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5H-Fluoreno [3,2-b:6,7-b’] Dithiophene Based Non-fullerene Small Molecular Acceptors for Polymer Solar Cell Application

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Journal of Wuhan University of technology(materials Science) 2019年第5期34卷 1220-1227页

作者： WU Jiansheng XIAO Shengqiang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology

Two novel non-fullerene small molecule acceptors were prepared with the conjugated backbone of 5 H-fluoreno[3, 2-b:6, 7-b’] dithiophene carrying the electron deficient unit of dicyanomethylene indanone(DICTFDT) and rhodanine(TFDTBR), respectively. The two acceptors exhibited excellent thermal stability and strong absorption in the visible region. The LUMO level is estimated to be at-3.89 eV for DICTFDT and-3.77 eV for TFDTBR. When utilized as the acceptor in bulk heterojunction polymer solar cells with the polymer donor of PBT7-Th, the optimized maximum power conversion efficiency of 5.12% and 3.95% was obtained for the device with DICTFDT and TFDTBR, respectively. The research demonstrates that 5 H-fluoreno[3, 2-b:6, 7-b’] dithiophene can be an appealing candidate for constructing small molecular electron acceptor towards efficient polymer:non-fullerene bulk heterojunction solar cells.

关键词： polymer solar cells bulk heterojunction non-fullerene acceptor

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Development of a gaseous and solid-state hybrid system for stationary hydrogen energy storage

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Green Energy & Environment 2021年第4期6卷 528-537页

作者： Haizhen Liu Li Xu Yu Han Xin Chen Peng Sheng Shumao Wang Xiantun Huang Xinhua Wang Chenglin Lu Hui Luo Shixuan He Zhiqiang Lan Jin Guo Guangxi Novel Battery Materials Research Center of Engineering Technology Guangxi Key Laboratory of Processing for Non-ferrous Metallic and Featured MaterialsGuangxi Colleges and Universities Key Laboratory of Novel Energy Materials and Related TechnologySchool of Physical Science and TechnologyGuangxi UniversityNanning530004China State Key Laboratory of Advanced Power Transmission Technology Global Energy Interconnection Research Institute Co.Ltd.Beijing102209China Institute of Energy Materials and Technology General Research Institute for Nonferrous MetalsBeijing100088China Department of Materials Science and Engineering Baise CollegeBaise 533000GuangxiChina Department of Materials Science and Engineering Zhejiang UniversityHangzhou 310027China

Hydrogen can serve as a carrier to store renewable energy in large ***,hydrogen storage still remains a challenge in the current *** is difficult to meet the technical requirements applying the conventional storage of compressed gaseous hydrogen in high-pressure tanks or the solid-state storage of hydrogen in suitable *** the present work,a gaseous and solid-state(G-S)hybrid hydrogen storage system with a low working pressure below 5 MPa for a 10 kW hydrogen energy storage experiment platform is developed and validated.A Ti-Mn type hydrogen storage alloy with an effective hydrogen capacity of 1.7 wt%was prepared for the G-S hybrid hydrogen storage *** G-S hybrid hydrogen storage tank has a high volumetric hydrogen storage density of 40.07 kg H_(2)m^(-3) and stores hydrogen under pressure below5 *** can readily release enough hydrogen at a temperature as low as-15C when the FC system is not fully activated and hot water is not *** energy storage efficiency of this G-S hybrid hydrogen storage system is calculated to be 86.4%-95.9%when it is combined with an FC *** work provides a method on how to design a G-S hydrogen storage system based on practical demands and demonstrates that the G-S hybrid hydrogen storage is a promising method for stationary hydrogen storage application.

关键词： Hydrogen energy Hydrogen storage materials Tank design System integration Performance validation

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Solar-driven H_(2)O_(2)production by S-scheme heterojunction photocatalyst

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Chinese Journal of Catalysis 2025年第5期72卷 24-47页

作者： Han Li Wang Wang Kaiqiang Xu Bei Cheng Jingsan Xu Shaowen Cao School of Automotive Materials Hubei University of Automotive TechnologyShiyan 442020HubeiChina State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070HubeiChina Hubei Technology Innovation Center for Advanced Composites Wuhan University of TechnologyWuhan 430070HubeiChina School of Chemical and Environmental Engineering Shanghai Institute of TechnologyShanghai 201418China School of Chemistry and Physics&Centre for Materials Science Queensland University of TechnologyBrisbaneQueensland 4001Australia

Hydrogen peroxide(H_(2)O_(2)),as an essential and green chemical,is extensively used in energy and environmental ***,the production of H_(2)O_(2)primarily relies on the anthraquinone method,which is an energy-intensive method involving multi-step reactions,producing harmful by-product ***-driven H_(2)O_(2)production,an alternative route for H_(2)O_(2)generation,is a green and sustainable technology since it only utilizes water and oxygen as ***,the rapid recombination of charge carriers as well as insufficient redox capability limit the photocatalytic H_(2)O_(2)production *** step-scheme(S-scheme)heterojunction photocatalysts has been regarded as an effective strategy to address these drawbacks because it not only achieves spatially separated charge carriers,but also preserves redox capability of the photocatalytic *** paper covers the recent advances of S-scheme heterojunction photocatalysts for H_(2)O_(2)production in terms of basic principles,characterization techniques,and preparation ***,the mechanism and advantages of S-scheme heterojunction for photocatalytic H_(2)O_(2)generation are systematically *** recent S-scheme heterojunction designs,including inorganic-organic heterojunction,inorganic-inorganic heterojunction,and organic-organic heterojunction,are ***,the challenges and research directions of S-scheme photocatalysts for H_(2)O_(2)generation are presented.

关键词： Step-scheme heterojunction H_(2)O_(2)photosynthesis Charge migration mechanism Solar conversion

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Nanoceramic composites with duplex microstructure break the strength-toughness tradeoff

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Journal of materials Science & technology 2020年第23期58卷 1-9页

作者： Ji Zou Hai-Bin Ma Jing-Jing Liu Wei-Min Wang Guo-Jun Zhang Zheng-Yi Fua State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan430070China School of Metallurgy and Materials University of BirminghamB152TTBirminghamUK China Nuclear Power Technology Research Institute Shenzhen518026China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials Institute of Functional MaterialsDonghua UniversityShanghai201620China

There is a strength and fracture toughness tradeoff in nanoceramic composite. The strength varies reciprocally with the grain size whereas the toughness contributed by compressive residual stress increases with the dimension of the second phase. In this work, a novel duplex microstructure with reinforced clusters composing of nanosized grains was proposed and validated using a model system of B_(4)C-TiB_(2) ceramics densified by carbide boronizing. As-obtained ceramics exhibit excellent combined mechanical properties at room temperature, including Vickers hardness, Young's modulus, flexural strength and fracture toughness(by surface crack in flexure method) of 32.1 ± 2.7 GPa, 506.9 ± 2.0 GPa,1175 ± 71 MPa and 5.1 ± 0.4 MPa m^(0.5), respectively. Both strength and toughness are at least ~30 % higher than the counterparts with similar composition but homogenously distributed TiB_(2) grains. Graphite onion was confirmed to be an intermediate product during reactive sintering, it facilitated the grain pullout during fracture and retained the nanometric TiB_(2) grain in the cluster, both of which also contribute the toughening and strengthening mechanisms in the B_(4)C-TiB_(2) ceramics.

关键词： Borides Microstructure In-situ reaction Mechanical properties Boron carbide Ceramics

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Strongly Enhancing the Energy Storage Properties and Stability of Amorphous BaTiO3 Thin Films via Ions Doping

SSRN

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SSRN 2024年

作者： Chang, Ruiling Yao, Zhonghua Xing, Yutong Wang, Jun Hao, Hua Cao, Minghe Liu, Hanxing State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Material Science and Engineering Wuhan University of Technology Wuhan430070 China International School of Material Science and Engineering Wuhan University of Technology Wuhan430070 China Sanya Science and Education Innovation Park of Wuhan University of Technology Sanya572000 China

Amorphous thin films with high power density and breakdown strength satisfy the needs of advanced power electronic systems. Nonetheless, improving the energy storage density of amorphous films is critical for addressing the growing demand for electricity. We apply high spontaneous polarization BaTiO3 as the main component to make (1-x)Ba(Ti0.99Mn0.02)O3-xBiFeO3((1-x)BTM-xBF) thin films. Doping BiFeO3 (BF) synergistically boosts polarization. The introduction of amorphous phases and Mn ions enhances the breakdown strength. The results demonstrate that, at x=0.10, the film can achieve both a high efficiency of 80.3% and an excellent energy storage density of 111.3 J cm-3. Moreover, the film has a strong thermal stability within a broad range of 20°C ~ 160°C, as well as the cycling reliability is as high as 105 times. The present study offers a practical approach to develop film capacitors with outstanding energy storage capabilities. © 2024, The Authors. All rights reserved.

关键词： Amorphous films

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The key Role of Subtle Substitution for a High-Performance Ester-Modified Oligothiophene-Based Polymer Used in Photovoltaic Cells

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Chinese Journal of Chemistry 2022年第24期40卷 2867-2874页

作者： Sunsun Li Yuan Ding Lei Xu Wenchao Zhao Jianqi Zhang Jinzhao Qin Yuyang Zhang Jingjing Zhao Chang He Qiming Peng Jianhui Hou Key Laboratory of Flexible Electronics(KLOFE)and Institute of Advanced Materials(IAM) Nanjing Tech University(NanjingTech)NanjingJiangsu211816 China Co-Innovation Center of Efficient Processing and Utilization of Forest Resources College of Materials Science and EngineeringNanjing Forestry UniversityNanjingJiangsu210037 China State Key Laboratory of Polymer Physics and Chemistry Beijing National Laboratory for Molecular SciencesInstitute of ChemistryChinese Academy of SciencesBeijing100190 China Key Laboratory of Nanosystem and Hierarchical Fabrication National Center for Nanoscience and TechnologyBeijing100190 China Jiangsu Seenbom Flexible Electronics Institute Co.Ltd NanjingJiangsu210043 China

In organic solar cells (OSCs), developing high-performing easily synthesized photoactive materials is essential for pursuing cost- effective balance. Herein, we have designed and synthesized a pair of wide-band-gap polymers (PBDE4T-0F and PBDE4T-2F), using the low synthesis cost dicarboxylic ester-substituted quaterthiophene as the building block. Despite the minor change of molecular structure for polymer PBDE4T-xF, the fluorine substituent in polymer PBDE4T-2F greatly enhances its interchain aggregation. The higher aggregation tendency of ester-modified polymer in solution is beneficial for reducing both the aggregate size and π-π stacking distance of blend film, which contribute to the highly efficient exciton dissociation and symmetric charge transport. An impressive power-conversion efficiency (PCE) of 16.1% is achieved for the PBDE4T-2F:BTP-eC9-based device, while its counterpart only delivers a PCE of 5.8% with distinctly lower short-circuit current density (J_(sc)) and fill factor. Notably, the aggregation effect of donor polymer has also been found to be associated with the energy level shifts, and thus the variation of charge transfer energy and voltage losses for blend system. The results suggest that simultaneously reduced voltage loss and increased J_(sc) can be expected by further finely tuning the aggregation behavior of the ester-modified oligothiophene-based donor polymer.

关键词： Organic solar cells Polymers Ester-modified oligothiophene Fluorine Aggregation

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Boosting energy storage performance of low-temperature sputtered CaBi_(2)Nb_(2)O_(9) thin film capacitors via rapid thermal annealing

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Journal of advanced Ceramics 2021年第3期10卷 627-635页

作者： Jing YAN Yanling WANG Chun-Ming WANG Jun OUYANG Key Laboratory for Liquid–Solid Structural Evolution and Processing of Materials(Ministry of Education) School of Materials Science and EngineeringShandong UniversityJinan 250061China Institute of Advanced Energy Materials and Chemistry School of Chemistry and Chemical EngineeringShandong Provincial Key Laboratory of Molecular EngineeringQilu University of Technology(Shandong Academy of Sciences)Jinan 250353China College of Physics and Electronic Engineering Qilu Normal UniversityJinan 250013China Amperex Technology Limited Ningde 352100China School of Physics State Key Laboratory of Crystal MaterialsShandong UniversityJinan 250100China

CaBi_(2)Nb_(2)O_(9) thin film capacitors were fabricated on SrRuO_(3)-buffered Pt(111)/Ti/Si(100)substrates by adopting a two-step fabrication *** process combines a low-temperature sputtering deposition with a rapid thermal annealing(RTA)to inhibit the grain growth,for the purposes of delaying the polarization saturation and reducing the ferroelectric *** using this method,CaBi_(2)Nb_(2)O_(9) thin films with uniformly distributed nanograins were obtained,which display a large recyclable energy density Wrec≈69 J/cm^(3) and a high energy efficiencyη≈82.4%.A superior fatigue-resistance(negligible energy performance degradation after 10^(9) charge-discharge cycles)and a good thermal stability(from-170 to 150℃)have also been *** two-step method can be used to prepare other bismuth layer-structured ferroelectric film capacitors with enhanced energy storage performances.

关键词： bismuth layer-structured ferroelectrics(BLSFs) calcium bismuth niobate(CaBi_(2)Nb_(2)O_(9)) nanograin films rapid thermal annealing(RTA) energy storage fatigue-resistance

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Large Tunneling Magnetoresistance in Nonvolatile 2D Hybrid Spin Filters

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Physical Review Letters 2025年第7期134卷 077001-077001页

作者： Xiaoyu Wang Lihao Zhang Miao He Qi Li Wenqin Song Kunlin Yang Shuxi Wang Takashi Taniguchi Kenji Watanabe MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter Shaanxi Province Key Laboratory of Advanced Materials and Mesoscopic Physics School of Physics Xi’an Jiaotong University Xi’an 710049 China Anhui Key Laboratory of Low-Energy Quantum Materials and Devices High Magnetic Field Laboratory Hefei Institutes of Physical Science Chinese Academy of Sciences Hefei 230031 China Science Island Branch of Graduate School University of Science and Technology of China Hefei 230026 China Key Laboratory of Flexible Electronics and Institute of Advanced Materials Nanjing Tech University Nanjing 211816 China State Key Laboratory of Surface Physics and Institute for Nanoelectronic Devices and Quantum Computing Fudan University Shanghai 200433 China Research Center for Materials Nanoarchitectonics National Institute for Materials Science Tsukuba 305-0044 Japan Research Center for Electronic and Optical Materials National Institute for Materials Science Tsukuba 305-0044 Japan

Ferromagnetic semiconductors offer an efficient way to achieve high spin polarization via spin filtering effect. Large tunneling magnetoresistance (TMR) can then be realized when multiple spin filters are put in series, as recently demonstrated in van der Waals 2D A-type antiferromagnets such as CrI3 and CrSBr. However, the interlayer antiferromagnetic ground state of these magnets inherently results in a high resistance state at zero field, and this volatile behavior limits potential applications. Here we fabricate hybrid spin filters using 2D ferromagnetic metal Fe3GeTe2 and semiconductor CrBr3, which are nonvolatile as two magnets are magnetically decoupled. We achieve large TMR of around 100%, with its temperature dependence well fitted by the extended Jullière model. Additionally, the devices allow spin injection tuned through bias voltage, and TMR polarity reversals are observed. Our work opens a new route to develop 2D magnetic semiconductor based spintronics.

关键词： Van der Waals forces

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In-situ growth of MAX phase coatings on carbonised wood and their terahertz shielding properties

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Journal of advanced Ceramics 2021年第6期10卷 1291-1298页

作者： Jiaxuan HUANG Hujie WAN Mian LI Yiming ZHANG Jianfeng ZHU Xuelin LI Wenchao SHUI Yao LI Xiaomeng FAN Qiye WEN Xu XIAO Qing HUANG School of Shaanxi University of Science and Technology Xi’an 710021China Engineering Laboratory of Advanced Energy Materials Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China Qianwan Institute of CNiTECH Zhongchuangyi RoadHangzhou Bay DistrictNingbo 315336China School of Electronic Science and Engineering State Key Laboratory of Electronic Thin Film and Integrated DevicesUniversity of Electronic Science and Technology of ChinaChengdu 610054China State Key Laboratory of Solidification Processing School of Materials Science and EngineeringNorthwestern Poly technical UniversityXi’an 710072China

Electromagnetic interference(EMI)shielding materials have received considerable attention in recent *** EMI shielding effectiveness(SE)of materials depends on not only their composition but also their *** various microstructure prototypes,porous structures provide the advantages of low density and high terahertz wave *** this study,by using carbonised wood(CW)as a template,1-mm-thick MAX@CW composites(Ti2AlC@CW,V2A1C@CW,and Cr2AlC@CW)with a porous structure were fabricated through the molten salt *** MAX@CW composites led to the formation of a conductive network and multilayer interface,which resulted in improved EMI *** average EMI SE values of the three MAX@CW composites were>45 dB in the frequency of 0.6-1.6 *** the composites,V2A1C@CW exhibited the highest average EMI SE of 55 dB.

关键词： MAX phases biomimics electromagnetic interference(EMI) terahertz shielding

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Quantum dots assisted in vivo two-photon microscopy with NIR-Ⅱemission

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Photonics Research 2022年第1期10卷 189-196页

作者： HUWEI NI YALUN WANG TAO TANG WENBIN YU DONGYU LI MUBIN HE RUNZE CHEN MINGXI ZHANG JUN QIAN State Key Laboratory of Modern Optical Instrumentations Centre for Optical and Electromagnetic ResearchCollege of Optical Science and EngineeringInternational Research Center for Advanced PhotonicsZhejiang UniversityHangzhou 310058China SIEE(Sussex AI Institute) Zhejiang Gongshang UniversityHangzhou 310018China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Britton Chance Center for Biomedical Photonics Wuhan National Laboratory for OptoelectronicsHuazhong University of Science and TechnologyWuhan 430074China

With the advantages of high resolution and deep penetration depth,two-photon excited NIR-Ⅱ(900–1880 nm)fluorescence(2PF)microscopic bioimaging is ***,due to the lack of imaging systems and suitable probes,few such works,to our best knowledge,were demonstrated utilizing NIR-II excitation and NIR-Ⅱfluorescence ***,we used aqueously dispersible Pb S/Cd S quantum dots with bright NIR-II fluorescence as the contrast *** the excitation of a 1550 nm femtosecond(fs)laser,they emitted bright 2 PF in the NIR-Ⅱ***,a 2PF lifetime imaging microscopic(2PFLIM)system was implemented,and in vivo 2PFLIM images of mouse brain blood vessels were obtained for the first time to our best *** improve imaging speed,an in vivo two-photon fluorescence microscopy(2 PFM)system based on an In Ga As camera was implemented,and in vivo 2PFM images of QDs-stained mouse brain blood vessels were obtained.

关键词： excitation photon system

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