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High-Performance InTiZnO Thin-Film Transistors Deposited by Magnetron Sputtering

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Chinese Physics Letters 2013年第12期30卷 126-129页

作者： LIU Ao LIU Guo-Xia SHAN Fu-Kai ZHU Hui-Hui B.C.Shin W.J.lee C.R.Cho College of Physics Science Qingdao UniversityQingdao 266071 Lab of New Fiber Materials and Modern Textile Growing Base for State Key LaboratoryQingdao UniversityQingdao 266071 Electronic Ceramics Center DongEui UniversityBusan 614714South Korea College of Nanoscience and Nanotechnology Pusan National UniversityBusan 609735South Korea

InTiZnO thin-film transistors(ITZO TFTs)with Al_(2)O_(3)gate dielectrics are fabricated by magnetron sputtering at room *** bottom-gate-type ITZO TFTs with amorphous Al_(2)O_(3)gate dielectrics are operated in the enhancement mode and exhibit a mobility of 50.4 cm^(2)/V·s,threshold voltage of 1.2 V,subthreshold swing of 94.5 mV/decade,and on/off-current ratio of 7×10^(6).We believe that ITZO deposited at room temperature is an appropriate semiconductor material to produce high-mobility TFTs for developing flexible electronic devices.

关键词： temperature mobility film

Force-based and displacement-based reliability assessment approaches for highway bridges under multiple hazard actions

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Journal of Traffic and Transportation Engineering(English Edition) 2015年第4期2卷 223-232页

作者： Chao Huang Jerry J.Shen Mi Zhou George C.lee Department of Civil Structural and Environmental Engineering University at Buffalo Genex Systems/TFHRC 6300 Georgetown Pike Mc Lean 22101 USA National Engineering and Research Center for Highways in Mountain Area Key Laboratory for Old Bridge Detection and Reinforcement Technology of Ministry of Transportation Chang'an University

The strength limit state of American Association of State Highway and Transportation Officials （AASHTO） Load and Resistance Factor Design （LRFD） Bridge Design Spec/fications is developed based on the failure probabilities of the combination of non-extreme loads. The proposed design limit state equation （DLSE） has been fully calibrated for dead load and live load by using the reliability-based approach. On the other hand, most of DLSEs in other limit states, including the extreme events i and li, have not been developed and calibrated though taking certain probability-based concepts into account. This paper presents an assessment procedure of highway bridge reliabilities under the limit state of extreme event i, i. e,, the combination of dead load, live load and earthquake load. A force-based approach and a displacement-based approach are proposed and implemented on a set of nine simplL^ed bridge models. Results show that the displacement-based approach comes up with more convergent and accurate reliabilities for selected models, which can be applied to other hazards.

关键词： BridgeReliability assessmentMultiple hazardsLoadResistance

Vapor phase epitaxy of PbS single-crystal films on water-soluble substrates and application to photodetectors

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Nano Research 2022年第6期15卷 5402-5409页

作者： Yifan Wang Jing Xia Xuanze Li Fan Ru Xue Chen Ze Hua Ruiwen Shao Xuecong Wang Wenjun Zhang Chun-Sing lee Xiangmin Meng Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China Institute of Process Engineering Chinese Academy of SciencesBeijing 100190China Centre of Material Science and Optoelectronic Engineering University of Chinese Academy of SciencesBeijing 10049China Engineering Research Center for Semiconductor Integrated Technology Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China Analysis&Testing Center Beijing Institute of TechnologyBeijing 102488China Beijing Advanced Innovation Center for Intelligent Robots and Systems and Institute of Convergence in Medicine and Engineering Beijing Institute of TechnologyBeijing 100081China Center of Super-Diamond and Advanced Films(COSADF)and Department of Materials Science and Engineering City University of Hong KongHong KongChina Center of Super-Diamond and Advanced Films(COSDAF)and Department of Chemistry City University of Hong KongHong KongChina

Lead sulfide(PbS),a typical functional semiconductor material,has attracted serious attention due to its great potential in optoelectronics ***,controllable growth of PbS single-crystal film still remains a great ***,we report heteroepitaxial growth of large-scale highly crystalline PbS films on alkali salt(NaCl and KCl)substrates via chemical vapor deposition(CVD).Structural characterizations demonstrate that the as-grown PbS films exhibit an atomically sharp interface with the underlying *** epitaxial relationships between the epilayers and substrates were determined to be PbS(100)//NaCl(100)or KCl(100),PbS[010]//NaCl[010]or KCl[010].Owing to the high solubility of alkali salt,the epitaxial PbS films can be rapidly released from the underlying substrates and transferred to other substrates of interest while maintaining good integrity and crystallinity,the process of which is particularly attractive in the fields of electronics and ***,photodetectors based on the transferred PbS films were fabricated,exhibiting a high photoresponsivity of 7.5 A/W,a detectivity of 1.44×10^(12)Jones,and a rapid response time of approximately 0.25 *** work sheds light on the batch production,green transfer,and optoelectronic application of PbS films.

关键词： heteroepitaxial growth lead sulfide(PbS) single-crystal film photodetector transferable

爆轰波透射孔栅形成的高速爆燃波的结构和行为

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爆炸与冲击 2008年第2期28卷 97-104页

作者：朱雨建杨基明 J．H．S．lee 中国科学技术大学力学和机械工程系安徽合肥230027 Department of Mechanical Engineering McGill UniversityMontrealQuebecCA

以实验为主,研究光滑直管中乙炔氧气爆轰波透射孔栅形成的高速爆燃波结构和行为。实验以基于纹影平台的高速转鼓摄影记录孔栅下游近场内初始爆燃波的结构和发展,并以压力传感器跟踪其后继走向。研究发现,高速爆燃波是前驱激波和火焰的... 详细信息

以实验为主,研究光滑直管中乙炔氧气爆轰波透射孔栅形成的高速爆燃波结构和行为。实验以基于纹影平台的高速转鼓摄影记录孔栅下游近场内初始爆燃波的结构和发展,并以压力传感器跟踪其后继走向。研究发现,高速爆燃波是前驱激波和火焰的组合结构,随着初始压力的提升,它分别表现为紧随于前驱激波的层流和湍流燃烧火焰。入射爆轰胞格尺度小于或与孔栅扰动尺度相当时,湍流燃烧在下游近场迅速形成;层流结构的爆燃波通常无法抵制背景稀疏波而走向衰弱,而湍流燃烧结构可发生加速和向爆轰的转捩;他们之间存在一个不稳定的临界状态,高速爆燃波得以以0.5～0.6倍CJ爆轰速度传播较长距离,这一状态对应于双间断Rankine-Hugoniot关系的等容燃烧解。

关键词：爆炸力学高速爆燃纹影迹线爆轰爆燃转爆轰

270 nm ultra-thin self-adhesive conformable and long-term airstable complimentary organic transistors and amplifiers

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npj Flexible Electronics 2023年第1期7卷 165-176页

作者： Mohammad Javad Mirshojaeian Hosseini Yi Yang Walter Kruger Tomoyuki Yokota Sunghoon lee Takao Someya Robert A.Nawrocki School of Engineering Technology Purdue University401 S Grant StWest LafayetteIN 47906USA Department of Electrical Engineering and Information Systems School of EngineeringThe University of Tokyo7-3-1 Hongo Bunkyo-kuTokyo 113-8656Japan

Lightweight,flexible,and conformal bioelectronics are essential for wearable *** paper introduces 270 nm thin organic electronics amplifying circuits that are self-adhesive,skin conformal,and long-term *** report studies the effect of total device thickness,namely 3μm and 270 nm devices,on the characterization of organic devices before and after buckling,the longevity of organic field-effect transistors(OFETs)over 5 years,and the lamination of OFETs on the human skin.A single-stage organic complementary inverter and a pseudo-complementary amplifier are fabricated to compare their electrical characteristics,with amplification gains of 10 and 64,***,the study demonstrates a five-stage organic complementary inverter can successfully amplify artificial electromyogram and electrocardiogram signals with gains of 1000 and 1088,respectively.

关键词： transistors amplifier complementary

Removal performance,mechanisms,and influencing factors of biochar for air pollutants:a critical review

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Biochar 2022年第1期4卷 678-701页

作者： Zhipeng Zhao Bing Wang Benny K.G.Theng Xinqing lee Xueyang Zhang Miao Chen Peng Xu College of Resource and Environmental Engineering Guizhou UniversityGuiyang 550025China Key Laboratory of Karst Georesources and Environment Ministry of EducationGuiyang 550025China Manaaki Whenua-Landcare Research Palmerston NorthNew Zealand State Key Laboratory of Environmental Geochemistry Institute of GeochemistryChinese Academy of SciencesGuiyang 550081China Jiangsu Key Laboratory of Industrial Pollution Control and Resource Reuse School of Environmental EngineeringXuzhou University of TechnologyXuzhou 221018China

The emission of air pollutants from various industries is a major contributor to environmental *** removal of these pollutants before they are discharged into the environment has become an important means of controlling air *** has attracted increasing attention because of its low cost,high porosity,large specific surface area,abundant surface functional groups,and high removal *** physicochemical properties of biochar are greatly affected by feedstock types,preparation,and modification *** this reason,the capacity and propensity of biochar for removing air pollutants are rather *** understand the existing research status and grasp the latest research progress,a systematic review on the removal of different air pollutants by biochar is highly *** on the recent research,this paper systematically analyzes and summarizes the preparation and modification methods of biochar commonly used for the removal of six air pollutants(SO_(2),H_(2)S,CO_(2),Hg0,VOCs,and NH_(3)),as well as the removal performance and ***,the potential influencing factors(preparation parameters,physicochemical characteristics of biochar,and removal conditions)are ***,the regeneration of biochar,suggestions,and future perspectives are proposed.

关键词： Biochar Modification Air pollutants Removal performance Removal mechanisms Influencing factors

Reactive oxygen species-induced activation of Yes-associated protein-1 through the c-Myc pathway is a therapeutic target in hepatocellular carcinoma

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World Journal of Gastroenterology 2020年第42期26卷 6599-6613页

作者： Yuri Cho Min Ji Park Koeun Kim Sun Woong Kim Wonjin Kim Sooyeon Oh Joo Ho lee Department of Internal Medicine CHA Gangnam Medical CenterCHA University School of MedicineSeoul 06135South Korea Department of Internal Medicine Chaum Life CenterCHA University School of MedicineSeoul 06062South Korea Department of Internal Medicine CHA Bundang Medical CenterCHA University School of MedicineSeongnam 13496Bundang guSouth Korea

BACKGROUND The Hippo signaling pathway regulates organ size by regulating cell proliferation and apoptosis with terminal effectors including Yes-associated protein-1(YAP-1).Dysregulation in Hippo pathway has been proposed as one of the therapeutic targets in *** levels of reactive oxygen species(ROS)increase during the progression from early to advanced hepatocellular carcinoma(HCC).AIM To study the activation of YAP-1 by ROS-induced damage in HCC and the involved signaling *** The expression of YAP-1 in HCC cells(Huh-7,HepG2,and SNU-761)was quantified using real-time polymerase chain reaction and *** HCC cells were treated with H2O2,which is a major component of ROS in living organisms,and with either YAP-1 small interfering RNA(siRNA)or control *** investigate the role of YAP-1 in HCC cells under oxidative stress,MTS assays were *** was performed to evaluate the signaling pathway responsible for the activation of ***-eight surgically resected frozen HCC tissue samples and 88 nontumor liver tissue samples were used for gene expression *** H2O2 treatment increased the mRNA and protein expression of YAP-1 in HCC cells(Huh-7,HepG2,and SNU-761).Suppression of YAP-1 using siRNA transfection resulted in a significant decrease in tumor proliferation during H2O2 treatment both in vitro and in vivo(both P<0.05).The oncogenic action of YAP-1 occurred via the activation of the c-Myc pathway,leading to the upregulation of components of the unfolded protein response(UPR),including 78-kDa glucoseregulated protein and activating transcription factor-6(ATF-6).The YAP-1 mRNA levels in human HCC tissues were upregulated by 2.6-fold compared with those in nontumor tissues(P<0.05)and were positively correlated with the ATF-6 Levels(Pearson’s coefficient=0.299;P<0.05).CONCLUSION This study shows a novel connection between YAP-1 and the UPR through the c-Myc pathway during oxidative stress

关键词： Hepatocellular carcinoma Yes-associated protein-1 C-Myc Reactive oxygen species Unfolded protein response Activating transcription factor-6

Fabrication of Transparent Conducting Electrode Pattern by Metal Mesh Method on Stretchable Film Substrate

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Materials Sciences and Applications 2019年第5期10卷 393-405页

作者： Gun-Woo lee Dock Young lee Byung Chan lee Kyungha Baek Genggongwo Shi Jeseob Kim lee Soon Park Su Yong Nam Green Ind. Co. Ltd. Changwon South Korea ELK Corporation Daejeon South Korea Daegu Technopark Daegu South Korea School of Materials Science and Engineering Ulsan National Institute of Science and Technology (UNIST) Ulsan South Korea CCTech Inc. Hwaseong South Korea Department of Graphic Arts Information Engineering Pukyong National University Busan South Korea

Smart phones have become one of major electronic devices for human being. The easy and rapid exchange of information between man and machine is carried out by the touch screen panel (TSP) installed in the smart phones. Currently the smart phones are widely spread out while displays for automobiles are in the initial stage of developments. Since the automobile displays should fit the curved area of indoor space of the vehicle, the TSPs for automobiles need to be fabricated on the flexible and stretchable substrate film. In this study, we selected the thermo-plastic polyurethane film as the substrate film and examined the materials and process for fabrication of metal mesh type transparent conducting electrode films suitable for TSPs of automobile displays. The optimum UV resin system was established by the evaluation of various UV resin formulations in the UV imprinting process to make 3 × 3.5 μm trench patterns on the metal mesh type electrode film utilizing the embossed metal mask plate. The Ag paste has also been prepared by synthesis of Ag nanoparticles and formulation with the binder polymers. The inlay (filling) of Ag paste in the trench layer of transparent electrode film showed that the variation of electrical resistance was within 10% upon bending up to 100,000 times to radius of 3 mm.

关键词： Touch Screen Panel Silver Paste Stretchable Substrate Film UV Imprinting UV Resin Formulation

Passivating contact-based tunnel junction Si solar cells using machine learning for tandem cell applications

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Energy and AI 2023年第4期14卷 550-558页

作者： HyunJung Park Audrey Morisset Munho Kim Hae-Seok lee Aicha Hessler-Wyser Franz-Josef Haug Christophe Ballif Photovoltaics and Thin Film Electronics Laboratory(PV-Lab) EPFLSchool of Engineering(STI)Maladière 71bNeuchâtelCH-2000Switzerland School of Electrical and Electronic Engineering Nanyang Technological University50 Nanyang Avenue639798SingaporeSingapore Graduate School of Energy and Environment(KU-KIST Green School) Korea University145Anam-roSeongbuk-gu02841SeoulRepublic of Korea

Tandem solar cells are a key technology for exceeding the theoretical efficiency limit of single-junction *** of the most promising combinations is the silicon–perovskite tandem cells,considering their potential for high efficiency,fabrication on a large scale,and low *** most research focuses on improving each subcell,another key challenge lies in the tunnel junction that connects these subcells,significantly impacting the overall cell ***,we demonstrate the first use of tunnel junctions using a stack of p+/n+polysilicon passivating contacts deposited directly on the tunnel oxide to overcome the drawbacks of conventional metal oxide-based tunnel junctions,including low tunneling efficiency and sputter *** Random Forest analysis,we achieved high implied open circuit voltages over 700 mV and low contact resistivities of 500 mΩcm 2,suggesting fill factor losses of less than 1%abs for the operating conditions of a tandem cell.

关键词： Tunnel junction Tandem Passivating contact Solar cell Machine learning