Ceramics-Switzerland
·
2026
·Vol. 9
·期 7
·69
·
IF 2.8
Yuan Tu,Jiawen Li,Chaoyong Deng,Min Zhang
A novel Dy3+-doped self-activated Sr2NaMg2V3O12(SNMVO) phosphor was synthesized via a high-temperature solid-state reaction method. Its microstructure, surface morphology, valence state, and luminescence properties were investigated. The results showed that the prepared phosphor exhibited bright green emission at 521 nm and yellow emission at 575 nm under 345 nm excitation. The luminescence intensity showed a strong concentration dependence, with an optimal Dy3+ion doping concentration of 0.05 mol, and the concentration quenching (CQ) mechanism was dipole–dipole (d-d) interaction. Energy transfer between vanadate and Dy3+was observed, with a maximum transfer efficiency of 63.5%. The thermal activation energy (0.1859 eV) indicated good thermal stability. Furthermore, this phosphor can be used as a yellow phosphor for white light-emitting diodes (wLEDs) and for anti-counterfeiting patterns.
✓ 已验证
DOI
高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 23
·4183
·
IF 5.719
Yu Zhang,Xiang Li,Dahai Hu,Qier Sa,Xinran Wang,Fengxiang Wang,Kaixuan Wang,Xuelian Zhou,Zhiqiang Song,Yongfu Liu,Kefu Chao
LEDs for plant lighting have attracted wide attention and phosphors with good stability and deep-red emission are urgently needed. Novel Cr3+and Dy3+co-doped Gd3Al4GaO12garnet (GAGG) phosphors were successfully prepared through a conventional solid-state reaction. Using blue LEDs, a broadband deep-red emission at 650–850 nm was obtained due to the Cr3+ 4T2→4A2transition. When the Cr3+concentration was fixed to 0.1 mol, the crystal structure did not change with an increase in the Dy3+doping concentration. The luminous intensity of the optimized GAGG:0.1Cr3+, 0.01Dy3+was 1.4 times that of the single-doped GAGG:0.1Cr3+. Due to the energy transfer from Dy3+to Cr3+, the internal quantum efficiency reached 86.7%. The energy transfer from Dy3+to Cr3+can be demonstrated through luminescence spectra and fluorescence decay. The excellent properties of the synthesized phosphor indicate promising applications in the agricultural industry.
研究领域:
材料科学
·
光学材料
·
发光二极管
·
光子学
·
农业照明
✓ 已验证
DOI
高影响因子
PHYSICA B-CONDENSED MATTER
·
2026
·
IF 3.2
Tao Chen,Guangyao Zhu,Jing Li,Chaoying Yan,Yao Xiao,Caixia Yang
Li 2 ZnGeO 4 : Dy 3+ , Eu 3+ phosphors were successfully synthesized by solid-state reaction. The phosphor samples exhibited high-quality white light emission under 391 nm excitation. The optimal doping concentration of Eu 3+ in Li 2 ZnGeO 4 : Dy 3+ , Eu 3+ phosphors is 0.3%. Subsequently, as the doping concentration of Eu 3+ increases, a concentration quenching phenomenon occurs. The internal quantum efficiency of Li 2 ZnGeO 4 : 0.2Dy 3+ , 0.2Eu 3+ phosphor is 37.7%. Within the temperature range of 423K to 473K, Li 2 ZnGeO 4 :0.2Dy 3+ ,0.2Eu 3+ phosphors exhibit excellent thermal stability, with a thermal quenching activation energy of 0.2472 eV. The luminous intensity at 423 K can be maintained at more than 76.0% of the room temperature. The synthetic Li 2 ZnGeO 4 : Dy 3+ , Eu 3+ phosphors were combined and packaged with 387 nm ultraviolet chips to fabricate LED devices. Under the drive of current, they emitted bright white light with a color rendering index Ra of 80.7. When the current varies from 20 mA to 220 mA, the emission spectrum intensifies, indicating the stable illumination characteristics of the prepared Li 2 ZnGeO 4 : Dy 3+ , Eu 3+ phosphors. The characteristic of spectral stability enhancement under high current meets the high-load working requirements of lighting appliances and provides material support for the upgrading of related electrical appliances.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2020
·Vol. 103
·期 12
·6847-6859
·
IF 3.502
Yan Sun,Fei Yu,Meisong Liao,Juping Ma,Xin Wang,Dongbing He,Weiqing Gao,Jonathan Knight,Lili Hu
In this work, we systematically study the spectroscopic properties of Tb 3+ /Dy 3+ co-doped phosphate glasses in the visible spectral region and explore the sensitization role of Dy 3+ in the enhancement of visible fluorescence of Tb 3+ ions. Judd-Ofelt parameters Ω 2 and Ω 4 /Ω 6 of the phosphate glass as host for Tb 3+ are calculated as 21.60 × 10 -20 cm 2 and 0.73, respectively, based on the measured spectral absorption. Multiple energy transfer (ET) routes from Dy 3+ to Tb 3+ and their efficiencies are characterized, and the enhanced fluorescence properties of Tb 3+ are investigated, including the emission spectral strength and the spontaneous emission lifetime as functions of Dy 3+ doping concentration. The efficient nonradiative ET processes between Dy 3+ and Tb 3+ allow a moderate concentration level of Tb 3+ to achieve favorably stronger spectral absorption at blue and ultraviolet wavelengths. Tb 3+ /Dy 3+ co-doped phosphate glass shows promising potential for phosphors and lasing operation at visible wavelengths.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Ou Hai,Mengkang Pei,Enlong Yang,Qiang Ren,Xiulan Wu,Yujing Zhao,Liang Du
The single color of long afterglow luminescence materials is one of the important factors restricting its development. Here, we uniformly disperse all-inorganic cesium lead halide (CsPbBr 3 ) perovskite quantum dots (PeQDs) with strong stability on the surface of Sr 2 MgSi 2 O 7 :Eu 2+ ,Dy 3+ (SMS) to adjust the afterglow luminescence color. CsPbBr 3 PeQDs has high quantum yield, and its excitation spectrum (around 400–500 nm) overlaps with the emission spectrum (around 465 nm) of SMS, so that the tunable afterglow emission from blue (around 465 nm) to green (around 525 nm) can be achieved by controlling the dosage of CsPbBr 3 PeQDs, and its chromaticity coordinates can be from (0.1280, 0.1360) to (0.2010, 0, 7460). The quantum yield of the composite remains almost unchanged, and the luminescence intensity remains stable and does not decrease when the composite is irradiated by ultraviolet light for 2 h; When exposed to air, the luminescence property remained about 80 percent after 10 days. This study provides a research direction for the polychromatic adjustment of long afterglow luminescent materials.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2023
·Vol. 15
·期 9
·2077
·
IF 5
Longfei Zhang,Ying Wang,Limin Peng,Zhilin Chen,Shaoyi Lyu,Siqun Wang
Long-term relief of indoor volatile pollution has become a competitive issue worldwide in both visible and dark environments. A novel self-luminous wood coating with carbon dots (CDs)/titanium dioxide (TiO2) nanomaterial coated SrAl2O4: Eu2+, Dy3+(CDs/TiO2@SAO) composite was prepared for the long-term degradation of formaldehyde through a simple sol-gel method. The microstructure, chemical composition, ultraviolet-visible (UV-vis) spectra, and long-lasting fluorescence of the CDs/TiO2@SAO photocatalyst were analyzed to illustrate the mechanism for degrading formaldehyde. The obtained CDs with a particle size of ~2–7 nm have a good graphite structure and presented good absorption in visible light. In addition, owing to the synergistic effect of the CDs/TiO2nanomaterial coating layer and the long-afterglow luminescence of the SAO phosphor, the CDs/TiO2@SAO composite can absorb a part of the visible light for photocatalytic degradation and store luminous energy efficiently at daytime so as to give out visible luminescence continuously for a few hours in the darkness. Furthermore, the functional wood coatings with CDs/TiO2@SAO composite presented continuous and efficient photocatalytic activity in the presence and absence of light exposure. The current research could provide a new strategy for designing an efficient photocatalyst for degrading formaldehyde pollution in the daytime with a visible light supply and in an indoor dark environment without an external light source.Keywords:carbon dots;core-shell microspheres;SrAl2O4: Eu2+, Dy3+phosphor;titanium dioxide;surface modification;photocatalytic degradation
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanomaterials
·
2020
·Vol. 10
·期 7
·1249
·
IF 4.324
Jun Xiao,Cong Wang,Xin Min,Xiaowen Wu,Yangai Liu,Zhaohui Huang,Minghao Fang
Advances in solid-state white-light-emitting diodes (WLEDs) necessitate the urgent development of highly efficient single-phase phosphors with tunable photoluminescence properties. Herein, the Tm3+, Dy3+, and Sm3+ions are incorporated into the orthorhombic NaGdTiO4(NGT) phosphors, resulting in phosphors that fulfill the aforementioned requirement. The emission spectrum of Tm3+ions overlaps well with the adsorption spectra of both Dy3+and Sm3+ions. Under the excitation at 358 nm, the single-phase NaGdTiO4: Tm3+, Dy3+, Sm3+phosphor exhibits tunable emission peaks in the blue, yellow, and red regions simultaneously, resulting in an intense white-light emission. The coexisting energy transfer behaviors from Tm3+to Dy3+and Sm3+ions and the energy transfer from Dy3+to Sm3+ions are demonstrated to be responsible for this phenomenon. The phosphors with multiple energy transfers enable the development of single-phase white-light-emitting phosphors for phosphor-converted WLEDs.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2021
·
IF 3.599
Juping Ma,Yan Sun,Fei Yu,Tianfeng Xue,Lili Hu
Tb 3+ ions doped optical materials have emerged as gain media for green fiber lasers. Dy 3+ ions were proposed as a sensitizer of Tb 3+ ions in glasses to increase the excitation efficiency, yet a systematic understanding of the impact of Dy 3+ doping on spectroscopic and physiochemical properties of glasses remains lacking. Here, using Tb 3+ /Dy 3+ doped fluoride glass as a model system, we reveal that Dy 3+ doping not only enhances Tb 3+ emission intensity, but also increases the thermal stability of fluoride glasses. Detailed spectroscopic characterizations indicate that co-doping Dy 3+ ions boosts visible luminescence intensity of Tb 3+ ions in fluoride glasses due to sensitization of Tb 3+ by Dy 3+ ions. Importantly, we deeply research the energy transfer process , ascertain several important factors affecting energy transfer efficiency and propose optimal doping concentrations of Tb 3+ and Dy 3+ ions for visible emission. We envisage that our finding provides a new perspective for the synthesis of Tb 3+ -doped fluoride glasses with enhanced thermal stability, and may be extended for the fabrication of Tb 3+ -activated optical fibers .
研究领域:
光学材料
·
无机非金属材料
·
光子学
·
稀土掺杂玻璃
·
光纤激光器
✓ 已验证
DOI
高影响因子
OPTICAL MATERIALS
·
2020
·
IF 2.779
Xuening Yang,Qihu Li,Xiao Li,Bin Ma
A series of Sr 9 Ga(PO 4 ) 7 : xDy 3+ (x = 0.00 ~ 0.18) phosphors were successfully synthesized via high-temperature solid-phase synthesis. The excitation and emission spectra of Sr 9 Ga(PO 4 ) 7 : xDy 3+ phosphor due to energy transfer from the Ga–O group to Dy 3+ can be detected by excitation at 259 and 482 nm. It is possible to adjust the luminous color from the blue light region to white light region through single-doping Dy 3+ in Sr 9 Ga(PO 4 ) 7 matrix, which is applicable for W-LEDs. Based on the temperature-dependent luminescence properties, Sr 9 Ga(PO 4 ) 7 : Dy 3+ phosphors has excellent thermal stability with absolute sensitivity (Sa) and relative sensitivity (Sr) at 598K of 0.018 K −1 and 0.87%K −1 , respectively by the fluorescence intensity ratio (FIR) technology. Therefore, the color tunable phosphor can be used as a thermal sensor in high-temperature environments.
研究领域:
材料科学
·
光学传感器
·
发光材料
·
固态化学
·
测温技术
✓ 已验证
DOI
高影响因子
JOURNAL OF RARE EARTHS
·
2025
·
IF 7.2
Guodong Zhang,Yue Lu,Yaning Zhao,Peipei Dang,Hao Suo,Zhijun Wang,Panlai Li
Incorporating rare-earth (RE 3+ ) ions into lead-free halide double perovskites represents a promising strategy for modulating their optical properties through energy transfer mechanisms. In this study, Dy 3+ ions were successfully incorporated into Cs 2 NaLuCl 6 :Sb 3+ double perovskites via a facile hydrothermal method. The synthesized crystals not only exhibit intense blue emission originating from self-trapped excitons (STEs) but also display effective Dy 3+ characteristic emissions, thereby broadening the emission spectrum from the visible to the near-infrared region. The energy transfer from STEs to Dy 3+ is confirmed and extends across various RE 3+ ions. Temperature-dependent photoluminescence spectra reveal insights into the excitation and emission processes, as well as thermal quenching mechanism. Additionally, the characteristic emissions of Dy 3+ demonstrate varied anti-thermal quenching behaviors, indicating the remarkable thermal stability of the synthesized crystals. The thermally coupled sub-levels of Dy 3+ ions are employed to develop optical thermometers with notable sensitivity. Finally, the light-emitting diodes fabricated by encapsulating the optimized samples onto commercial chips highlight the great potential of Dy 3+ -doped Cs 2 NaLuCl 6 :Sb 3+ materials for photoelectric applications.
研究领域:
材料科学
·
光学物理
·
固体物理
·
无机化学
·
纳米技术
·
光子学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2024
·Vol. 35
·期 16
·1-14
·
IF 2.8
Cao Renping,Cao Ya,Rong Yongtong,Lan Bang,Nie Jingheng,Zhang Lei,Chen Yuyu,Wang Jing
Eu 3+ and Dy 3+ as activators in luminescence materials have been widely investigated because of their superior luminous properties. In this work, we synthesize Sr 2 MgSi 2 O 7 :Dy 3+ , Sr 2 MgSi 2 O 7 :Eu 3+ , and Sr 2 MgSi 2 O 7 :Eu 3+ , Dy 3+ in air via the solid-state reaction method. We research crystal phase and purity of all samples via XRD, discern their crystal structure and space-group, and investigate their luminescence properties. The yellow emission of Sr 2 MgSi 2 O 7 :Dy 3+ with emission spectrum in the range of 450–775 nm can be observed due to 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+ ion. The red emission of Sr 2 MgSi 2 O 7 :Eu 3+ in the range of 550–725 nm is shown owing to the 5 D 0 → 7 F 1 , 7 F 2 , 7 F 3 , and 7 F 4 transitions of Eu 3+ ion. Sr 2 MgSi 2 O 7 :Eu 3+ , Dy 3+ under excitation 388 nm shows yellow emission with chromaticity coordinates (0.3578, 0.3911) and glows red–orange light with chromaticity coordinates (0.5753, 0.3863) under excitation 394 nm. Sr 2 MgSi 2 O 7 :Eu 3+ , Dy 3+ can shows tunable emission when the ratio between Eu 3+ and Dy 3+ ions is changed. The energy transfer from Dy 3+ to Eu 3+ ions are known via the spectral features. Sr 2 MgSi 2 O 7 :Eu 3+ , Dy 3+ has a good thermal stability. Luminous mechanisms and energy transfer process of samples are analyzed by the energy level diagrams of Dy 3+ and Eu 3+ ions.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Chemistry
·
2024
·
IF 6.7
Noor Zamin Khan,Sayed Ali Khan,Weilong Chen,Jahangeer Ahmed,Muhammad Amin Padhiar,Nisar Muhammad,Marcin Runowski,Saad M. Alshehri,Shu-Sheng Pan,Ren-Kui Zheng
The advancement of double perovskite oxide phosphors has expanded their applications, encompassing white light-emitting diodes (LEDs) to optical thermometry and scintillation detection. We have synthesized novel Ca 2 LuTaO 6 phosphors characterized by double perovskite structures by employing the high-temperature solid-state reaction technique. Upon excitation with 312 nm UV light, these undoped phosphors emit a broad blue light centered at 424 nm. We thoroughly investigated the origin of this blue emission using computational and experimental methods. The Ca 2 LuTaO 6 phosphors were further doped with Dy 3+ or Dy 3+ and Sm 3+ ions, which results in a broadband tunable-color emission covering the entire visible region (400–700 nm). Under 354 nm excitation, the single doped Ca 2 LuTaO 6 :Dy 3+ exhibits two emission bands due to the 4 F 9/2 → 6 H 15/2 (blue) and 4 F 9/2 → 6 H 13/2 (yellow) transitions of Dy 3+ . The single doped Ca 2 LuTaO 6 :Sm 3+ generates a red emission (603 nm) when excited at 407 nm from 4 G 5/2 to 6 H 7/2 transition. The optimized Ca 2 LuTaO 6 :0.05Dy 3+ and Ca 2 LuTaO 6 : 0.05Dy 3+ /0.04Sm 3+ phosphors show excellent thermal stability. Even at a temperature of 150 °C, i.e. typical temperature of the working LED electronics, the luminescence intensity for the single-doped sample with Dy 3+ maintains 82 % of its initial value. On the other hand, at the same temperature conditions, for the phosphors co-doped with Dy 3+ and Sm 3+ , the intensity remains at 90 % of Dy 3+ peaks with a slight chromaticity shift. A study of the electroluminescent performance of the Ca 2 LuTaO 6 :0.05Sm 3+ and Ca 2 LuTaO 6 :0.05Dy 3+ /0.04Sm 3+ phosphors were conducted using 365 nm LED chips to investigate their applications in white light-emitting diodes (WLEDs). The results confirm that Ca 2 LuTaO 6 :Dy 3+ /Sm 3+ phosphors have great potential for general illumination purposes, as the single-phase light sources.
研究领域:
材料科学
·
光学
✓ 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）