Materials Research Express
·
2018
·Vol. 5
·期 10
·106203
·
IF 1.151
Tao Pang,Wenbo Peng
Upconversion luminescence of Yb3+/Er3+ and Yb3+/Tm3+ co-doped Y2(MoO4)3 phosphors under 980 nm excitation is investigated. It is demonstrated that Yb3+ co-doping causes a significant thermal effect. For Yb3+ and Er3+ co-doped case, the thermal effect, the long-distance energy migration and the energy transfer from Er3+ to Yb3+ are responsible for the abnormal luminescence quenching. In the case of Yb3+ and Tm3+ co-doped, the thermal effect improves the excited efficiency of Tm3+, and thus the luminescence of Tm3+ continues to strengthen at the Yb3+ concentration that causes Er3+ luminescence quenching. These results contribute to the design of the efficient upconversion materials.
研究领域:
材料科学
·
光学
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Xiaoqing Guo,Shuangju Song,Xue Jiang,Jingru Cui,Yunshuai Li,Wenqing Lv,Haiyan Liu,Yuanyuan Han,Liyong Wang
In this present work, a room temperature coprecipitation method for the synthesis of CaMoO 4 @SiO 2 :Ln (Eu 3+ , Tb 3+ , Dy 3+ ) phosphors was reported. These particles were characterized using X-ray diffraction (XRD), Energy dispersive spectrometer (EDS), Fourier Transform IR spectroscopy (FTIR), scanning electron microscope (SEM), UV-visible spectrophotometer and photoluminescence (PL) respectively. The results indicated that emission intensity of SiO 2 modified samples increased by about 2 times, compared with no-silica modified samples. Multicolor phosphors were also designed by changing the lattice activators (Eu 3+ , Tb 3+ , Dy 3+ ). To further explore its applications, the transparent photoluminescent film was developed through the incorporation of polyvinyl alcohol (PVA), and selective and sensitive detection performance on dichromate was demonstrated in detail. In addition, red emission LED devices was assembled with as-prepared phosphors. The present results provide not only the high-performance phosphors modified by silica , but also a deep explanation of the structure-property relationship of the as-prepared sample. Based on these findings, it can be foreseen that these microparticles will be applied in versatile filed.
研究领域:
材料科学
·
光学
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产品关联
DOI
高影响因子
OPTICAL AND QUANTUM ELECTRONICS
·
2020
·Vol. 52
·期 6
·1-8
·
IF 1.842
Wang Weirong,Tuo Tianye,Jiang Chun
A facile pathway for solid-state material luminescence enhancement is proposed here by coating graphene on the surface of luminescent material. Ln 3+ (Yb 3+ /Er 3+ )-doped germanium tellurite glasses are prepared by conventional melting and quenching method. With the excitation of 980 nm laser diode, the photo-luminescence intensities of the graphene-coated and uncoated glass samples are measured with different incidence angle of excitation light. When the incidence angle is less than 15°, luminescence enhancement can be observed in the coated samples compared with uncoated one. The insight for the enhancement is also discussed.
研究领域:
材料科学
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光学
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产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2016
·Vol. 41
·期 2
·709-716
·
IF 3.277
Yuexin Wang,Yanhua Song,Yi Li,Tingting Cui,Xiuqing Zhou,Ye Sheng,Keyan Zheng,Hongpeng You,Haifeng Zou
LuVO4:Eu3+ nano/microcrystals with different morphologies/sizes including nanoparticles, nanosheets, nanodisks, nanoquadrangles, sub-microflakes, microspheres, and bulks were successfully synthesized by a mild solvothermal process using tartaric acid (TA) as the template. The amount of tartaric acid (TA) and the initial pH value play vital roles in controlling the morphologies of LuVO4 products. Besides, the reaction temperature was responsible for the generation of pure LuVO4 crystals in the presence of TA. Based on this, the possible formation mechanism of multi-morphologies was proposed. Furthermore, the dependence of luminescence performance on morphology has been discussed in detail. The LuVO4:Ln3+ (Ln = Tm3+, Er3+, Sm3+, Eu3+) nanoparticles show the characterized transition of Ln3+ and give bright blue, green, orange-red and red emission. Moreover, blue-green, green-yellow, pink, yellow-pink and white light can be obtained by adjusting the amount of doped Ln3+ ions and the corresponding concentrations of the LuVO4 host. This general and simple method may be of much significance in the synthesis of many other rare earth inorganic materials.
研究领域:
材料科学
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光学
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DOI
高影响因子
Advanced Optical Materials
·
2025
·
IF 7.2
Wenqian Xu,Xiangyu Zhang,Yuqiang Wang,Dingjun Jia,Dangli Gao
Persistent luminescence (PersL) materials hold immense potential for information storage and anti-counterfeiting applications. However, realizing non-volatile optical memory remains challenging. Herein, we design Mg 2 GeO 4 :Bi 3+ ,Ln 3+ (Ln = Tb, Eu) PersL phosphors via non-equivalent substitution engineering, where Bi 3+ and Ln 3+ ions deliberately occupy non-equivalent Mg1/Mg2 sites to create bistable deep traps. This strategy generates an ultra-broadband, high-density trap distribution, enabling strong photo/thermo-stimulated luminescence for recalling excitation-field temperatures. The trapped carriers exhibit temperature-dependent storage and release dynamics, allowing reconstruction of excitation thermal histories. Based on this unique behavior, reconfigurable optical memory anti-counterfeiting patterns in phosphor films are demonstrated. The trapping mechanism, validated by thermoluminescence and XPS spectra, reveals that carrier redistribution follows Fermi-Dirac statistics governed by the interaction between trap levels and thermal lattice waves. This work opens new avenues for non-volatile optical data storage with high security and spatiotemporal resolution.
研究领域:
材料科学
·
光学存储
·
发光材料
·
固态物理
·
信息安全
✓ 已验证
产品关联
DOI
高影响因子
Sustainable Materials and Technologies
·
2026
·
IF 9.7
Hong Chen,Wei Ou,Hongchang Huang,Junlan Li,Juncheng Liu
Both the 2D titanium carbide (Ti 3 C 2 T x ) MXene and the 3D rare earth doped zirconium-based metal organic framework (Ln 3+ @UiO-66, MOF) were constructed on the colorless transparent polyimide (CPI) film to form the heterojunction multifunctional nano-coating via a one-pot immersion method in order to improve the UV resistance of CPI. Firstly, the S/CPI film was obtained via the CPI being modified with silica (SiO 2 ) sol, and then the Ti 3 C 2 T x MXene was loaded onto the surface of the S/CPI film via the hydrogen bond, finally the Ln 3+ @UiO-66 was loaded onto the ultra-thin Ti 3 C 2 T x MXene nanosheets to obtain optimal sample (MXene/Ln 3+ @UiO-66-S/CPI). The transmittance of MXene/Ln 3+ @UiO-66-S/CPI is 93.33%, which is only 0.94% lower than that of S/CPI. The tensile strength and elongation of MXene/Ln 3+ @UiO-66-S/CPI are basically the same as those of S/CPI. The attenuation values of transmittance, tensile strength, and elongation for MXene/Ln 3+ @UiO-66-S/CPI film after 5000 equivalent sun hours (ESHs) UV irradiation are 2.44%, 10%, and 18%, respectively, i.e., this film gets both a high transparency and a super ultraviolet resistance. This may be attributed to the fact that the MXene/Ln 3+ @UiO-66 multifunctional nano-coating can absorb the UV light and undergo the down-conversion, weakening the UV irradiation intensity.
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Changhong Li,Jin Wang,Junxia Wang,Huachuan Ding,Zhaohui Zhang
In this work, a series of high-entropy component Ln 3 + (HEcp- Ln 3 + ) doped zirconolite ceramics Ca 1- x ( Ln 1/5 ) x ZrTi 2- x Al x O 7 (Ln = La, Nd, Sm, Eu, Gd; x = 0.0∼1.0) were successfully prepared by a high-temperature solid-state reaction method. The XRD and Raman results showed that the sample transforms from the zirconolite-2M structure to the -3O structure with increasing HEcp- Ln 3+ doping content to x = 0.8. The SEM-EDS results revealed the as-prepared samples have dense microstructures and homogeneous elemental distribution. The MCC-1 results indicated that the representative samples of Ca 0.5 ( Ln 1/5 ) 0.5 ZrTi 1.5 Al 0.5 O 7 with 2M structure and ( Ln 1/5 )ZrTiAlO 7 with 3O structure show superior aqueous stability compared to a single-component Nd 3+ /Sm 3+ doped zirconolite system. The chemical durability of zirconolite-3O seemed to be stronger than that of zirconolite-2M due to the difference in the leaching mechanism at the initial leaching stage or due to the high-entropy effect. The present study could be helpful for the design of high-entropy zirconolite-based waste forms for immobilizing plutonium and various minor actinides.
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Lisha Zhang,Yudong Ji,Weidong Li,Bing Zhang,Qiang Ma,Bowen Qin,Yilei Zhang,Dan Yue,Zhenling Wang
Lanthanide ions-doped fluoride nanocrystals have excellent application prospect. However, low photoluminescence quantum yield (PLQY) is usually along with lanthanide ions-doped fluoride nanocrystals owing to their low molar absorptivity and narrow absorption band . In order to increase the absorption cross section of Ln 3+ in fluoride nanocrystals, a facile synthesis strategy to enhance luminescence of AF 2 : Ln 3+ (A = Ca, Sr; Ln = Eu, Tb) by the use of carbon dots (CDs) has been developed in this work. A series of characterizations including TEM , XRD , FTIR and XPS demonstrated that the CDs have been successfully combined with the surface of AF 2 : Ln 3+ nanocrystals. The combination of CDs has little influence on the microstructure and phase structure of AF 2 : Ln 3+ , and CDs@AF 2 : Ln 3+ nanocrystals have uniform and regular shape with cubic phase. CDs are used as a broadband sensitizer and lead to the broadband excitation of Ln 3+ , resulting in the enhancement around 10-fold of Ln 3+ luminescence emission in AF 2 : Ln 3+ nanocrystals after CDs combination. The corresponding PLQY increases almost three times, and the luminescence enhancement mechanism by combining CDs is proposed. In addition, the CDs@AF 2 : Ln 3+ nanocrystals are used to prepare CDs@AF 2 : Ln 3+ /PVA films, which exhibits excellent luminescence properties under the excitation of UV light . This work provides a superior method for enhancing the luminescence properties of lanthanide ions-doped nanocomposites and demonstrates practical potential as promising candidates for light-converting thin films .
研究领域:
材料科学
·
光学
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产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2025
·
IF 4.7
Xiong Wang,Lingwei Zeng,Mengjia Chen,Zhouxi Li,Hu Zhou,Jianxian Zeng,Guoqing Liu,Tao Pang,Xiangcheng Wang,Yi Luo,Jianfeng Tang,Daqin Chen
Impurity doping is considered as a promising route to endow many functional materials with eminent properties, which may extend their applications in many research fields. As for the optical materials, great endeavors have been devoted to the fluorides over the past years, lanthanide orthovanadates receive less attention and focus. Herein, t-LaVO 4 :Ln 3+ (Ln = Eu, Dy, Sm, Tb) nanorods have been modified by the ZrOCl 2 addition, which are prepared through a hydrothermal synthesis technology. XRD, ICP, TEM, FT-IR and luminescence spectroscopy are employed to characterize the product. The morphology and luminescence performance of t-LaVO 4 :Ln 3+ nanorods could be modulated by deliberately control the ZrOCl 2 content. The average length and width of the nanorods decreases along with the increase of the ZrOCl 2 content. With regulating the content to 4 mol%, luminescence intensity are enhanced for several times and the decay lifetimes are prolonged to a certain extent. The growth mechanism and luminescence enhancement are discussed in detail. This report facilitates a novel approach for luminescence enhancement and widens the horizon for growth mechanism of LaVO 4 -based nanocrystals induced by impurity doping.
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DOI
高影响因子
OPTICAL MATERIALS
·
2023
·
IF 3.9
Jie Chen,Chao Wang,Yu Yin,Rong Liu,Fanxu Meng,Shanshan Wang,Zhigang Liu,Shihua Yu
Intelligent regulation of energy transfer process among different rare earth ions doped in the matrix is an effective strategy to realize high-performance upconversion (UC) luminescence. Based on this, wheat ears like Yb 3+ /Er 3+ /(Tm 3+ , Ho 3+ ) triple doped YF 3 microrods were fabricated via hydrothermal method , and the morphology, crystal structure, UC luminescence performance dependent on Tm 3+ /Ho 3+ doping concentrations were studied. By comparing with the Yb 3+ , Er 3+ co-doped YF 3 microrods, the UC luminescence intensity is enhanced in Yb 3+ /Er 3+ /(Tm 3+ , Ho 3+ ) triple doped YF 3 samples due to the cross relaxation processes between Er 3+ and Tm 3+ /Ho 3+ . Moreover, red emission is enhanced more significantly than green emission in YF 3 : Yb 3+ , Er 3+ , Tm 3+ , which is contrary to that in YF 3 : Yb 3+ , Er 3+ , Ho 3+ . The possible energy transfer upconversion mechanism involved is discussed in detail. Meanwhile, an adjustable emission color is easy to achieve via altering the doped Er 3+ /Tm 3+ /Ho 3+ ion concentration . These studies on the UC luminescence enhancement mechanism of Yb 3+ /Er 3+ /(Tm 3+ , Ho 3+ ) triple doped YF 3 microrods are expected to provide a reference for the development of high-efficiency luminescent materials .
研究领域:
材料科学
·
光学材料
·
光子学
·
稀土掺杂
·
纳米光子学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 20
·6588-6596
·
IF 6.4
Yingying Ma,Ting Wen,Ke Liu,Dequan Jiang,Mei-Huan Zhao,Chuanlong Lin,Yonggang Wang
Lanthanide ion (Ln3+)-codoped inorganic materials have been widely studied owing to their unique upconversion photoluminescence (UC PL) performance, which can be employed for promising applications in imaging, sensing, detection, and treatment. However, the forbidden transition of 4f inner shell and the nonradiative relaxation from the interaction of Ln3+ and a host lattice lead to low emission efficiency, limiting the industrial application. In this study, we report pressure-induced 1.2–2.6 times UC PL enhancement in the range of 10.0–25.0 GPa in Ln3+ (19%Yb3+/1%Er3+, 19%Yb3+/1%Ho3+, and 19.9%Yb3+/0.1%Tm3+)-codoped LiYF4 and LiLuF4. In situ X-ray diffraction pattern and Raman spectra indicated that both LiYF4 and LiLuF4 underwent structure transitions at a pressure around 10.0 GPa. Moreover, improved UC emissions were observed for the released sample in a completely amorphous state. The luminescence spectra of Eu3+-doped LiYF4 and LiLuF4 probes revealed that the phase transitions resulted in the reduction of Ln3+ site symmetry. Our research shows that pressure would be a powerful implement to design high-efficiency UC PL materials. Simultaneously, research on the “structure-luminescence” relationship can provide a deeper insight into the exploitation of potential UC PL materials and optimization of current luminescent materials.
研究领域:
材料科学
·
光学
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产品关联
DOI
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 89
·56229-56238
·
IF 3.108
Wei Wang,Yunxi Li,Shanshan Hu,Xuemei Zhang,Jianfeng Tang,Jun Yang
Ba3Sc2F12:Yb3+, Ln3+ (Ln = Er, Ho, Tm) crystals with various morphologies have been synthesized via a one step hydrothermal route. X-ray diffraction (XRD), scanning electron microscopy (SEM), and up conversion photoluminescence (UCPL) spectra were used to characterize the samples. The influences of surfactants, pH values, and molar ratio of F−/Sc3+ on the crystal phase, size and shape of final products have been studied in detail. The aspect ratio of products increased gradually with the increase of F−/Sc3+ molar ratio. Additionally, the luminescence properties of Ba3Sc2F12:Yb3+, Ln3+ (Ln = Er, Ho, Tm) crystals were systematically studied. The blue emission is attributed to the 1G4 → 3H6 transition of Tm3+; the green emission can be obtained due to the 2H11/2/4S3/2 → 4I15/2 transitions of Er3+ and the 5S2/5F4 → 5I8 transition of Ho3+; the red emission comes from the 4F9/2 → 4I15/2 transition of Er3+ and the 1G4 → 3F4 transition of Tm3+. Based on the generation of red, green, and blue emissions in the different Ln ion-doped Ba3Sc2F12, the white light emission can be obtained by appropriately doping Yb3+, Er3+, and Tm3+ in the present Ba3Sc2F12 crystals due to the color superposition principle. Here, the sample Ba3Sc1.5856F12:0.4Yb3+, 0.01Er3+, 0.0044Tm3+ crystals showed suitable intensity ratio of blue, green and red (RGB) emissions resulting in bright white light with CIE-x = 0.274 and CIE-y = 0.287, which was illustrated by a photograph under excitation of 980 nm. The prepared Ba3Sc2F12:Ln3+ phosphor has potential applications in the fields of three dimensional displays, back lighting and white light sources.
研究领域:
材料科学
·
光学材料
·
发光学
·
光子学
·
无机化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）