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基于双给体三元体异质结的高性能倍增型有机光电探测器

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光子学报 2024年第3期53卷 251-261页

作者：李尧王奋强王爱玲蓝俊刘虎刘良朋张鹏杰吴回州牛瑞霞张栩莹兰州交通大学电子与信息工程学院兰州730070

为了拓展光谱响应范围至近红外,采用双给体单受体的三元体异质结策略,基于溶液法制备了以ITO/PEDOT∶PSS/活性层/Al为基本结构的倍增型有机光电探测器,活性层由P3.T∶PTB7-Th∶IEICO-4F(100-x∶x∶1,wt/wt/wt)组成,研究了不同质量比的PT... 详细信息

为了拓展光谱响应范围至近红外,采用双给体单受体的三元体异质结策略,基于溶液法制备了以ITO/PEDOT∶PSS/活性层/Al为基本结构的倍增型有机光电探测器,活性层由P3.T∶PTB7-Th∶IEICO-4F(100-x∶x∶1,wt/wt/wt)组成,研究了不同质量比的PTB7-Th对器件光电特性的影响。优化后的三元倍增型有机光电探测器以P3.T∶PTB7-Th∶IEICO-4F(60∶40∶1,wt/wt/wt)为活性层,在-15 V偏压下,在450、520、655和850 nm处的外量子效率分别为2 666.40%、1 752.11%、1 894.26%和93..22%,响应度分别为965.80、73..3.、998.68和641.91 A/W,比探测率均超过10^(13.Jones,在850 nm处的响应度与比探测率分别是相同条件下二元器件P3.T∶IEICO-4F(100∶1,wt/wt)的2.23.和7.08倍。结果表明,在二元体系P3.T∶IEICO-4F中掺入适量的PTB7-Th,不仅能拓展光谱响应范围至近红外,还能改变活性层中激子解离界面、电子陷阱类型和空穴注入势垒高度,优化器件的电学性能。

关键词：倍增型有机光电探测器三元体异质结溶液法近红外激子解离

High dynamic adaptive mobility network model and performance analysis

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Science in china(Series F) 2008年第8期51卷 1154-1166页

作者： LIU Hui zhang jun school of Electronic and information engineering Beijing University of Aeronautics and AstronauticsBeijing 100083 China

Since mobile networks are not currently deployed on a large scale, research in this area is mostly by simulation. Among other simulation parameters, the mobility model plays a very important role in determining the protocol performance in MANET. Based on random direction mobility model, a high dynamic adaptive mobility network model is proposed in the paper. The algorithms and modeling are mainly studied and explained in detail. The technique keystone is that normal distribution is combined with uniform distribution and inertial feedback control is combined with kinematics, through the adaptive control on nodes speed and prediction tracking on nodes routes, an adaptive model is designed, which can be used in simulations to produce realistic and dynamic network scenarios. It is the adaptability that nodes mobile parameters can be adjusted randomly in threedimensional space. As a whole, colony mobility can show some rules. Such random movement processes as varied speed and dwells are simulated realistically. Such problems as sharp turns and urgent stops are smoothed well. The model can be adapted to not only common dynamic scenarios, but also high dynamic scenarios. Finally, the mobility model performance is analyzed and validated based on random dynamic scenarios simulations.

关键词： mobility model network node high dynamic adaptive control

A review of nonlinear piezoelectric energy harvesting interface circuits in discrete components

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Applied Mathematics and Mechanics(English Edition) 2022年第7期43卷 1001-1026页

作者： Bin zhang Hongsheng LIU Shengxi ZHOU jun GAO school of Mechanical Electrical and Information EngineeringShandong UniversityWeihai 264209Shandong ProvinceChina school of aeronautics Northwestern Polytechnical UniversityXi'an 710072China

Piezoelectric energy harvesting is considered as an ideal power resource for low-power consumption gadgets in vibrational *** energy extraction efficiency depends highly on the interface circuit,and should be highly improved to meet the power *** nonlinear interface circuits in discrete components have been extensively explored and developed with the advantages of easy implementation,stable operation,high efficiency,and low *** paper reviews the state-of-the-art progress of nonlinear piezoelectric energy harvesting interface circuits in discrete ***,the working principles and the advantages/disadvantages of four classical interface circuits are ***,the improved circuits based on the four typical circuits and other types of circuits are introduced in detail,and the advantages/disadvantages,output power,efficiency,energy consumption,and practicability of these circuits are ***,the future development trends of nonlinear piezoelectric energy harvesting circuits,e.g.,self-powered extraction,low-power consumption,and broadband characteristic,are predicted.

关键词： piezoelectric nonlinear energy harvesting discrete component interface circuit

Two-dimensional materials for future information technology: status and prospects

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Science china(information Sciences) 2024年第6期67卷 1-147页

作者： Hao QIU Zhihao YU Tiange ZHAO Qi zhang Mingsheng XU Peifeng LI Taotao LI Wenzhong BAO Yang CHAI Shula CHEN Yiqi CHEN Hui-Ming CHENG Daoxin DAI Zengfeng DI Zhuo DONG Xidong duAN Yuhan FENG Yu FU Jingshu GUO Pengwen GUO Yue HAO jun HE Xiao HE Jingyi HU Weida HU Zehua HU Xinyue HUANG Ziyang HUANG Ali IMRAN Ziqiang KONG Jia LI Qian LI Weisheng LI Lei LIAO Bilu LIU Can LIU Chunsen LIU Guanyu LIU Kaihui LIU Liwei LIU Sheng LIU Yuan LIU Donglin LU Likuan MA Feng MIAO Zhenhua NI Jing NING Anlian PAN Tian-Ling REN Haowen SHU Litao SUN Yue SUN Quanyang TAO Zi-Ao TIAN Dong WANG Hao WANG Haomin WANG Jialong WANG junyong WANG Wenhui WANG Xingjun WANG Yeliang WANG Yuwei WANG Zhenyu WANG Yao WE... school of Electronic Science and engineering Nanjing University school of Integrated Circuits Interdisciplinary Research Center for Future Intelligent Chips (Chip-X)Nanjing University school of Integrated Circuit Science and engineering Nanjing University of Posts and Telecommunications State Key Laboratory of Infrared Physics Shanghai Institute of Technical Physics Chinese Academy of Sciences school of Physics and Key Lab of Quantum Materials and Devices of the Ministry of Education School of Electronic Science & EngineeringSoutheast University College of Integrated Circuits State Key Laboratory of Silicon and Advanced Semiconductor MaterialsZhejiang University Suzhou Laboratory State Key Laboratory of Integrated Chips and Systems School of MicroelectronicsFudan University Shaoxin Laboratory Department of Applied Physics The Hong Kong Polytechnic University Key Laboratory for Micro-Nano Physics and Technology of Hunan Province College of Materials Science and EngineeringHunan University College of Integrated Circuits Zhejiang University Shenzhen Geim Graphene Center Shenzhen Key Laboratory of Layered Materials for Value-Added ApplicationsTsinghua-Berkeley Shenzhen Institute & Institute of Materials ResearchTsinghua Shenzhen International Graduate SchoolTsinghua University State Key Laboratory of Extreme Photonics and Instrumentation College of Optical Science and EngineeringInternational Research Center for Advanced PhotonicsZijingang CampusZhejiang University National Key Laboratory of Materials for Integrated Circuits Shanghai Institute of Microsystem and Information TechnologyChinese Academy of Sciences CAS Key Laboratory of Nanophotonic Materials and Devices & Key Laboratory of Nanodevices and Applications i-LabSuzhou Institute of Nano-Tech and Nano-Bionics (SINANO)Chinese Academy of Sciences College of Chemistry and Chemical engineering Hunan University Key Laboratory of Quantum State Construction and Manipulation (Ministry of Education) Department of PhysicsRenmin University of China school

Over the past 70 years, the semiconductor industry has undergone transformative changes,largely driven by the miniaturization of devices and the integration of innovative structures and materials. Two-dimensional(2D) materials like transition metal dichalcogenides(TMDs) and graphene are pivotal in overcoming the limitations of silicon-based technologies, offering innovative approaches in transistor design and functionality, enabling atomic-thin channel transistors and monolithic 3. integration. We review the important progress in the application of 2D materials in future information technology, focusing in particular on micro{3. and opto{3.. We comprehensively summarize the key advancements across material production, characterization metrology, electronic devices, optoelectronic devices, and heterogeneous integration on silicon. A strategic roadmap and key challenges for the transition of 2D materials from basic research to industrial development are outlined. To facilitate such a transition, key technologies and tools dedicated to 2D materials must be developed to meet industrial standards, and the employment of AI in material growth, characterizations, and circuit design will be essential. It is time for academia to actively engage with industry to drive the next 10 years of 2D material research.

关键词： two-dimensional (2D) materials information technology production technology standardization of characterization microelectronic devices optoelectronic devices multi-functional integration

Unsupervised, Supervised and Semi-supervised Dimensionality Reduction by Low-Rank Regression Analysis

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Chinese Journal of electronics 2021年第4期30卷 603-610页

作者： TANG Kewei zhang jun zhang Changsheng WANG Lijun ZHAI Yun JIANG Wei school of Mathematics Liaoning Normal University College of Computer Science and Artificial Intelligence Wenzhou University Research Center for information Science Theory and Methodology Institute of Scientific and Technical Information of China E-Government Research Center Chinese Academy of Governance

Techniques for dimensionality reduction have attracted much attention in computer vision and pattern recognition. However, for the supervised or unsupervised case, the methods combining regression analysis and spectral graph analysis do not consider the global structure of the subspace; For semi-supervised case,how to use the unlabeled samples more effectively is still an open problem. In this paper, we propose the methods by Low-rank regression analysis(LRRA) to deal with these problems. For supervised or unsupervised dimensionality reduction, combining spectral graph analysis and LRRA can make a global constraint on the subspace. For semi-supervised dimensionality reduction, the proposed method incorporating LRRA can exploit the unlabeled samples more effectively. The experimental results show the effectiveness of our methods.

关键词： Dimensionality reduction Low-rank Supervised Unsupervised Semi-supervised

Fast Algorithm for Inverse Two-Dimensional S Transform and Its Application in Time-Frequency Filtering for SAR Image Despeckling

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Chinese Journal of electronics 2016年第1期25卷 100-105页

作者： GAO Fei zhang Ye WANG jun SUN Jinping school of Electronic and information engineering Beihang University

S transform is a time-frequency representation which has been applied in various fields, yet suffers the problem of time and resource consumption. In order to overcome this problem and facilitate its application in image analysis, we introduce a fast algorithm for inverse twodimensional S transform. A two-dimensional S transform time-frequency filter for Synthetic aperture radar(SAR)image despeckling is proposed on the basis of this fast algorithm. Synthetic and actual SAR images are both used to quantitatively evaluate its performance. The proposed algorithm is compared with several classical algorithms with better results both in speckle noise reduction and detail preservation.

关键词： Time-frequency representation Fast al gorithm Two-dimensional S transform Time-frequency filter Synthetic aperture radar(SAR) image Speckle noise reduction

IDMA based MAI mitigation scheme with low complexity and low latency

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Journal of Systems engineering and electronics 2012年第6期23卷 791-801页

作者： Zuoliang Yin Xingpeng Mao jun Cai Naitong zhang school of electronics and information {3. Harbin Institute of Technology Harbin 150001 R R. China Department of Computer and Electrical engineering University of Manitoba Winnipeg R3T 5V6 Canada

High complexity and high latency are key problems for multiuser detection （MUD） to be applied to a mobile station in cellular networks. To tackle these problems, an interleave division multiple access （IDMA） based multiple access scheme, grouped spread IDMA （GSIDMA）, is proposed. In a GSIDMA system, lower complexity and latency for mobile stations can be achieved by appropriately dividing active users into different groups. The system model of GSIDMA is constructed and followed by analysing on its system capacity, complexity and latency, and bit error rate （BER） performance. The extrinsic information transfer （EXIT） chart is used to analyze the convergence behavior of the iteration process. The grouping method and interleavers-reuse issue for GSIDMA are also discussed preliminarily. The analyses and simulation results indicate that the complexity and latency of the proposed scheme are much lower than those of IDMA, whereas its BER performance is close to the latter. The properties of low complexity and low latency make it more feasible for the practical implementation.

关键词： grouped spread interleave division multiple access(GSIDMA) iterative multiuser detector (IMUD) low complexity lowlatency multiple access interference (MAI) mitigation.

硅酸镓镧、钽酸镓镧和铌酸镓镧的声表面波传播特性

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上海交通大学学报 2004年第1期38卷 116-119页

作者：张国伟韩韬吉小军施文康上海交通大学电子信息学院上海200030

计算了硅酸镓镧、钽酸镓镧和铌酸镓镧的不同切向和传播方向的声表面波(SAW)传播特性,并对其和石英晶体上相应切向和传播方向的SAW传播特性做了对比分析.计算结果表明,这3.材料的SAW传播速度一般比石英低1km/s左右;和石英一样,具有零温... 详细信息

计算了硅酸镓镧、钽酸镓镧和铌酸镓镧的不同切向和传播方向的声表面波(SAW)传播特性,并对其和石英晶体上相应切向和传播方向的SAW传播特性做了对比分析.计算结果表明,这3.材料的SAW传播速度一般比石英低1km/s左右;和石英一样,具有零温度切向和纯模方向;机电耦合系数k2却远高于石英,其中钽酸镓镧的k2最大.对不同材料常数进行了对比计算,结果表明,不同材料常数的SAW传播特性有明显的差异,其中以频率温度系数差异最大.

关键词：硅酸镓镧钽酸镓镧铌酸镓镧声表面波传播特性

Secrecy Rate Analysis for Reconfigurable Intelligent Surface-Assisted MIMO Communications with Statistical CSI

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china Communications 2021年第3期18卷 52-62页

作者： Jie Liu jun zhang Qi zhang Jue Wang Xinghua Sun Jiangsu Key Laboratory of Wireless Communications Nanjing University of Posts and TelecommunicationsNanjing 210003China engineering Research Center of Health Service System Based on Ubiquitous Wireless Networks Ministry of EducationNanjing University of Posts and TelecommunicationsNanjing 210003China school of information Science and Technology Nantong UniversityNantong 226019China Research Center of Networks and Communications Peng Cheng LaboratoryShenzhen 518066China school of electronics and Communication engineering Sun Yat-sen UniversityGuangzhou 510006China

In this paper,a reconfigurable intelligent surface(RIS)-assisted MIMO wireless secure communication system is considered,in which a base station(BS)equipped with multiple antennas exploits statistical channel state information to communicate with a legitimate multi-antenna user,in the presence of an eavesdropper,also equipped with multiple *** firstly obtain an analytical expression of the ergodic secrecy rate based on the results of largedimensional random matrix ***,a jointly alternating optimization algorithm with the method of Taylor series expansion and the projected gradient ascent method is proposed to design the transmit covariance matrix at the BS,as well as the diagonal phaseshifting matrix to maximize the ergodic secrecy *** are conducted to demonstrate the accuracy of the derived analytical expressions,as well as the superior performance of our proposed algorithm.

关键词： reconfigurable intelligent surface ergodic secrecy rate statistical CSI alternating optimization algorithm