ACS Applied Nano Materials
·
2023
·
IF 5.9
Ou Hai,Jian Li,Mengkang Pei,Qiang Ren,Xiulan Wu,Bin Qin,Xinnan Xiao,Xiaoli He,Tong Li,Yang Chen
Advanced fluorescence anti-counterfeiting technology has attracted the attention of researchers and encourages people to develop more materials with more colors and functions. Here, in order to achieve a full-band afterglow in the visible light region, we designed a composite CsPbI3-CsPbBr3/Sr2MgSi2O7:Eu2+,Dy3+@SiO2, which is composed of nanoscale all-inorganic cesium lead perovskite quantum dots (PQDs) and long-afterglow luminescent materials Sr2MgSi2O7:Eu2+,Dy3+ (SMS). SMS is used to store light energy, and PQDs are used to control afterglow emission colors; through their energy transfer, the afterglow colors can be adjusted in the visible region. SiO2 is used as the coating material to improve the temporary stability of the nanocomposite. The composite mixed with oleic acid (OA) can be used as a dye, which exhibits different emitting colors and afterglow colors under different excitation environments. This research provided an idea for using long-afterglow luminescent materials and PQDs in the field of fluorescence anti-counterfeiting by double anti-counterfeiting of fluorescence and afterglow.
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
INORGANIC CHEMISTRY
·
2021
·
IF 5.165
Yijia Liu,Gengxin Zhang,Junben Huang,Xiaoma Tao,Guihua Li,Gemei Cai
Single-phase white-emission phosphors possess a judicious usage potential in phosphor-converted white-light-emitting diodes (WLEDs). Recently, numerous efforts have been made toward the development of new patterns of white-emitting phosphors that achieve excellent quantum yield, superior thermal stability, and applaudable cost effectiveness of WLEDs. Finding suitable single-component white phosphor hosts to provide an ideal local environment for activators remains urgent. Inspired by the original discovery of the promising host MgIn2(P2O7)2 (MIP) and its structural dependence on alkali-metal cations, we synthesized a brand-new phosphor host, SrIn2(P2O7)2 (SIP), via the traditional solid-state reaction. Its crystal structure was determined using an ab initio analysis and the Rietveld method. It belongs to a monoclinic unit cell with the space group C2/c. Besides, SIP exhibits a special layered three-dimensional framework in which the monolayer [SrO10]∞ was surrounded by a bilayer [In2P4O14]∞ made of the InO6 octahedra and P2O7 groups. A series of pure SIP:Tm3+,Dy3+ phosphors with tunable blue–white–yellow emission were prepared by adjusting the dopant concentration and utilizing the Tm3+–Dy3+ energy transfer. The daylight-white-emitting phosphor SIP:0.01Tm3+,0.04Dy3+ (the correlated color temperature is 4448 K) exhibits an abnormal thermal antiquenching property, and the emission intensity of 423 K reaches 103.7% of the initial value at 300 K. On the basis of the temperature-dependent lattice evolution and microenvironment analysis, the reduction of β and lattice distortion can lead to lower asymmetry of the activators and benefit the compensation of trapped-electron thermal activation. In this work, an integration study was carried out on the crystal structure of the new matrix, the occupation of the luminescent center, the interaction of different activators in the host, and the distortion degree of the local structure for the activators, which is of great practical sense for producing a novel single-matrix white phosphor possessing superior thermal endurance for UV-light-stimulated WLEDs.
研究领域:
材料科学
·
光学
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DOI
PubMed
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2019
·Vol. 103
·期 4
·2432-2442
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IF 3.094
Xusheng Xiao,Yantao Xu,Jian Cui,Xiaogang Liu,Xiaoxia Cui,Xunsi Wang,Shixun Dai,Haitao Guo
By conventional melt-quenching techniques, a series of Dy 3+ -doped (0.1 to 1.0 wt%) Ga 5 Ge 20 Sb 15 S 60 bulk glasses were fabricated and their potential for developing mid-infrared fiber laser beyond 4 μm were evaluated, in which the optimal Dy 3+ doping concentration was found to be 0.3 wt% and the largest laser quality factor value ( σ e × τ mea = 2.62 × 10 −23 cm 2 s) among all of the Dy 3+ -doped chalcogenide glass was obtained. On this basis, through using the chemical purification methods with chlorine gas combined with the dynamic distillation process, the high-purity GGSS glasses with low O–H and S–H absorptions were successfully fabricated, which was confirmed by the optimized mid-infrared linear transmittance and improved fluorescent lifetimes of Dy 3+ : 6 H 13/2 , 6 H 11/2 levels. Furthermore, for the first time to the best of our knowledge, the Dy 3+ -doped, single-mode, and double-cladding chalcogenide fibers with the core/cladding ratios of 125:60:11 and 125:66:11.5 were achieved by a multistage rod-in-tube fiber drawing process and extrusion methods, respectively. The GeS 2 -based fiber exhibits excellent transmission performance at 1.0-5.0 μm: 3.0 dB/m at 2.9 μm (O–H), 2.4 dB/m at 4.1 μm (S–H). Combining the advantages of high-purity, high doping concentration and single-mode double-cladding structure, the optimized active fiber should be an ideal efficient and low-threshold medium toward mid-infrared fiber laser beyond 4 μm.
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DOI
高影响因子
OPTICAL MATERIALS
·
2023
·
IF 3.9
Hui Li,Ziyao Wang
Ba 3 Lu 4 O 9 :Dy 3+ ,Eu 3+ phosphors were developed through the conventional solid-state reaction. Luminescent performance including the energy transfer from dysprosium to europium , spectral tunability, fluorescent lifetime and thermal quenching behavior of the as-studied phosphors was studied. The characteristic emission of Dy 3+ and Eu 3+ were detected in Ba 3 Lu 4 O 9 :Dy 3+ ,Eu 3+ upon the excitation at various ultraviolet–visible wavelengths. The critical distance between dysprosium and europium ions was evaluated to be about 16.05 Å. The energy transfer from dysprosium to europium in Ba 3 Lu 4 O 9 can be attributed to the dipole-quadruple mechanism, and the efficiency was evaluated to be 81.8% for Ba 3 Lu 3.52 O 9 :0.16Dy 3+ ,0.32Eu 3+ . The tunable warm-white emission and high thermal stability reveal that the as-studied phosphor can be an auspicious alternative for white LEDs application.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Ying Li,He Li,Guangjun Yang,Xiwei Qi
A series of La 2 O 3 -Ga 2 O 3 -0.08Eu 2 O 3 - x Dy 2 O 3 amorphous samples ( x = 0–0.14, interval of 0.01) were synthesized via containerless solidification. XRD results demonstrated that the prepared materials possessed an amorphous structure with a broad diffraction hump instead of sharp crystalline peaks. Differential thermal analysis (DTA) revealed that Dy 2 O 3 doping barely altered the glass transition temperature ( T g ) but significantly increased thermal stability and crystallization characteristic temperature ( T x ) and thermal stability parameter Δ T ( T x - T g ), with the maximum Δ T reaching ∼96 °C at x = 0.09. Concentration quenching of Dy 3+ was dominated by multipolar interaction, confirmed by a critical distance ( R c ) of 18.98 Å and Dexter theory analysis. The optical band gap ( E opt ) remained ∼3.72 eV at x ≤ 0.06 and decreased to ∼3.42 eV at x = 0.11. CIE standard 1931 chromaticity coordinate values together with correlated color temperature (CCT) were tunable, with emission color evolving from warm reddish-orange to orange-yellow (CCT: 2250–3240 K). The excellent thermal stability, tunable PL, and tunable CCT render these amorphous materials promising candidates for solid-state luminescent devices.
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DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2026
·
IF 4.7
Xiangyan Yun,Haizhe Zhong,Xueping Zang,Mingjun Chen,Qingqing Cheng,Wei Tao,Heng Li,Zaifa Yang
Developing down-conversion phosphors with stable luminescence and high temperature sensitivity is essential for non-contact optical thermometry. Herein, a Dy 3+ -activated SrGdLiTeO 6 (SGLT:Dy 3+ ) phosphor was synthesized via a conventional solid-state reaction. Rietveld refinement confirms the phase-pure monoclinic double perovskite structure, revealing that Dy 3+ ions preferentially occupy the Gd 3+ sites. Upon near-UV excitation, the phosphor exhibits distinct blue ( 4 F 9/2 → 6 H 15/2 ) and yellow ( 4 F 9/2 → 6 H 13/2 ) emissions with tunable intensity and stable emission color as a function of dopant concentration. Notably, the anomalous enhancement of the 458 nm band with temperature enables the construction of two fluorescence intensity ratio (FIR) modes, yielding maximum relative sensitivities of 2.75% K −1 and 2.87% K −1 , respectively. Moreover, the phosphor maintains over 70% of its room-temperature emission intensity at 500 K, indicating robust thermal stability. This work offers a practical approach for developing Dy 3+ -activated phosphors with reliable optical thermometry performance and potential applicability in non-contact temperature sensing devices.
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·Vol. 49
·期 3
·4971-4978
·
IF 5.532
Qiyun Liu,Meihua Wu,Boli Chen,Ximing Huang,Mingyong Liu,Yifei Liu,Ke Su,Xin Min,Ruiyu Mi,Zhaohui Huang
The development of non-contact thermometers is one of the important applications of phosphors. In this work, a photoluminescence strategy by introducing Dy 3+ for application in fluorescence intensity ratio thermometry (FIR) was investigated in detail. The FIR approach employs the fluorescence intensity ratios of 4 I 15/2 - 6 H 15/2 and 4 F 9/2 - 6 H 13/2 , due to the Boltzmann variant distribution between two excited states at specific temperatures. The crystal structure, morphology, and luminescence behaviors of CaLa 4 (SiO 4 ) 3 O: Dy 3+ were studied. When the excitation wavelength is 348 nm, two strong emission peaks of CaLa 4-x (SiO 4 ) 3 O: xDy 3+ at 478 and 573 nm respectively, as well as two small emission peaks located at 456 nm and 661 nm. The optical temperature measurement performance of the phosphors at different temperatures (298 K–548 K) was achieved because of the different thermal quenching transitions of 4 F 9/2 - 6 H 15/2 and 4 F 9/2 - 6 H 13/2 . The maximum relative sensitivity and absolute sensitivity of the as-prepared phosphors as optical thermometers could reach as high as 0.1673% K −1 at 298 K and 0.007087% K −1 at 548 K, respectively. Therefore, we hope that our research on the temperature measurement of CaLa 4 (SiO 4 ) 3 O: Dy 3+ series phosphors can lay a certain research foundation and reference value for the subsequent research on the temperature measurement direction of Dy 3+ doped phosphors.
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Zezhi Chen,Huimin Li,Ran Pang,Da Li,Lihong Jiang,Aliaksandr M. Maliarevich,Su Zhang
In this work, a GdMgAl 11 O19: Dy 3+ phosphor with dual functions of optical temperature sensing and white light illumination was synthesized using the high-temperature solid-state method. When excited by 348 nm UV light, the phosphor emits warm white light, and its luminescence behavior exhibits both overall thermal stability and local thermal sensitivity. By utilizing the reverse response characteristics of the luminescence intensity of two blue emission bands corresponding to Dy 3+ thermally coupled level transitions ( 4 F 9/2 → 6 H 15/2 , 452 nm; 4 I 15/2 → 6 H 15/2 , 476 nm) with temperature, its optical temperature sensing potential was explored using the fluorescence intensity ratio (FIR) method. Experimental results show that this phosphor can perform temperature detection over a wide range of 298-973 K, with a relative sensitivity of 0.746% K -1 at 298 K. Among all emission peaks, the 452 nm emission peak is a locally thermally sensitive peak, accounting for a very small proportion of the overall emission and having no decisive effect on the overall luminescence. The fluorescence intensities of the 476 nm blue, 570 nm yellow, and 663 nm red emissions, however, show consistent attenuation with increasing temperature. Even when the temperature rises to 423 K, the fluorescence intensity still retains 85% of its initial room temperature value, indicating excellent overall thermal stability. GdMgAl 11 O 19 : Dy 3+ phosphor integrates the dual functions of high-stability white LED and wide-range high-sensitivity optical temperature sensing. This study provides important reference for the application expansion of Dy 3+ -doped phosphors in LED devices and temperature detection systems, as well as for the development of multifunctional phosphors.
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高影响因子
JOURNAL OF LUMINESCENCE
·
2023
·
IF 3.6
Renping Cao,Caiping Chen,Fangrui Cheng,Ting Chen,Bang Lan,Lan Li,Ru Liu,Jing Wang
In this work, we synthesize Ca 3 Bi(PO 4 ) 3 :Dy 3+ , Ca 3 Bi(PO 4 ) 3 :Eu 3+ , and Ca 3 Bi(PO 4 ) 3 :Eu 3+ , Dy 3+ . The crystal structure, phase purity, and the luminescence properties of samples are investigated, respectively. Ca 3 Bi(PO 4 ) 3 :Dy 3+ under excitation at 350 nm shows yellow emission because of the 4 F 9/2 → 6 H 15/2 , 6 H 13/2 , 6 H 11/2 , and 6 H 9/2 transitions of Dy 3+ . Ca 3 Bi(PO 4 ) 3 :Eu 3+ with excitation at 394 nm emits red-orange emission due to the 5 D 0 → 7 F 1 , 7 F 2 , 7 F 3 , and 7 F 4 transitions of Eu 3+ ion. Ca 3 Bi(PO 4 ) 3 :Dy 3+ , Eu 3+ with excitation at 394 nm mainly shows the emission of Eu 3+ , however, that with excitation at 350 nm mainly derive from Dy 3+ ion. We investigate the effects of the ratio between Dy 3+ and Eu 3+ in Ca 3 Bi(PO 4 ) 3 :Eu 3+ , Dy 3+ on the luminescence properties. The energy transfer from Dy 3+ to Eu 3+ in Ca 3 Bi(PO 4 ) 3 :Eu 3+ , Dy 3+ is found. We analyze the luminous mechanism of samples by energy level diagrams of Dy 3+ and Eu 3+ ions. The results are helpful for the research of other Dy 3+ and Eu 3+ co-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 NON-CRYSTALLINE SOLIDS
·
2024
·
IF 3.2
Zhichao Jin,Zhongli Zhu
A series of SiO 2 -B 2 O 3 -ZnO-La 2 O 3 -BaO (SBZLBa) glasses doped with Dy 3+ and Eu 3+ were synthesized using the melt-quenching technique. Their optical characteristics and potential applications in W-LED devices were investigated. The structural effects resulting from doping the glass with Dy 3+ and Eu 3+ ions were elucidated through infrared spectroscopy and an examination of the physical properties. The variations in emission intensity within the fluorescence spectrum validated the sensitizing effect of Dy 3+ on Eu 3+ within the glass matrix. By manipulating the transitions of both Dy 3+ and Eu 3+ , the excitation wavelength was altered, enabling the realization of cool white, neutral white, and warm white luminescence, thus accommodating the diverse requirements for white light emission in lighting applications. After incorporating 1.0 mol% of Dy 2 O 3 and 0.8 mol% of Eu 2 O 3 , respectively, the glass exhibited CIE coordinates of (0.3332, 0.3535), positioning it within the white light spectrum and in close proximity to the ideal white light coordinates of (0.33, 0.33). The SBZLBa-Dy 2 O 3 –0.8Eu 2 O 3 glass exhibited a quantum yield of 5.98 %. It has been demonstrated through acid and alkali resistance tests that this glass possesses excellent chemical stability. Additionally, temperature-dependent emission spectra have revealed that the luminous intensity of the glass maintains over 85 % of its room temperature value at 185 °C, with Eα determined to be 0.2387 eV.
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
·
2020
·
IF 3.28
Wanggui Ye,Yuzhen Wang,Chong Zhao,Zicheng Wen,Zhiquan Cao,Zhijun Cao,Xiaofei Shen,Yingkui Li,Xuanyi Yuan,Chong Wang,Chaoyang Ma,Yongge Cao
Herein, we propose a series of unprecedented Dy 3+ -doped triclinic Gd 2 Ge 2 O 7 nanophosphors by solid-state reaction method. As the doping concentration arises, the XRD peaks shift to large angle and absorption edge energy increases from 5.42 to 5.45 eV. Under 275 nm excitation, Dy 3+ ions are sensitized by Gd 3+ and exhibits two strong emission peaks at 484 and 575 nm as well as two weak emission peaks at 455 and 663 nm. The interaction between Gd 3+ and Dy 3+ is dipole-dipole interaction and the critical distance is estimated to be 16.58 Å. For sample with optimal doping concentration, along with temperature increases from 300 to 570 K, PL intensity of 484 nm and 575 nm slightly decreases, while that of 455 nm sharply increased about 4 times. The interval of thermally coupled levels Dy 3+ : 4 F 9/2 and 4 I 15/2 is estimated to be 1317 cm −1 . Population at Dy 3+ : 4 I 15/2 , 4 F 9/2 energy levels in GGO lattice can be attributed to thermally-coupled levels of Dy 3+ and phonon-assisted absorption transition of Gd 3+ . The temperature sensitivity of 1.5 at% Dy 3+ ions in GGO is calculated to be as high as 2029.5/T 2 . This work paves a new way to search for high performance optical thermometric materials based on phonon-assisted transition and energy-transfer mechanism.
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2022
·Vol. 33
·期 16
·12965-12975
·
IF 2.779
Ye Zhiqi,Cheng Zhiyuan,Liu Tong,Shi Tian,Gao Fuhao,Khan Wasim Ullah,Zhang Yueli
Lanthanide-doped Ca 3 Ln(AlO) 3 (BO 3 ) 4 phosphors are adopted for numerous new types of applications with outstanding optical properties. Herein, the novel Ca 3 Gd(AlO) 3 (BO 3 ) 4 :Dy 3+ phosphors were synthesized by the high-temperature solid-state method. X-ray diffraction, scanning electron microscopy, transmission electron microscopy, diffuse reflection spectroscopy, and as well as photoluminescence (PL) spectra and lifetime curves are used to exemplify the resulting samples. This research explores the samples microstructure and the influence of Dy 3+ doping at the Ca and Gd sites. The PL spectrum results indicated that Ca 3 Gd(AlO) 3 (BO 3 ) 4 :Dy 3+ can be effectively excited by 349 nm UV light and emits bright white light results of Dy 3+ ions with the 4f–4f transition. The optimum doping content of the Dy 3+ in the Ca 3 Gd(AlO) 3 (BO 3 ) 4 host samples were 7 mol%, and the concentration quenching (CQ) mechanism was mainly owing to dipole–dipole interaction. Interestingly, the Ca 3 Gd 0.93 (AlO) 3 (BO 3 ) 4 :0.07Dy 3+ showed exceptional thermal-quenching resistance of > 87.3% intensity at 350 K. The temperature-sensing properties of Ca 3 Gd 0.93 (AlO) 3 (BO 3 ) 4 :0.07Dy 3+ ranging from 300 to 500 K were analyzed and had shown a decent maximum S A value about 1.35% K −1 at 500 K between 455 and 669 nm fluorescence intensity ratio. Hence, the novel Ca 3 Gd 0.93 (AlO) 3 (BO 3 ) 4 :0.07Dy 3+ materials could be a competent candidate for low-cost and non-contact optical thermometry in a high-temperature environment.
研究领域:
材料科学
·
光学材料
·
发光光谱学
·
固态化学
·
传感器技术
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DOI
高影响因子
危险品化学品经营许可证（带存储）