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Chinese Physics B 2014年第9期23卷 154-160页

作者：彭超胡志远宁冰旭黄辉祥樊双张正选毕大炜恩云飞 State Key Laboratory of Functional materials for Informatics Shanghai Institute of Microsystem and Information TechnologyChinese Academy of Sciences Science and Technology on Reliability Physics and Application Technology of Electronic component Laboratory

we investigate the effects of 60^Co γ-ray irradiation on the 130 nm partially-depleted silicon-on-isolator （PDSOI） input/output （I/O） n-MOSFETs. A shallow trench isolation （STI） parasitic transistor is responsible for the observed hump in the back-gate transfer characteristic curve. The STI parasitic transistor, in which the trench oxide acts as the gate oxide, is sensitive to the radiation, and it introduces a new way to characterize the total ionizing dose （TID） responses in the STI oxide. A radiation enhanced drain induced barrier lower （DIBL） effect is observed in the STI parasitic transistor. It is manifested as the drain bias dependence of the radiation-induced off-state leakage and the increase of the DIBL parameter in the STI parasitic transistor after irradiation. Increasing the doping concentration in the whole body region or just near the STI sidewall can increase the threshold voltage of the STI parasitic transistor, and further reduce the radiation-induced off-state leakage. Moreover, we find that the radiation-induced trapped charge in the buried oxide leads to an obvious front-gate threshold voltage shift through the coupling effect. The high doping concentration in the body can effectively suppress the radiation-induced coupling effect.

关键词： partially depleted silicon-on-isolator n-MOSFET sidewall implant shallow trench isolation totalionizing dose

Effects of homogenization temperature on microstructure and mechanical properties of high-speed-extruded Mg–5Bi–3Al alloy

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Journal of Magnesium and Alloys 2022年第10期10卷 2833-2846页

作者： Jae Won Cha Sang-Cheol Jin Jae-Gil Jung Sung Hyuk Park School of materials Science and Engineering Kyungpook National University80 DaehakroDaegu 41566Republic of Korea Advanced Metals Division Korea Institute of Materials ScienceChangwon 51508Republic of Korea

This study investigates the effects of billet homogenization temperature on the dynamic recrystallization behavior during high-speed extrusion and resultant microstructure and tensile properties of the Mg–5Bi–3Al(BA53,wt%)*** billets homogenized at 350 and450℃(350H and 450H billets)are extruded at a high speed of 69 m/*** 350H billet has a relatively smaller grain size and a higher abundance of fine Mg3Bi2particles compared to the 450H *** extrusion of the 350H billet,enhanced dynamic recrystallization occurs as a result of its finer grains and abundance of particles,while the growth of recrystallized grains is suppressed by the grain-boundary pinning effect of ***,the extruded 350H material is characterized by smaller grains,relatively greater number of Mg3Bi2particles,and a higher internal strain energy than the extruded 450H *** tensile strength of the extruded 350H material is higher than that of the extruded 450H material owing to stronger grain-boundary hardening,particle hardening,and strain hardening *** extruded 350H material also exhibits a higher tensile elongation as its smaller grains inhibit the formation of crack-inducing undesirable twins during *** results from this study demonstrate that a decrease in the homogenization temperature from 450 to 350℃leads to improved strength and ductility in the high-speed-extruded BA53 material.

关键词： Mg–Bi–Al alloy High-speed extrusion Homogenization Dynamic recrystallization Tensile properties

Highly elastic energy storage device based on intrinsically super-stretchable polymer lithium-ion conductor with high conductivity

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Fundamental Research 2024年第1期4卷 140-146页

作者： Shi Wang Jixin He Qiange Li Yu Wang Chongyang Liu Tao Cheng Wen-Yong Lai State Key Laboratory of Organic Electronics and Information Displays(SKLOEID) Institute of Advanced Materials(IAM)School of Chemistry and Life SciencesNanjing University of Posts&Telecommunications9 Wenyuan RoadNanjing 210023China Frontiers Science Center for Flexible Electronics(FSCFE) MIIT Key Laboratory of Flexible Electronics(KLoFE)Northwestern Polytechnical UniversityXi'an 710072China

Stretchable power sources,especially stretchable lithium-ion batteries(LIBs),have attracted increasing attention due to their enormous prospects for powering flexible/wearable *** recent advances,it is still challenging to develop ultra-stretchable LIBs that can withstand large *** particular,stretchable LIBs require an elastic electrolyte as a basic component,while the conductivity of most elastic electrolytes drops sharply during deformation,especially during large *** is why highly stretchable LIBs have not yet been realized until *** a proof of concept,a super-stretchable LIB with strain up to 1200%is created based on an intrinsically super-stretchable polymer electrolyte as the lithium-ion *** super-stretchable conductive system is constructed by an effective diblock copolymerization strategy via photocuring of vinyl functionalized 2-ureido-4-pyrimidone(VFUpy),an acrylic monomer containing succinonitrile and a lithium salt,achieving high ionic conductivity(3.5×10^(-4)mS cm^(-1)at room temperature(RT))and large deformation(the strain can reach 4560%).The acrylic elastomer containing Li-ion conductive domains can strongly increase the compatibility between the neighboring elastic networks,resulting in high ionic conductivity under ultra-large deformation,while VFUpy increases elasticity modulus(over three times)and electrochemical stability(voltage window reaches 5.3 V)of the prepared polymer *** a strain of up to 1200%,the resulting stretchable LIBs are still sufficient to power *** study sheds light on the design and development of high-performance intrinsically super-stretchable materials for the advancement of highly elastic energy storage devices for powering flexible/wearable electronics that can endure large deformation.

关键词： Stretchable electronics Flexible electronics Flexible energy storage devices Stretchable lithium-ion conductors Flexible lithium-ion batteries

Manipulating Film Formation Kinetics Enables Organic Photovoltaic Cells with 19.5%Efficiency

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CCS Chemistry 2024年第1期6卷 218-229页

作者： Jianqiu Wang Pengqing Bi Yafei Wang Zhong Zheng Zhihao Chen Jiawei Qiao Wenxuan Wang Jiayao Li Cunbin An Shaoqing Zhang Xiaotao Hao Jianhui Hou State Key Laboratory of Polymer Physics and Chemistry Beijing National Laboratory for Molecular SciencesInstitute of ChemistryChinese Academy of SciencesBeijing 100190 University of Chinese Academy of Sciences Beijing 100049 School of Chemistry and Biological Engineering University of Science and Technology BeijingBeijing 100083 School of Physics State Key Laboratory of Crystal MaterialsShandong UniversityJinan 250100

Organic photovoltaic(OPV)cells have demonstrated remarkable performance in small,spin-coated *** significant challenges persist in the form of large efficiency losses due to the fact that the ideal morphology cannot be preserved in the transition of small-area cells to large-scale ***,the ternary strategy of incorporating the third component FTCC-Br into the active layer of PB2:BTP-eC9 is employed to improve absorption response,optimize morphology,and reduce charge recombination,leading to a power conversion efficiency(PCE)of 19.5%(certified as 19.1%by the National institute of Metrology,China).Moreover,the addition of FTCC-Br can control the aggregation kinetics of the active layer during the film formation process,transferring the optimal morphology to the blade-coated large-area *** on the highly efficient ternary bulk heterojunction,the 50 cm^(2) OPVmodules exhibited a PCE of 15.2%with respect to the active ***,the ternary OPV cells retain 80%of its initial PCE after 4000 h under continuous *** work demonstrates that the addition of a third component has the potential to improve the efficiency and stability of large-area organic solar cells.

关键词： organic photovoltaic cells morphology control large area cells ternary strategy power conventional efficiency

High-performance self-powered color filter-free blue photodetector based on wide-bandgap halide perovskites

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Journal of materials Science & Technology 2023年第21期152卷 100-108页

作者： Yeonghun Yun Hanbyeol Cho Jina Jung Sung Woong Yang Devthade Vidyasagar Rajendra Kumar Gunasekaran Sangwook Lee School of materials Science and Engineering Kyungpook National University(KNU)Daegu 41566South Korea KNU Advanced Material Research institute Kyungpook National UniversityDaegu 41566South Korea institute of Microstructure Technology&Light Technology institute Karlsruhe Institute of TechnologyKarlsruhe 76131Federal Republic of Germany

Blue photodetectors(PDs)are attracting great attention for various *** blue PDs based on inorganic GaP or InGaN absorbers are limited by their expensive,complex,and high-temperature fabrication *** absorber-based blue PDs still have much lower photode-tecting properties than inorganic blue *** this study,a high-performance self-powered blue PD is developed using methylammonium lead halide(MAPbX_(3);X=I,Br,and Cl)perovskites based on the eco-nomic and facile solution process at low *** composition is obtained through halide-composition *** best-performing device exhibits an average external quantum efficiency and an average detectivity of 42.7%and 8.65×10^(11) Jones,respectively,within the blue *** peak responsivity of the proposed PD is 0.174 A W^(−1) at 455 nm,which is comparable to that of commercial gallium phosphide blue PD(0.180 A W^(−1) at 470 nm).Moreover,the proposed device exhibits excellent environmental stability under ambient air *** findings will act as a basis for next-generation image sensor technologies,such as vertically stacked red/green/blue PDs.

关键词： Perovskites Photodetectors Blue Composition engineering Self-powered Wide bandgap

Electrophoretic deposition of a supercapacitor electrode of activated carbon onto an indium-tin-oxide substrate using ethyl cellulose as a binder

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Journal of materials Science & Technology 2020年第23期58卷 188-196页

作者： Taeuk Kim Seong-Hoon Yi Sang-Eun Chun School of materials Science and Engineering Kyungpook National UniversityDaegu 41566Republic of Korea

A transparent energy storage device is an essential component for transparent *** increasing demand for high-power devices stimulates the development of transparent supercapacitors with high power density.A transparent electrode for such supercapacitors can be assembled via the electrophoretic deposition of an active material powder with a binder onto a transparent *** properties of the binder critically influence the electrochemical behavior and performance of the resulting *** cellulose(EC)is known as an eco-friendly,transparent,flexible,and inexpensive ***,we fabricated an electrode film with EC binder via electrophoretic deposition on an indium tin oxide(ITO)substrate instead of using the conventional polytetrafluoroethylene(PTFE)*** assembled electrodes with EC and PTFE were compared to investigate the feasibility of EC as a binder from different perspectives,including homogeneity,wettability,electrochemical behavior,and mechanical *** EC enabled the formation of a homogeneous film composed of smaller particles and with a higher specific capacitance compared with films prepared with *** annealing improved the adhesion strength of the EC because of its glass transition;however,its hydrophobic nature limited utilization of the active material for charge *** electrochemical activation improved the wettability of the electrode,resulting in an increased capacitance of 60 F g^(-1).Furthermore,even with the lower wettability of EC compared with that of PTFE,better rate performance was possible with the EC *** increased mechanical stability after the annealing process ensured an excellent cycle life of 95%capacitance retention for 15,000 cycles.

关键词： Electrophoretic deposition Transparent electrode Activated carbon Ethyl cellulose Indium tin oxide

Fabrication of SiCw/Ti3SiC2 composites with improved thermal conductivity and mechanical properties using spark plasma sintering

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Journal of Advanced Ceramics 2020年第4期9卷 462-470页

作者： Xiaobing Zhou Lei Jing Yong Duk Kwon Jin-Young Kim Zhengren Huang Dang-Hyok Yoon Jaehyung Lee Qing Huang Engineering Laboratory of Advanced Energy materials Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo315201China School of materials Science and Engineering Yeungnam UniversityGyeongsan38541Republic of Korea Union materials Corporation Daegu42710Republic of Korea

High strength SiC whisker-reinforced Ti3SiC2 composites(SiCw/Ti3SiC2)with an improved thermal conductivity and mechanical properties were fabricated by spark plasma *** bending strength of 10 wt%SiCw/Ti3SiC2 was 635 MPa,which was approximately 50%higher than that of the monolithic Ti3SiC2(428 MPa).The Vickers hardness and thermal conductivity(k)also increased by 36%and 25%,respectively,from the monolithic Ti3SiC2 by the incorporation of 10 wt%*** remarkable improvement both in mechanical and thermal properties was attributed to the fine-grained uniform composite microstructure along with the effects of incorporated *** SiCw/Ti3SiC2 can be a feasible candidate for the in-core structural application in nuclear reactors due to the excellent mechanical and thermal properties.

关键词： SiC whisker Ti3SiC2 mechanical property thermal conductivity spark plasma sintering

A new strengthening mechanism driven by disruptive shear and solute segregation during warm rolling in 1.4 GPa class 12.5 wt% Al added-FeMnC ultra-lightweight steel

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Journal of materials Science & Technology 2023年第26期157卷 174-188页

作者： Chiwon Kim Hyun-Uk Hong Joonoh Moon Bong Ho Lee Seong-Jun Park Chang-Hoon Lee Department of materials Convergence and System Engineering Changwon National University 20 Changwondaehak-roChangwonGyeongnam 51140Republic of Korea Advanced Analysis Team Daegu Gyeongbuk Institute of Science and Technology 333 Technojungang-daeroDaegu42988Republic of Korea Ferrous Alloy Department Korea Institute of Materials Science 797 ChangwondaeroChangwonGyeongnam 51508Republic of Korea

Novel strengthening of Fe-29.1Mn-12.5Al-1.35C-4.95Cr steel achieved by warm rolling was *** solution-treated steel consisted of aγ-matrix containing nano-sizedκ-carbide((Fe,Mn)_(3) AlC)and elongated prior ferrite,which was transformed into FeAl-type B2 and Fe_(3) Al-type D0_(3) *** solution-treated steel exhibited poor strain hardening owing to glide softening associated withκ-carbide shearing by ***,after warm rolling with a reduction ratio of 30%at 300℃,the yield and tensile strengths significantly increased from 917 to 1300 MPa and 1025 to 1419 MPa,*** tensile test conducted at 300℃to simulate warm rolling exhibited serrated flows,indicating dy-namic strain aging(DSA).Atom probe tomography exhibited that the C atoms inκ-carbide were swept away along the slip direction by disruptive shear during rolling at 300℃.The swept C atoms along the slip direction interacted strongly with dislocations at 300℃,with repeated pinning and breakaway of dislocations from the C *** contributed to significant strengthening owing to the formation of a solute-rich atmosphere after warm *** results of the tensile tests at 300℃indicated that the de-gree of strengthening was proportional to the pre-strain *** strength of 1.4 GPa can be achieved with good ductility(17%elongation)by warm *** novel warm-rolling strengthening method ex-pedites the potential application of Fe-29.1Mn-12.5Al-1.35C-4.95Cr as a 1.4 GPa class ultra-lightweight steel.

关键词： FeMnAlC Cr addition κ-carbide Dynamic strain aging Strengthening

Meter-Scale Thin-Walled Structure with Lattice Infill for Fuel Tank Supporting component of Satellite:Multiscale Design and Experimental Verification

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工程与科学中的计算机建模(英文) 2024年第1期138卷 201-220页

作者： Xiaoyu Zhang Huizhong Zeng Shaohui Zhang Yan Zhang Mi Xiao Liping Liu Hao Zhou Hongyou Chai Liang Gao Beijing Key Laboratory of Lightweight Multi-Functional Composite materials and Structures Beijing Institute of TechnologyBeijing100081China Beijing Key Laboratory of Intelligent Space Robotic Systems Technology and Applications Beijing Institute of Spacecraft System EngineeringChina Academy of Space TechnologyBeijing100094China Key Laboratory of Metallurgical Equipment and Control Technology Ministry of EducationWuhan University of Science and TechnologyWuhan430081China State Key Laboratory of Digital Manufacturing Equipment and Technology Huazhong University of Science and TechnologyWuhan430074China

Lightweight thin-walled structures with lattice infill are widely desired in satellite for their high stiffness-to-weight ratio and superior buckling strength resulting fromthe sandwich *** structures can be fabricated bymetallic additive manufacturing technique,such as selective laser melting(SLM).However,the maximum dimensions of actual structures are usually in a sub-meter scale,which results in restrictions on their appliance in aerospace and other *** this work,a meter-scale thin-walled structure with lattice infill is designed for the fuel tank supporting component of the satellite by integrating a self-supporting lattice into the thickness optimization of the *** designed structure is fabricated by SLM of AlSi10Mg and cold metal transfer welding ***-static mechanical tests and vibration tests are both conducted to verify the mechanical strength of the designed large-scale lattice thin-walled *** experimental results indicate that themeter-scale thin-walled structure with lattice infill could meet the dimension and lightweight requirements of most spacecrafts.

关键词： Thin-walled structure lattice infill supporting component selective laser melting satellite

Photomediated core modification of diaryl dihydrophenzines through three-component alkylarylation of alkenes toward organocatalyzed ATRP

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Green Synthesis and Catalysis 2024年第1期5卷 35-41页

作者： Yajun Zhang Hao Wang Dandan Jiang Naixian Sun Wei He Lili Zhao Ning Qin Ning Zhu Zheng Fang Kai Guo College of Biotechnology and Pharmaceutical Engineering State Key Laboratory of Materials-Oriented Chemical EngineeringNanjing Tech UniversityNanjing211800China institute of Advanced Synthesis School of Chemistry and Molecular EngineeringNanjing Tech UniversityNanjing211800China Department of Mechanical Engineering The University of SheffieldSheffieldS13JDUnited Kingdom

The design and synthesis of a novel organic photocatalyst(OPC)have attracted broad interest from both the organic chemistry and polymer ***,we presented a visible-light-induced alkylarylation of alkenes strategy for core modification of 5,10-diaryl-5,10-dihydrophenazines(DADHPs)under metal-and additive-free conditions,with the aim to develop powerful photocatalyst for organocatalyzed atom transfer radical polymerization(O-ATRP).Good tolerance for a wide variety of functional groups and affording the corresponding tetrasubstituted products in moderate to good yields were achieved in the batch and flow *** experimental and computational mechanistic study confirmed that DADHPs’radical cations andπ-πstacking interactions played important roles in the alkylarylation of alkenes.A series of the tetrasubstituted DADHPs were directly synthesized from the corresponding noncore-modified phenazines,which were demonstrated to be effective organic photoredox catalysts for *** responsive nature,controlled polymerization manner,and welldefined poly(methyl methacrylate)were achieved via tetrasubstituted DADHPs mediated O-ATRP.

关键词： Photoinduced Core modification Diaryl dihydrophenzine O-ATRP