MATERIALS RESEARCH BULLETIN
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2015
·
IF 2.288
Xiaoman Bi,Weiwei Zuo,Yingliang Liu,Zhenru Zhang,Cen Zeng,Shengang Xu,Shaokui Cao
Organic light-emitting molecular glasses (OEMGs) are synthesized through the introduction of nonplanar donor and branched aliphatic chain into electroluminescent emitters. The target OEMGs are characterized by 1 H NMR, 13 C NMR, IR, UV–vis and fluorescent spectra as well as elemental analysis, TG and DSC. The results indicated that the optical, electrochemical and electroluminescent properties of OEMGs are adjusted successfully by the replacement of electron-donating group. The non-doped OLED device with a standard red electroluminescent emission is achieved by spin-coating the THF solution of OEMG with a triphenylamine moiety. This non-doped red OLED device takes on an electrically stable electroluminescent performance, including the stable maximum electroluminescent wavelength of 640 nm, the stable luminous efficiency of 2.4 cd/A and the stable CIE1931 coordinate of ( x , y ) = (0.64, 0.35), which is basically in accord with the CIE1931 coordinate ( x , y ) = (0.64, 0.33) of standard red light in PAL system.
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高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Ying Li,Yong Hong Ma,Aihua Mao,Xiwei Qi
A series of transparent (1- y )La 2 O 3 –Ga 2 O 3 - y Sm 2 O 3 - x Eu 2 O 3 (where x = 0, 0.02, 0.04, 0.06, 0.08, 0.10, 0.12, 0.14, and y = 0, 0.04) were successfully synthesized using a containerless solidification process. Co-doping with Sm 3+ and Eu 3+ enhanced the energy absorption of Eu 3+ , notably improving the characteristic emission peak 5 D 0 - 7 F 2 of Eu 3+ . The peak emission intensity for y = 0.04 was observed at x = 0.08, attributable to the concentration quenching of Eu 3+ ions. As the concentration of Eu 3+ increased, the energy transfer effect on emission intensity diminished. Attributed to the energy transfer between Sm 3+ and Eu 3+ , Sm 3+ may primarily serve as the sensitizer, and Eu 3+ as the activator. According to the Dexter theory, which suggests that the interaction between activator ions and their adjacent ions is the primary mechanism of energy transfer and quenching among Eu 3+ ions and adjacent ions, an increase in Eu 3+ concentration leads to a decrease in the distance between Eu 3+ and adjacent ions, strengthening their interaction, and potentially inducing concentration quenching. Furthermore, with an increase in Eu 3+ concentration, the CIE chromaticity coordinates for the samples co-doped with Sm 3+ and Eu 3+ shifted significantly, enhancing the color purity of the emitted light and bringing it closer to the NTSC color standard coordinates (0.67, 0.33).
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Science Advances
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2025
·Vol. 11
·期 22
·
IF 12.5
Zi-Lin He,Jian-Bin Luo,Jing-Hua Chen,Jun-Hua Wei,Xiao-He Miao,Zhi-Zhong Zhang,Qing-Peng Peng,Xiu-Xian Guo,Dai-Bin Kuang
The development of melt-quenched organic-inorganic metal halide (OIMH) glasses is hampered by the scarcity of suitable organic molten salts and low luminescence efficiency. Herein, we developed a series of two-component OIMH amorphous glasses consisting of (TPG) 2 MnBr 4 (TPG + , triphenylguanidium) and A 2 MnBr 4 (A, organic molten cation), named α G (A x TPG y ). The high glass-formation ability (GFA) in (TPG) 2 MnBr 4 provides a platform to modulate the crystallization of another molten A 2 MnBr 4 by homogeneous melting. Moreover, the GFA modulation allows controlled in situ crystallization of α G (A x TPG y ) and the formation of transparent glass-crystal composites with higher luminescence efficiency. For instance, the light yield of α G (PTP 99 TPG 1 ) (PTP + , propyltriphenylphosphonium) is improved from 18,800 to 35,140 photons per mega–electron volt after annealing at 55°C, showing huge application potentials in radiation detection and high-resolution x-ray imaging. The present research would inspire further exploration of high-performance OIMH glasses and facilitate multiple applications in advanced photonics such as scintillators, photoconductive fibers, light-emitting diodes, and laser crystals.
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PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
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IF 8.5
Hao Deng,Chao Sun,Xinyue Yang,Xiaolu Chen,Qiyi Zhang,Yonggang Yan
The complex microenvironment of bone defects, particularly enhanced oxidative stress, poses significant clinical challenges for bone repair. Furthermore, the inadequate regulation of the regenerative microenvironment by conventional biomaterials substantially compromises healing efficacy. Herein, we developed tannic acid (TA)‑magnesium (Mg) metal-phenolic network (MPN) coated mesoporous bioactive glass nanoparticles (MBGNs@TA-Mg) and integrated them into glycidyl methacrylate-grafted gelatin (Gel-GMA) to fabricate GM/MBTM hydrogels. In vitro studies demonstrated that GM/MBTM hydrogels with excellent cytocompatibility, effectively scavenging free radicals and reactive oxygen species (ROS), and significantly promoting osteogenic differentiation of bone marrow mesenchymal stem cells (BMSCs). Meanwhile, the hydrogels displayed antimicrobial activity against Staphylococcus aureus ( S. aureus ). Therefore, this study establishes a novel strategy for designing multifunctional biomaterials capable of microenvironment modulation and enhanced bone regeneration.
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PubMed
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2020
·Vol. 103
·期 8
·4275-4285
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IF 3.502
Mengting Guo,Chongyun Shao,Yang Zhang,Jingbo Yu,Yan Jiao,Malgorzata Guzik,Georges Boulon,Jinjun Ren,Lili Hu
The homogeneous Yb 3+ /Al 3+ /B 3+ -co-doped silica glasses were prepared via a sol-gel method. The impact of B 2 O 3 addition on the physical and optical properties and network structure was systematically studied. The network structure was investigated by the Fourier Transform Infrared (FT-IR), Raman spectra, and Solid State Nuclear Magnetic Resonance (SSNMR). Herein, B 2 O 3 addition can continuously decrease the refractive index and density. When B 2 O 3 is lower than 2 mol%, B 2 O 3 addition can obviously decrease the scalar crystal field parameters, Yb 3+ asymmetry degree, Yb 3+ cross-sections, due to the generation of Yb–O–B bonds at the cost of partial Yb–O–Al/Si ones. When B 2 O 3 is more than 2 mol%, FT-IR, Raman spectra, and SSNMR results indicate that further increased B atoms prefer to connect with Si and Al rather than Yb. Consequently, the above parameters are basically unchanged. Based on the results, an intuitive model of structure and properties evolution during the substitution of SiO 2 by B 2 O 3 has been established.
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高影响因子
JOURNAL OF LUMINESCENCE
·
2025
·
IF 3.6
Junping Shi,Lielin Wang,Qibiao Wang,Chao Deng,Xiuqi Pu,Shidi Yao,Liang Jiang,Qiuyi Wang
Present study reveals the effects of varying concentrations of Pr 2 O 3 on the Spectral characteristics of 35PbO-60-xB 2 O 3 -5ZnO-xPr 2 O 3 (x = 0.5–3mol%) glasses, which were prepared using the melt-quench technique. The XRD and Raman results confirm that the glasses possessed the amorphous nature with borate complexes as the main structure units. From the absorption spectrum , the glass has a strong absorbance in the visible and infrared regions. The theoretical and experimental oscillator strengths ( f exp and f c a l ), phenomenological parameters (Ω 2 , Ω 4 , Ω 6 ) of Pr 3+ were calculated using the Judd-Ofelt theory. Strong emissions in the reddish orange region at 600 nm was observed due to the transitions of Pr 3+ ions from 1 D 2 → 3 H 4 at 444 nm excitation. The optimal concentration of Pr 2 O 3 in the glass is 1 mol%, exhibiting the highest photoluminescence intensity and the second longest decay time (microsecond order). The decay time reduction with increasing Pr 2 O 3 content, indicates the presence of resonant energy transfer between Pr 3+ ions. Therefore, the Pr 3+ -dope lead zinc borate glasses could be used for red LED.
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高影响因子
Journal of Materials Chemistry C
·
2026
·
IF 5.1
Yuqing Wang,Xiya Gao,Jing Li,Mingming Zhang,Kang Liu,Jixiang Xu,Zhan-Chao Wu,Lei Wang,Jun Xing
All-inorganic lead halide perovskite quantum dots (PQDs) glass exhibit exceptional potential for luminescent solar concentrators (LSCs) application due to their outstanding photoluminescence quantum yield (PLQY), stability, and scalable synthesis. However, the crystallization of PQDs into glass matrix usually involves complex and multi-step processes, presenting a significant hindrance to their practical application in LSCs. In this work, through alkali metal activation, we develop a one-step method to fabricate PQD glasses for high-efficiency and long-term stable LSCs. The alkali metal ions break the glass network, facilitates the nucleation and growth of PQDs in the glass. The PQDs glass reaches a high PLQY of 70% and maintains 75% of initial PL intensity after blue light irradiation for 2000 hours. The PQDs glass-based LSC devices achieve an optical efficiency of 35.9% and power conversion efficiency of 0.93% at geometric gain factor of 1.6. The work offers a promising strategy for designing highly efficient and stable perovskite-based LSCs.
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高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Hangtao Ye,Luojia Huang,Xiaoting Liu,Meiting Yang,Wenya Chen,Yihuang Chen,Weidong Xiang,Shuang Pan,Xiaojuan Liang
Although backlight display screens based on CdSe quantum dots (QDs) have basically solved the remaining problem of small display gamut, its high preparation cost limits its commercial development. In contrast, perovskite nanocrystals (NCs) with narrow band emission, simple preparation and low cost have made leaps and bounds in next-generation backlit displays luminescent material . However, the instabilities are the main issues to solve before we can apply these materials in modern displays. Researchers have precipitated perovskite NCs in inorganic glass substrates and compounded them with PDMS films for backlighting, but the important factors for commercialization have been ignored: Long-term stability under strong blue light irradiation and preparation cost. In this work, a unique melt-water quenching method combined with composition control was applied to prepare a series of glass powder. The optimal photoluminescence (PL) emission and color coordinates in the color coordinates of glasses powder were elaborately regulated by heat treatment temperature control and the introduction of rare earth Tb. Moreover, the passivation of the glass powder surface through special water treatment greatly improves its stability under long time blue light exposure. After irradiation under 20000 cd/m 2 blue light (460 nm) for 500 h, the PL intensity retention rate reaches 85% of commercial CdSe film. The red and green-emitting NCs glasses powder with high photoluminescence quantum yield (PLQY) and stability were combined with PET, PS and PDMS to form a composite film , afterwards, combined with Liquid crystal display ( LCD ) module shows a fuller color image. Finally, after comparison, PS film was demonstrated to be the most suitable choice for commercialization backlighting.
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高影响因子
COMPOSITES PART B-ENGINEERING
·
2023
·
IF 13.1
Muheng Liao,Shuangli Zhu,Anjie Guo,Xiyuan Han,Qingtao Li,Yi Chen,Yuwei Liu,Dafu Chen,Xiaofeng Chen,Shuixue Mo,Xiaodong Cao
The clinical treatment of long bone segmental defects (LBSD) remains a challenge worldwide due to the deficiency of bone transplantation donors. Developing bone tissue engineering scaffolds similar to cortical in strength and biological activity is a feasible solution. In this work, bioactive glasses with different ratios of copper and magnesium (Cu/MgBGs) were fabricated, and then processed by 3D printing and sintered at 700 °C to obtain porous BGs scaffolds with high strength and no crystallization. The compressive strength of Cu/MgBGs scaffolds with a high porosity (50.99 ± 1.2%) reached 109.27 ± 8.18 MPa, which matched the strength of cortical bone (90–150 MPa). The mineralization experiments confirmed that the scaffolds had good bioactivity before and after sintering. In vitro experiments showed that different ratios of Cu/Mg in BGs had a decisive role in osteogenesis and angiogenesis. Cu0.5/Mg7.5 group had an optimal osteogenic performance while Cu1.0/Mg7.0 group was best for angiogenesis. Also, the antibacterial experiment illustrated that the scaffolds had a good bacterial killing rate of above 95.29 ± 1.02%, which could effectively avoid the infection and broadened the application scenario of the scaffolds. In vivo animal experiments revealed that Cu0.5/Mg7.5 scaffold group had the best bone repair effect on rabbit radius segmental defect with the highest volume and quality of new bone formation. Therefore, Cu0.5/Mg7.5 BGs scaffolds provided an alternative option for the treatment of LBSD.
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JOURNAL OF NON-CRYSTALLINE SOLIDS
·
2022
·
IF 4.458
Yichen Ye,Yongbao Xiao,Yao Ji,Weichao Wang
Tellurite-based glass composed of TeO 2 -Ta 2 O 5 -ZnO (labeled as TTZ) is explored as the host material for a potential 2.7 μm fiber laser. It is found that the glass-forming region, structural and physical properties of TTZ glass undergo considerable changes when platinum crucible are adopted to prepare glass instead of alumina one. Especially, the Er 3+ -doped TTZ glass that melted in platinum crucible exhibits relatively larger absorption and emission cross-sections at 2.7 μm than that of alumina one. Further studies show that an enhanced 2.7 μm luminescence can be achieved from the heavily Er 3+ -doped TTZ glass, the absorption and emission cross-sections, figure of merit and maximum gain coefficient of Er 3+ -doped TTZ-Pt glasses at 2.7 μm are calculated to be 0.91 × 10 −20 and 1.01 × 10 −20 cm 2 , 3.18 × 10 −24 cm 2 ·s and 2.25 cm −1 , respectively, indicating that the Er 3+ -doped TTZ glass may be a promising candidate host for mid-infrared fiber lasers.
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CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Jiale Wu,Jin Hu,Zhongshan Deng,Yongjin Feng,Hongtao Fan,Zhiyi Wang,Kaijun Wang,Qingming Chen,Weijun Zhang
B 2 O 3 -MnO 2 -CdO ternary oxide glasses with amorphous properties were synthesised using the melt-quenching method. Structural and physical property analyses showed that the amount of non-bridging oxygen and the system stiffness increases, and the oxide network filling is more tightly packed as cadmium oxide (CdO) gradually replaces manganese Oxide (MnO 2 ) in the glass. The radiation-shielding performance of the B 2 O 3 -MnO 2 -CdO glasses was evaluated using the shielding parameters calculated by the MCNPX simulation and the Phy-X program. Glasses with 40% and 50% CdO loading exhibited an average specific lead equivalent (PbE) of 0.241 and 0.294 mmPb/mm in the medical X-ray diagnostic area at 0.03–0.08 MeV; thus, they could fully meet the specific PbE requirements for application as "protection devices against diagnostic medical X-radiation". Furthermore, their photon attenuation capability is superior to that of various commercial shielding glasses in fast-neutron nuclear applications at 1°–10 3 MeV. In addition, compared to the borate glass systems studied in the literature, B 2 O 3 -MnO 2 -CdO glasses have fast neutron removal cross-sections of 0.125 cm −1 at a smaller density of 3.9043–4.8135 g/cm 3 , making them potentially excellent fast neutron absorbers.
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高影响因子
JOURNAL OF NON-CRYSTALLINE SOLIDS
·
2019
·
IF 2.6
Haijian Li,Jianhua Yi,Zhao Qin,Zhihua Sun,Yi Xu,Changjian Wang,Fengqi Zhao,Yucheng Hao,Xiaofeng Liang
The effect of rare earth elements (Y, La, Nd, Sm, and Gd) on the structures, thermal expansion, chemical stability and crystallization behavior of phosphate-based glasses were characterized by using powder X-ray diffraction (PXRD), Scanning Electron Microscope (SEM), X-Ray Fluorescence (XRF), Diffuse reflectance UV–Visible spectra, thermal expansion coefficient, inductively coupled plasma mass spectrometry (ICP-MS) and Differential scanning calorimetry (DSC). UV–Vis spectra not only exhibit the absorption peaks of rare earth cations but also reveal the reduction of band gap (E g ) with increasing the cationic field strength (CFS) of rare earth elements, further establishing the change of non-bridging oxygen (NBOs) density in the glass structures. It is found that there is a decrease in thermal expansion coefficient (α) with increasing the CFS of rare earth, and the study shows a strong correlation between α values and NBOs in the rare earth phosphate glass systems. The chemical durability tests of glass blocks demonstrate that the normalized leach rates (NR RE ) increase with decreasing the radius of rare earth elements, and La-doped phosphate glass with high thermal expansion coefficient has good chemical durability. By a two-stage thermal treatment, a preliminary study of the crystallization mechanism for the rare earth phosphate glasses is carried out, and the major crystalline phases are identified.
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