Journal of Materials Chemistry C
·
2025
·
IF 5.1
Shan shan Zhao,He-He Dong,Weichang Li,Lei Zhang,Shikai Wang,Chun Yu,Hu Li
Upconversion emission materials have many advantages, such as narrowband sharp line emission, excellent photochemical stability, and long lifespan. In particular, under 980 nm invisible laser-beam irradiation, materials with visible light upconversion luminescence have vital application value in optical anti-counterfeiting and laser displays. In this study, a library of upconversion phosphors of CaLaAl3O7:RE3+/Yb3+ (RE=Tm, Ho) was produced through a high-temperature solid-state reaction method. The powders exhibited different color emissions under different excited wavelengths. Under 980 nm laser excitation, Tm3+/Yb3+ co-doped phosphors exhibited upconversion emission of 474 nm blue light, which was attributed to the 1G4→3H6 transition of Tm3+, and the fitting slope of the upconversion luminescence intensity vs. laser-pump power density was n450-500=2.83, which indicated the three-photon absorption upconversion process. Additionally, Ho3+/Yb3+ co-doped phosphors had the strongest red emission at 660 nm, originating from the 5F4/5S2→5I8 transition of Ho3+, which belongs to the two-photon absorption process. Subsequently, the changes in chromaticity coordinates of the prepared samples were analyzed under different light excitations, and different light color emissions were observed. The color purities of Ho3+/Yb3+ and Tm3+/Yb3+ co-doped samples were 99.9% and 65.4%, respectively. Finally, we verified the practical application value of the prepared powder in the fields of multi-color luminescence optical anti-counterfeiting and laser displays. The results show that the produced phosphors have vital application potential in information security protection, optical data storage, and 3D laser displays.
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
DALTON TRANSACTIONS
·
2018
·Vol. 47
·期 26
·8697-8705
·
IF 4.099
Yang Ding,Jie Liu,Ming Zeng,Xishu Wang,Junli Shi,Weili Wang,Yanru Miao,Xibin Yu
Rare earth (RE3+)-doped NaY(MoO4)2 nanocrystals are efficient materials for realizing multicolor emission, which plays an important role in displays, W-LEDs, solar cells and biolabeling. Up to now, research on the multicolor tuning properties of RE3+-doped NaY(MoO4)2 nanoparticles has mostly focused on traditional preparation routes such as the hydrothermal method and sol–gel process. However, the products obtained using these methods are usually large in size (on the micron/submicron scale) and agglomeration problems are inevitable. With the development of nano optoelectronic devices and bioluminescence labeling, there is an urgent need to find an efficient method to prepare nanoscale, monodispersed and NaY(MoO4)2:RE3+ nanocrystals (NCs) with good crystallinity and stronger emission properties. In this work, we demonstrate a simple, fast, reproducible and one-step synthesis of NaY(MoO4)2:Eu3+ NCs with sizes varying from 1–20 nm via a ligand-assisted reprecipitation strategy. The reaction mechanism and emission intensities of NaY(MoO4)2:Eu3+ NCs with various morphologies have been discussed in detail. Furthermore, Tb3+ and Eu3+ ion co-doped NaY(MoO4)2 NCs were also prepared, and various emission colors were obtained and tuned from red, orange-red, yellow and yellow-green to green. Energy transfer between the Tb3+ and Eu3+ ions in the NaY(MoO4)2 host matrix has also been demonstrated. Finally, a highly efficient and stable NaY(MoO4)2:0.05Tb,0.04Eu NC-based W-LED device was built, which indicates the promising future application for this material in the field of lighting. The tunable multicolour emission, ease of preparation and nanosize reveal that NaY(MoO4)2:RE3+ NCs have a potential application in full color displays and W-LEDs.
研究领域:
材料科学
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纳米技术
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光学材料
·
无机化学
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光电子学
✓ 已验证
DOI
高影响因子
Materials Today Communications
·
2024
·
IF 3.7
Bingxin Yuan,Meiting Li,Chi Zhang
The RE 3+ doped YbNbO 4 and Yb 3 NbO 7 nanophosphors (RE=Ho, Er and Tm) were synthesized via a calcination-assisted hydrothermal procedure. YbNbO 4 intensified almost the whole up-conversion (UC)/down-conversion (DC) emissions of RE 3+ by ∼2 times when compared with Yb 3 NbO 7 components, indicating that a lower symmetry environment in the former case is more favorable for photoluminescence. UC luminescence in each case was dominated by a green band at ∼539 nm for Ho 3+ and a NIR band at ∼803 nm for Tm 3+ , while doping YbNbO 4 and Yb 3 NbO 7 with Er 3+ separately yielded the slightly stronger green 556 nm and red 658 nm emissions. The UC/DC luminescence mechanisms were elaborated via Yb 3+ → RE 3+ forward/backward energy transfer and cross relaxation.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2026
·
IF 19.9
Sen Zhang,Dan Zhao,Shuang Wu,Hao Cui,Yanhui Wang,Weiping Qin
Non-contact luminescence thermometry featuring high resolution and high sensitivity represents a crucial application of lanthanide upconversion materials. Nevertheless, primarily due to the thermal quenching (TQ) effect, traditional fluorides continue to present significant challenges in attaining real-time, high-sensitivity temperature sensing across a broad temperature spectrum. In this study, two thermometers are developed based on the thermal coupling energy levels (TCLs) and non-thermal coupling energy levels (NTCLs) of CaZrF 6 :3%Yb; 2%Er. Benefiting from the luminescence thermal enhancement induced by lattice thermal contraction, these ratio-type thermometers demonstrate the ability to operate within an extensive temperature range, spanning from relatively low to high temperatures (193 ∼ 793 K). TCLs and NTCLs display extraordinarily comparatively large relative sensitivity of 1.53 and 1.45% K −1 at room temperature. Most notably, based on NTCLs, the absolute sensitivity value consistently remains above 4.00 × 10 − 2 K −1 within the high-temperature range (393–793 K), and attains a maximum of 5.08 × 10 − 2 K −1 at 543 K, which is significantly higher than those of the vast majority of Yb 3+ /Er 3+ -doped optical temperature-measurement materials. These results offer a novel approach for the advancement of high-sensitivity and high-resolution sensor devices across a wide temperature range (Especially in high-temperature).
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF FLUORESCENCE
·
2011
·Vol. 22
·期 2
·729-736
·
IF 1.966
Li Yan-Yan,Yan Bing,Guo Lei
In this paper, the organic ligands TTA and TAA are grafted onto the coupling agent to achieve the organic precursors (TTA-Si, TAA-Si) as first ligand and the organic 4-(4-nitrostyryl)pyridine (Nspy) is synthesized as the second ligand. Both of them are coordinated to the rare ions with the carbonyl group and nitrogen atom respectively. After the hydrolysis and copolycondensation between the teraethoxysilane (TEOS) and the ternary rare earth organic complex via the sol–gel process, the chemical bonded hybrid materials are constructed and characterized in detail. The obtained hybrid materials present superior thermal stabilities and regular and homogenous square blocks microstructure. Among the hybrids Eu(TTA-Si) 3 Nspy shows a more strong characteristic emission and longer lifetime than the hybrids Eu(TAA-Si) 3 Nspy, while hybrids Tb(TAA-Si) 3 Nspy exhibits the stronger characteristic emission and longer lifetime than the hybrids Tb(TTA-Si) 3 Nspy. For Sm 3+ hybrid materials, the photoluminescence of Sm(TAA-Si) 3 Nspy is too weak to find in the characteristic emission spectra, meanwhile, Sm(TTA-Si) 3 Nspy has the excellent luminescent intensity.
研究领域:
材料科学
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光物理学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2017
·Vol. 53
·期 7
·4861-4873
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IF 2.599
Ding Yang,Liu Jie,Zhu Yan,Nie Siyang,Wang Weili,Shi Junli,Miu Yanru,Yu Xibin
One-dimensional CaMoO 4 :RE 3+ (RE = Eu, Sm, Dy, Tb) nanofibers were successfully synthesized through a facile supersaturated recrystallization process. These CaMoO 4 :Ln 3+ nanofibers have the length ranging from 40 to 70 nm and the width of nearly 2 nm. Under UV excitation, these single-doped CaMoO 4 nanofibers shown stronger emission, and the photoluminescence quantum efficiency is 25.7% (CaMoO 4 :Eu 3+ ), 22.4% (CaMoO 4 :Sm 3+ ), 23.2% (CaMoO 4 :Dy 3+ ) and 27.7% (CaMoO 4 :Tb 3+ ), respectively. Moreover, our work reveals that various emission colors can be obtained and tuned from pure red to delight green via co-doping Tb 3+ and Eu 3+ in the CaMoO 4 host, and the energy transfer properties from Tb 3+ to Eu 3+ are also demonstrated. Finally, we apply the green CaMoO 4 :Tb 3+ , red CaMoO 4 :Eu 3+ and white CaMoO 4 :0.05Tb 3+ , 0.02Eu 3+ for LED devices, and these nanofiber-based LEDs present high efficiency and stability, which indicates the promising application in future optoelectronic fields.
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
Gen Li,Yaqi Wang,Min Tao,Siqi Chen,Bozhi Zhou,Quan Li,Xin Li,Heming Deng,Hao Huang,Haoshuang Gu,Yuebin Li
Developing efficient strategies to fabricate planar photoluminescence scintillators is of great importance to explore X-ray detectors with new platform. Rare-earth (RE) doped Lu 2 O 3 thin films are successfully fabricated by mild aqueous phase electrochemical deposition on ITO/glass substrates with low-temperature post-annealing treatment. The as-prepared Lu 2 O 3 :RE 3+ (RE = Eu, Tb and Tm) thin films exhibit steerable thickness, high transparency in the visible-NIR range, and low transmittance at UV band mainly due to the oxygen-metal (O 2- -RE 3+ ) charge transfer processes and the 4f-4f transitions of the RE 3+ . The Lu 2 O 3 :RE 3+ thin films emit intense red, green and blue (RGB) photoluminescence, which mainly correspond to the 5 D 0 - 7 F 2 transition of Eu 3+ , 5 D 4 - 7 F 5 transition of Tb 3+ and 1 G 4 - 3 H 6 transition of Tm 3+ respectively. Moreover, the transparent Lu 2 O 3 :RE 3+ thin films also exhibit high sensitivity and linearity luminescence to the X-ray stimulation in a dose rate from 30 to 160 mGy s −1 . This rapid and energy-saving synthesis show high efficiency to fabricate rare-earth doped thin-film with a tunable optical performance for optoelectrical application in the fields of solar light concentrators, agricultural light conversion thin films, biosensors , photodetectors and especially the X-ray detectors.
研究领域:
材料科学
·
光学工程
·
医学影像
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2013
·Vol. 97
·期 3
·990-995
·
IF 2.107
Kuo Jiang,Songbai Liu,Yuan Li,Yaofei Li
Powders of zirconia doped with 8 mol% REO 1.5 (RE = Yb, Y, Gd, and Nd) were synthesized by using the sol–spray pyrolysis method. The effects of RE 3+ ionic radius on monoclinic (m) phase content of powders were investigated. The XRD results showed that the metastable tetragonal (t′) phase underwent a complete phase change to form m and cubic (c) phases after a heat treatment of 50–100 h at 1450°C. A cation size-dependent reduction in the m phase content of the REO 1.5 partially stabilized ZrO 2 powders was observed. The SEM–EDS analysis of the powders revealed that the RE 3+ concentrations in the c phases decreased with decreasing the RE 3+ ionic radius. These results indicate that the stabilizer concentration of the c phase can be attributed to RE 3+ ionic radii, resulting in different m phase contents. Compared to the REO 1.5 single doped ZrO 2 , the m phase contents of 8 mol% (RE 0.5 Yb 0.5 )–ZrO 2 (RE = Y, Gd, and Nd) powders were significantly reduced. The results prove that the stabilizer with a lower RE 3+ size is effective in reducing the m phase content of partially stabilized ZrO 2 after annealing at high temperatures.
研究领域:
材料科学
·
陶瓷学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）