JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
·
2022
·Vol. 105
·期 2
·500-510
·
IF 2.606
Huang Anding,Wu Yikun,Pan Zixin,Wang Bangyu,Liang Xiaoping
In order to improve the water resistance of SrAl 2 O 4 :Eu 2+ , Dy 3+ , the composite long afterglow material Sr 2 MgSi 2 O 7 :Eu 2+ , Dy 3+ @ SrAl 2 O 4 :Eu 2+ , Dy 3+ was prepared by covering uniform and stable Sr 2 MgSi 2 O 7 sol on SrAl 2 O 4 :Eu 2+ , Dy 3+ powder, which was synthesized via traditional solid-state method. The effects of various factors, such as the amount of ammonia, the molar ratio of Sr 2 MgSi 2 O 7 :SrAl 2 O 4 and the content of H 3 BO 3 , on the structure and luminescent properties of Sr 2 MgSi 2 O 7 :Eu 2+ , Dy 3+ @ SrAl 2 O 4 :Eu 2+ , Dy 3+ were investigated by the response surface method. The results show that the influence extent on both the initial afterglow brightness and water resistance are as follows:the amount of ammonia> the content of H 3 BO 3 > the molar ratio of Sr 2 MgSi 2 O 7 :SrAl 2 O 4 . When the amount of ammonia, the molar ratio of Sr 2 MgSi 2 O 7 :SrAl 2 O 4 and the content of H 3 BO 3 is 1.64 mL, 11.10, and 0.006 mol, respectively, both the brightness and water resistance of Sr 2 MgSi 2 O 7 :Eu 2+ , Dy 3+ @ SrAl 2 O 4 :Eu 2+ , Dy 3+ are improved, the water resistance is 0.835 (51.82% higher than that of pure SrAl 2 O 4 ) and the initial afterglow brightness can reach 2793 mcd/m 2 (91.69% higher than that of pure SrAl 2 O 4 ), which were in good agreement with the predicted optimum value of 0.867 and 2720 mcd/m 2 , respectively. Under the optimization conditions, the synergistic action of SrAl 2 O 4 with excellent afterglow properties and Sr 2 MgSi 2 O 7 with high water resistance plays an important role in improving the water resistance without sacrificing brightness. Finally, the water-based light-emitting inks with SMSA as fluorescent pigment exhibit excellent luminescent properties in the dark.
Graphical abstract
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
ECS Journal of Solid State Science and Technology
·
2022
·Vol. 11
·期 6
·066004
·
IF 2.483
Yu-Guo Yang,Qing-Li Luo,Lei Wei,Hua-Jian Yu,Cheng-Cheng Qiu,Qing-Gang Li,Xu-Ping Wang,Bing Liu,Ji-Yang Wang,Jing-Feng Li
The Dy3+/Eu3+ doped CaBi2Ta2O9 phosphors had been obtained via the sintering processes at 1200 °C for 3 h. The phase and luminescence performance of the prepared phosphors had been researched. The X-ray diffraction results indicate the pure orthorhombic phase of the prepared phosphors. When the phosphors are excited at 355 nm, the Dy3+/Eu3+ single doped CaBi2Ta2O9 phosphors exhibit the characteristic emission bands corresponding to Dy3+ and Eu3+, and the Dy3+/Eu3+ codoped CaBi2Ta2O9 phosphors exhibit tunable luminescence on account of the Dy3+ → Eu3+ energy transfers. In this process, the dipole-dipole interaction is dominated.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2023
·
IF 3.6
Renping Cao,Binhui Zhong,Jingheng Nie,Lei Zhang,Yuyu Chen,Lan Li,Ting Chen,Jing Wang
Researchers usually co-dope other ions in Mn 4+ doped phosphors to improve and regulate their luminescence properties for the improvement of their practicality. Here, we synthesize SrLa 2 Al 2 O 7 :R (R Dy 3+ , Mn 4+ , and Dy 3+ /Mn 4+ ) samples by solid-state method in air. The crystal structure and phase purity are confirmed by XRD patterns of samples. We investigate the morphology, luminescence properties, optimal doping concentration of Dy 3+ and Mn 4+ ions, lifetimes as well as the energy transfer from Dy 3+ to Mn 4+ ions. We observe yellow emission of SrLa 2 Al 2 O 7 :Dy 3+ under excitation 355 nm in the region from 450 nm to 650 nm with chromaticity coordinates (0.4684, 0.5035) due to the 4 F 9/2 → 6 H 15/2 and 6 H 13/2 transitions of Dy 3+ ion. SrLa 2 Al 2 O 7 :Mn 4+ under excitation 355 nm emits far-red light in the region from 650 nm to 810 nm with chromaticity coordinates (0.7141, 0.2858) due to the transition 2 E g → 4 A 2g of Mn 4+ ion. SrLa 2 Al 2 O 7 :4mol%Dy 3+ , 0.5mol%Mn 4+ under excitation 355 nm contains the emission of both Dy 3+ and Mn 4+ , and shows red emission with chromaticity coordinates (0.5899, 0.4055). The energy transfer process from Dy 3+ to Mn 4+ ions in SrLa 2 Al 2 O 7 :Dy 3+ , Mn 4+ is verified by the spectral characteristics. The luminous mechanisms of samples are analyzed by energy level diagrams of Dy 3+ and Mn 4+ ions.
研究领域:
材料科学
·
光物理学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2024
·
IF 4.3
Renping Cao,Jinrong Wang,Binhui Zhong,Ting Chen,Bang Lan,Fangrui Cheng,Ru Liu,Jing Wang
New tunable-color luminescent materials with single pure phase are one of the main research objectives at present. We synthesize La 7 Nb 3 W 4 O 30 :R (LNWO:R) (R Dy 3+ , Eu 3+ , and Dy 3+ /Eu 3+ ) in air. The high temperature solid-state method is used. We study the purity, crystal phase and structure, luminescence properties, and lifetimes of the samples. Excitation spectrum of LNWO:Dy 3+ comes from the O 2− - Dy 3+ charge transfer band (CTB) and the f – f electron transitions of Dy 3+ . LNWO:Dy 3+ can glow yellow light due to the transitions 4 F 9/2 → 6 H 15/2 , 6 H 13/2 , 6 H 11/2 , and 6 H 9/2 of Dy 3+ . LNWO:Eu 3+ has excitation spectrum due to the O 2− - Eu 3+ CTB and the f – f electron transitions of Eu 3+ . LNWO:Eu 3+ emits the red-orange/red light owing to the transitions 5 D 0 → 7 F 1 , 7 F 2 , 7 F 3 , and 7 F 4 of Eu 3+ . The emitting color of LNWO:Dy 3+ , Eu 3+ can be adjusted by changing the excitation wavelength and the content of Dy 3+ and Eu 3+ because of the double effects of energy transfer among Eu 3+ ions and energy of Dy 3+ . The yellow, red-orange, and red emission of LNWO:Dy 3+ , Eu 3+ is found. The lifetime rises with adding doped-ions concentration owing to the increase of non-radiative transitions. The luminous mechanism is analyzed via energy level diagrams. The research results offer a help for the development of new 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
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 21
·10025-10035
·
IF 3.3
Renping Cao,Zibin Lai,Yewen Cao,Fangrui Cheng,Chenxing Liao,Shuijing Nie,Xuehua Yi,Jing Wang
Luminescent materials used in solid-state lighting usually face the challenge of the adjustment of luminescence properties. The coordinated luminescence of two activators in luminescent materials is a good method. Herein, CaAl2Si2O8:Dy3+, CaAl2Si2O8:Eu3+, and CaAl2Si2O8:Dy3+, Eu3+ with a pure phase (CaAl2Si2O8) were synthesized in air. The X-ray diffraction patterns of the samples were measured and their crystal structures were elucidated. Under excitation at 350 nm, the yellow emission of CaAl2Si2O8:Dy3+ in the spectral range of 525–800 nm was observed due to the 4F9/2 → 6H15/2, 6H13/2, 6H11/2, and 6H9/2 transitions of Dy3+ ions. CaAl2Si2O8:Eu3+ showed red emission in the range of 550–720 nm because of the transitions 5D0 → 7F1, 7F2, 7F3, and 7F4 of Eu3+ ions when it was excited by 394 nm light. A tunable color emission of CaAl2Si2O8:Dy3+, Eu3+ from yellow to red was found when the ratio between Dy3+ and Eu3+ ions was changed. We investigated the concentration-dependent spectra and ensured the optimal Dy3+ and Eu3+ concentrations in host CaAl2Si2O8. The spectra of the samples manifested the energy transfer from Dy3+ to Eu3+ ions. The energy-level diagrams of Dy3+ and Eu3+ ions were used to analyze the luminous mechanism of the samples. The research results are beneficial to the development of other Dy3+ and Eu3+ 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 MOLECULAR STRUCTURE
·
2022
·
IF 3.841
Renping Cao,Yunfei Zheng,Ting Chen,Bang Lan,Lan Li,Qinghu Zhong,Shuijing Nie,Jing Wang
In this work, Ca 3 MgSi 2 O 8 :R ( R = Dy 3+ , Eu 3+ , and Eu 3+ /Dy 3+ ) phosphors are synthesized in air by using the high-emperature solid-state reaction method. The crystal phase, crystal structures, lifetimes, and luminescence properties are investigated. Ca 3 MgSi 2 O 8 :Eu 3+ phosphor with excitation at 394 nm emits red-orange light and its emission spectrum covers the region from 575 nm to 720 nm due to the 5 D 0 → 7 F 0 , 7 F 1 , 7 F 2 , 7 F 3 , and 7 F 4 transitions of Eu 3+ ion. Ca 3 MgSi 2 O 8 :Dy 3+ phosphor under excitation at 350 nm exhibits yellow-green emission with four emission bands in the range of 460–500 nm, 550–600 nm, 650–680 nm, and 740–775 nm, which are attribuited 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, respectively. The energy transfer from Dy 3+ to Eu 3+ ions in Ca 3 MgSi 2 O 8 :Eu 3+ , Dy 3+ phosphor can be confirmed by the spectral properties. The tunable emission properties of Ca 3 MgSi 2 O 8 :Eu 3+ , Dy 3+ phosphor from yellow-green to red-orange can be fulfilled by the change of the excitation wavelength or the concentration proportion between Dy 3+ and Eu 3+ ions. The luminous mechanism and energy transfer of Ca 3 MgSi 2 O 8 :Eu 3+ , Dy 3+ phosphor are explained by the energy level diagrams of Eu 3+ and Dy 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
FERROELECTRICS
·
2022
·
IF 0.695
Rong Tang,Jinyu Huang,Jing Liao,Jinjin Fu,Bin Deng,Gong-Guo Zhang,Ruijin Yu
A series of novel Sr3WO6:xDy3+ (0.01 ≤ x ≤ 0.35) yellow emitting phosphors are synthesized using the conventional high-temperature solid-state method. The phase analysis and optical properties are discussed in detail. Through the X-ray diffraction (XRD) analysis, the obtained phosphors are identified to be pure phases. The Sr3WO6:Dy3+ phosphors emit bright yellow emission light at 578 nm under 352 nm excitation, which is ascribed to the 4F9/2-6H13/2 transitions. The optimum doping concentration is 0.02 mol. The activation energy Ea is calculated to be 0.154 eV. The Commission International de L'Eclairage (CIE) coordinates and correlated color temperature (CCT) of the Sr3WO6:xDy3+ (0.01 ≤ x ≤ 0.35) is located in the yellow region. All results indicate that the Sr3WO6:Dy3+ phosphors have the potential to be applied in the white light-emitting diode (w-LED) field.
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
KEY ENGINEERING MATERIALS
·
2016
·
IF 0
Chao Quan,You Fu Zhou,D.C. Huang,Wen Tao Xu
SrAl2O4:Eu2+,Dy3+ long-lasting phosphors were incorporated AlN successfully by a conventional solid-state reaction in the reductive atmosphere. When a certain amount of AlN was doped, the specimen SrAl2O4-3xN2x: Eu2+, 0.01Dy3+ (x = 0.0-0.2) maintained the phase purity. Under the excitation at 398nm, an intense broadband emission centered at 514 nm, originating from the 4f65d1→4f7 transition of Eu2+, was observed. It is noteworthy that partial nitridation leads to an enhancement in the emission intensity up to 240%. The study of thermal stability shows that the intensity of SrAl2O3.55N0.3:Eu2+,0.01Dy3+ phosphor still remains 72% at 150 °C comparing with the initial, while only 62% for the un-doped phosphor. Taking enhanced photoluminescence (PL) property and good thermal stability into account, SrAl2O4-3xN2x:Eu2+, 0.01Dy3+ is a promising candidate for the phosphors used in alternating current (AC) LEDs.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
MATERIALS CHEMISTRY AND PHYSICS
·
2024
·
IF 4.3
Zheng Li,Yuling Su,Yuying Zuo,Gaoshang Gong,Yaran Duan,Minghao Wang,Maocai Wei,Yongqiang Wang
In this paper, the crystal structure, vacancies, magnetoelectric properties and magneto-thermal properties of Gd 1- x Dy x CrO 3 (0 ≤ x ≤ 0.5) samples were reported. In crystal structure analysis, after doping Dy 3+ , the lattice constant and the grain size of the sample decreases. The results of positron annihilation lifetime study indicates that the overall electron density near defect increases and that appeared as a gradual decreasing trend of τ 2 with Dy 3+ concentration. The ferromagnetism of the sample gradually decreased after doping, and the T N (Cr) of the sample decreased systematically with increasing concentration of Dy 3+ . Moreover, the introduction of Dy 3+ inhibited the magneto-electric coupling and weakened the magneto-thermal properties of the samples. This result reveals the effect of Dy 3+ doping on the structure, magnetic properties, magnetothermal and dielectric properties of GdCrO 3 .
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2022
·Vol. 15
·期 6
·2177
·
IF 3.748
Wanjuan Tang,Qingfeng Guo,Ke Su,Haikun Liu,Yuanyuan Zhang,Lefu Mei,Libing Liao
Whitlockite has the advantages of a low sintering temperature, high stability, and a low fabrication cost, and it is widely used as the host for luminescent material. In this study, Ca1.8Li0.6La0.6−x(PO4)2:xDy3+phosphor was prepared by the high-temperature solid-state method, and its structure, composition, and luminescence properties were systematically studied. The results showed that a new whitlockite type matrix was prepared by replacing Ca2+in whitlockite with monovalent and trivalent cations. The prepared phosphors belonged to a hexagonal crystal system with a particle size in the range of 5–20 μm. Under the excitation of 350 nm UV light, the samples emitted white light, and there were mainly two stronger emission peaks at 481 nm in the blue band and 573 nm in the yellow band, which correspond to the electron transitions at4F9/2→6H15/2and4F9/2→6H13/2of Dy3+, respectively. The optimal doping concentration of Dy3+in Ca1.8Li0.6La0.6(PO4)2matrix was 0.03 (mol%). The main mechanism of concentration quenching in the sample was dipole–dipole energy transfer. When the temperature was 130 °C, the luminescence intensity of the samples was 78.7% of that at 30 °C, and their thermal quenching activation energy was 0.25 eV. The CIE coordinates of the sample at 30 °C were (0.2750, 0.3006), and their luminescent colors do not change with temperature. All the results indicate that Ca1.8Li0.6La0.6−x(PO4)2:xDy3+phosphor is a luminescent material with good luminescence performance and thermal stability, which shows a promising application in the field of LED display.Keywords:phosphor;whitlockite;Dy3+
研究领域:
材料科学
·
光电
·
发光材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
OPTIK
·
2019
·
IF 1.914
Jianjun Duan,Shixue Sun,Yanjie Zhang,Jingjie Yu,Nianyu Zou,Ailing Zou
A series of Dy 3+ /Sm 3+ co-doped KZnPO 4 phosphors were synthesized by the conventional solid-state reaction method. The crystal structure, luminescent characteristic and lifetime were studied by X-ray diffraction, photoluminescence properties and decay life. Dy 3+ /Sm 3+ co-doped and Sm 3+ doped KZnPO 4 phosphors exhibited high crystallinity in structure from XRD results. Under the ultraviolet (UV) or near-ultraviolet (NUV) excitation, KZnPO 4 : Dy 3+ , Sm 3+ phosphors emitted adjustable color coordinates light by changing the content of Sm 3+ ions, which indicated the phosphors might be of potential application in display and lighting. The optimum Sm 3+ concentration is 0.005. Furthermore, energy transfer from Dy 3+ to Sm 3+ was confirmed by the emission spectra and the decay time of co-doped phosphors.
研究领域:
材料科学
·
光电材料
·
荧光粉材料
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2025
·
IF 4.2
Linfang Ma,Yanan Li,Xiaoyi Liu,Shengda Liu,Guixia Liu,Dan Li,Jinxian Wang,Wensheng Yu,Xiangting Dong
The self-activated and rare earth Dy 3+ and Eu 3+ ions doped Na 2 YMg 2 V 3 O 12 phosphors with single garnet structure were obtained by using solid state reaction method. Self-activated Na 2 YMg 2 V 3 O 12 phosphors have a wide excitation band in near-ultraviolet range, Dy 3+ and Eu 3+ ions were co-doped in Na 2 YMg 2 V 3 O 12 host to broaden the excitation peak range of the phosphors. Using 365 nm near-ultraviolet light as the excitation wavelength, Na 2 YMg 2 V 3 O 12 :Dy 3+ ,Eu 3+ phosphors simultaneously emit sharp transition peaks of Dy 3+ ions at 487 nm and 576 nm, and red transition peaks of Eu 3+ at 595 nm, 611 nm and 635 nm. The energy transfer processes between VO 4 3− , Dy 3+ and Eu 3+ were discussed. The multicolor light emitting can be adjustable and white light can be realized due to the changing amount of the doped ions. Emission spectra dependent of temperature showed that Na 2 YMg 2 V 3 O 12 :Dy 3+ , Eu 3+ phosphors had good thermal quenching performance, indicating that the phosphors can be used in the field of near ultraviolet excited WLED.
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）