annealing temperature play important roles in phase purity and crystallinity of the nanocrystallites, the optimum NaOH concentration
and annealing temperature being 6:40 and 400 °C respectively. TEM micrographs show the nanocrystallites are well crystallized with a cubic morphology in an average grain size of about 18 nm. Upon excitation of the vanadate group at 314 nm, YVO4:Eu3+ and YVO4:Dy3+
nanocrystallites exhibit the characteristic emission of Eu3+ and Dy3+, which indicates that there is an energy transfer from the vanadate group to the rare earth ions. Moreover, the structure and luminescent properties of the nanocrystallites were compared with their
bulk counter-parts with same composition in detail.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Herui Zhao,Yanjie Zhang,Shiwei Yang,Chunwen Ye,Cong He,Yaqi Song,Yuxin Wang,Bojun Lin,Jingjie Yu
Dy 3+ and Eu 3+ co-doped phosphors have been emerged as potential candidate to generate high-quality white light under the ultraviolet (UV) or near ultraviolet (NUV) excitation for health and comfort lighting. Herein, K 2 Lu(WO 4 )(PO 4 ) crystal has been newly developed to accommodate rare earth ions, such as Dy 3+ and Eu 3+ ions, to achieve spectral tunability of high-quality white light. Under NUV excitation, Dy 3+ singly-doped K 2 Lu(WO 4 )(PO 4 ) phosphors exhibit the desired blue emission at 486 nm and yellow emission at 575 nm, attributed to the electric dipole transition 4 F 9/2 → 6 H 15/2 and the magnetic dipole transition 4 F 9/2 → 6 H 13/2 transitions of Dy 3+ ions, respectively. Interestingly, the emission color can be facilely adjusted from cold white light to pink light under 365 nm NUV excitation due to the co-doping of Eu 3+ ions in K 2 Lu(WO 4 )(PO 4 ): 0.05Dy 3+ sample. Further, the remote luminescent layers containing K 2 Lu(WO 4 )(PO 4 ): 0.05Dy 3+ , 0.20Eu 3+ phosphor can be printed on glass substrate by screen printing technique to generate high-quality white light with the correlated color temperature (CCT) of 5433 K and color rendering index (CRI) of 87. Moreover, the remote luminescent layers exhibit better heat dissipation performance compared to conventional encapsulated LEDs and can be used as a multicolor emitting candidate for high-power white LEDs.
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 THE AMERICAN CERAMIC SOCIETY
·
2023
·Vol. 106
·期 6
·3654-3662
·
IF 3.9
Kailei Lu,Wenhan Han,Gang Cheng,Xinghua Zhu,Shirui Li,Hao Guo,Bosen Gu,Yucheng Ye,Jianqi Qi,Tiecheng Lu
Attaining effective warm white light emitting in functionally advantageous transparent polycrystalline ceramics is vitally important to guarantee the development of both human and botanical systems. In response to this aim, a series of Dy 3+ -doped Y 2 Zr 2 O 7 (YZO) transparent ceramics were prepared via a solid-state reaction and vacuum sintering approach in this work. These fabricated ceramics show high transparency, where the in-line transmittance at 700 nm is about 76%, which is very close to the theoretical limit (78%). In addition, under the excitation of UV light sources (358 and 384 nm), strong warm white light emissions were observed in these YZO:Dy transparent ceramics. The corresponding photoluminescence characteristics and mechanisms of YZO:Dy ceramics are investigated carefully. The Dy-doped YZO ceramics integrate with high transparency and UV-excitable warm white light emission properties, making them promising light-emitting converter materials for light-emitting source applications.
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
危险品化学品经营许可证（带存储）