检索结果-内蒙古大学图书馆

SSRN 2022年

作者： Li, Cong Li, Huan Zhu, Zhinan Yin, Tong Wang, Zhenni Li, Peipei Zeng, Chengxin Yang, Fu Zhong, Peng Cui, Nuanyang Shou, Chunhui School of Advanced Materials and Nanotechnology Xidian University Xi’an710126 China Maritime Silkroad Knowledge Center China-Singapore Guangzhou Knowledge City Huangpu District Building B5 Guangzhou China Laboratory of Advanced Optoelectronic Materials College of Chemistry Chemical Engineering and Materials Science Soochow University Jiangsu Suzhou215123 China Key Laboratory of Solar Energy Utilization & Energy Saving Technology of Zhejiang Province Zhejiang Provincial Energy Group R&D Institute Co. Ltd. Hangzhou311121 China

The potential loss caused by defects is one of the most important factors affecting the performance of perovskite photovoltaic devices. CdS/ZnS quantum dots (QDs) have good hydrophobicity and can achieve the dual effects of waterproofing hydrophobic and defect passivation of perovskite films. The Lowest Unoccupied Molecular Orbital (LUMO) energy level of CdS/ZnS QDs doped perovskite film decreases from -3.75 eV to -3.85 eV. The barrier of photo-generated charge transport from the perovskite layer to the electron transport layer is significantly reduced, which is conducive to the enhancement of built-in potential. The density of trap states is reduced and the non-radiative recombination of carriers is suppressed. CdS/ZnS QDs doped perovskite film is dense and has a larger roughness, which helps to increase the contact area with the electron transport layer, thereby improving the charge transportation. Finally, the highest efficiency of the device with QDs reaches 21.42%, and the open-circuit voltage ( V oc ) and the short-circuit current density ( J sc ) are significantly increased compared with undoped ones. The hydrophobicity and stability of the device have also been improved. Therefore, the effect of CdS/ZnS QDs on passivation may provide new ideas for the efficient and stable perovskite solar cells. © 2022, The Authors. All rights reserved.

关键词： Cadmium sulfide

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Recent developments of quantum dot based micro-LED based on non-radiative energy transfer mechanism

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Opto-Electronic Advances 2021年第4期4卷 1-15页

作者： Xiaotong Fan Tingzhu Wu Bin Liu Rong Zhang Hao-Chung Kuo Zhong Chen School of Electronic Science and Engineering Fujian Engineering Research Center for Solid-State LightingXiamen UniversityXiamen 361005China Fujian Science&Technology Innovation Laboratory for Energy Materials of China Xiamen 361005China Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials Nanjing National Laboratory of MicrostructuresSchool of Electronic Science and EngineeringNanjing UniversityNanjing 210093China Department of Photonics and Graduate Institute of Electro-Optical Engineering College of Electrical and Computer EngineeringChiao Tung UniversityHsinchu 30010China

With regard to micro-light-emitting diodes(micro-LEDs),their excellent brightness,low energy consumption,and ultrahigh resolution are significant ***,the large size of traditional inorganic phosphors and the number of side defects have restricted the practical applications of small sized ***,quantum dot(QD)and nonradiative energy transfer(NRET)have been proposed to solve existing *** possess nanoscale dimensions and high luminous efficiency,and they are suitable for NRET because they are able to nearly contact the micro-LED *** NRET between QDs and micro-LED chip further improves the color conversion efficiency(CCE)and effective quantum yield(EQY)of full-color micro-LED *** this review,we discuss the NRET mechanism for QD micro-LED devices,and then nano-pillar LED,nano-hole LED,and nano-ring LED are introduced in *** structures are beneficial to the NRET between QD and micro-LED,especially nano-ring ***,the challenges and future envisions have also been described.

关键词： quantum dot based micro-LED non-radiative energy transfer atomic layer deposition sidewall defects

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Dynamic Modeling Method of Spatial Passive Over-constrained Parallel Mechanism Based on Newton Euler Method

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Jixie Gongcheng Xuebao/Journal of Mechanical Engineering 2020年第11期56卷 48-57页

作者： Li, Yongquan Guo, Yu Zhang, Yang Zhang, Lijie Parallel Robot and Mechatronic System Laboratory of Hebei Province Yanshan University Qinhuangdao066004 China Key Laboratory of Advanced Forging & Stamping Technology and Science Yanshan University Ministry of Education of China Qinhuangdao066004 China Hebei Provincial Key Laboratory of Heavy Machinery Fluid Power Transmission and Control Yanshan University Qinhuangdao066004 China

The 4-RPTR four-degree-of-freedom space passive over-constrained (redundant constrained) parallel mechanism is taken as the research object, and the Newton Euler method combined with the complementary deformation coordination equation is used to analyze the dynamics. The number of dynamic equations based on Newton's Euler method is 78, but due to the existence of passive over-constraints of the mechanism, the unknown variables of the required solutions are 80. When the eight deformation coordination equations are added according to the method of planar over-constrained mechanism, it will be linearly related to the 78 equations built, resulting in the equations being unable to solve. Based on this, when proposing the dynamics modeling of passive over-constrained parallel mechanism, the reason for the passive over-constraint of the mechanism should be analyzed firstly. On this basis, adding the deformation of the member caused by the redundant constrained force (torque) and the position and posture error of the terminal platform as a complementary equation ensures that the equations are linearly independent and can be solved. To this end, the relationship between the deformation of the rod and the position and posture error of the terminal platform caused by the rotational joint restraining torque directly causing the redundant constraint is introduced, and eight deformation coordination equations are added, and six unknown variables are introduced, thereby obtaining 86 equations. Containing 86 unknowns, and the equations are linearly independent, the dynamic solution model of the mechanism is obtained. Based on matlab and adams software, the dynamics simulation of the mechanism is carried out. When the same motion trajectory is given at the terminal of the platform, the correctness of the dynamic model can be seen by comparing the driving force variation curves of the two methods. It provides a new idea for dynamic modeling of this type of space passive over-constrai

关键词： Dynamics

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Cytochrome-mediated direct electron uptake from metallic iron by Methanosarcina acetivorans

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mLife 2022年第4期1卷 443-447页

作者： Dawn E.Holmes Haiyan Tang Trevor Woodard Dandan Liang Jinjie Zhou Xinying Liu Derek R.Lovley Department of Microbiology University of Massachusetts-AmherstAmherstMassachusettsUSA Department of Physical and Biological Science Western New England UniversitySpringfieldMassachusettsUSA Jiangsu Provincial Key Lab of Solid Organic Waste Utilization Jiangsu Collaborative Innovation Center of Solid Organic WastesEducational Ministry Engineering Center of Resource-saving FertilizersNanjing Agricultural UniversityNanjingChina State Key Laboratory of Urban Water Resource and Environment School of EnvironmentHarbin Institute of TechnologyHarbinChina Institute for Advanced Study Shenzhen UniversityShenzhenGuangdongChina College of Environmental Science and Engineering Beijing Forestry UniversityBeijingChina

Impact statement Methane-producing microorganisms accelerate the corrosion of iron-containing *** studies have inferred that some methanogens might directly accept electrons from Fe(0),but when this possibility was more intensively investigated,H2 was shown to be an intermediary electron carrier between Fe(0)and ***,we report that Methanosarcina acetivorans catalyzes direct metal-to-microbe electron transfer to support methane *** of the gene for the multiheme,outer-surface c-type cytochrome MmcA eliminated methane production from Fe(0),consistent with the key role of MmcA in other forms of extracellular electron *** findings,coupled with the previous demonstration that outer-surface c-type cytochromes are also electrical contacts for electron uptake from Fe(0)by Geobacter and Shewanella species,suggest that the presence of multiheme c-type cytochromes on corrosion surfaces might be diagnostic for direct metal-to-microbe electron transfer and that interfering with cytochrome function might be a strategy to mitigate corrosion.

关键词： corrosion electron outer

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Cross-receptive Focused Inference Network for Lightweight Image Super-Resolution

arXiv

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arXiv 2022年

作者： Li, Wenjie Li, Juncheng Gao, Guangwei Deng, Weihong Zhou, Jiantao Yang, Jian Qi, Guo-Jun The Intelligent Visual Information Perception Laboratory Institute of Advanced Technology Nanjing University of Posts and Telecommunications Nanjing210046 China The Provincial Key Laboratory for Computer Information Processing Technology Soochow University Suzhou215006 China The School of Communication and Information Engineering Shanghai University Shanghai200444 China Jiangsu Key Laboratory of Image and Video Understanding for Social Safety Nanjing University of Science and Technology Nanjing210094 China The Pattern Recognition and Intelligent System Laboratory School of Artificial Intelligence Beijing University of Posts and Telecommunications Beijing100876 China The State Key Laboratory of Internet of Things for Smart City Department of Computer and Information Science Faculty of Science and Technology University of Macau 999078 China The School of Computer Science and Technology Nanjing University of Science and Technology Nanjing210094 China The Research Center for Industries of the Future The School of Engineering Westlake University Hangzhou310024 China OPPO Research SeattleWA98101 United States

Recently, Transformer-based methods have shown impressive performance in single image super-resolution (SISR) tasks due to the ability of global feature extraction. However, the capabilities of Transformers that need to incorporate contextual information to extract features dynamically are neglected. To address this issue, we propose a lightweight Cross-receptive Focused Inference Network (CFIN) that consists of a cascade of CT Blocks mixed with CNN and Transformer. Specifically, in the CT block, we first propose a CNN-based Cross-Scale Information Aggregation Module (CIAM) to enable the model to better focus on potentially helpful information to improve the efficiency of the Transformer phase. Then, we design a novel Cross-receptive Field Guided Transformer (CFGT) to enable the selection of contextual information required for reconstruction by using a modulated convolutional kernel that understands the current semantic information and exploits the information interaction within different self-attention. Extensive experiments have shown that our proposed CFIN can effectively reconstruct images using contextual information, and it can strike a good balance between computational cost and model performance as an efficient model. Source codes will be available at https://***/IVIPLab/CFIN. Copyright © 2022, The Authors. All rights reserved.

关键词： Semantics

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Review on polishing of atomic-level surfaces for potassium dihydrogen phosphate

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Tribology International 2024年 198卷

作者： Meng, Fanning Zhang, Zhenyu Zeng, Zinuo Fan, Cheng Gu, Yang Gao, Fei Luo, Hao Wang, Jianmei Li, Guo School of Mechanical Engineering Hangzhou Dianzi University Hangzhou 310018 China State Key Laboratory of High-performance Precision Manufacturing Dalian University of Technology Dalian 116024 China College of Management Science Chengdu University of Technology Chengdu 610059 China Jiangsu Provincial Key Laboratory of Advanced Robotics School of Mechanical and Electrical Engineering Soochow University Suzhou 215021 China Institute of Development for Science and Technology Hainan University Haikou 570228 China Department of Mechanical Engineering Tsinghua University Beijing 100084 China Luoyang Bearing Research Institute Co. Ltd Luoyang 471039 China Baoshan Longi Silicon Material Co. Ltd Baoshan 678315 China School of Mechanical Engineering Taiyuan University of Science and Technology Taiyuan 030024 China Research Center of Laser Fusion China Academy of Engineering Physics Mianyang 621900 China

Potassium dihydrogen phosphate (KDP) is a key material for inertial confinement fusion and nonlinear optic devices. However, KDP is soft-brittle, deliquescent and temperature-sensitive, making it become a difficult-to-process crystal. Even that, high-performance devices of KDP strictly require atomic-level surfaces, rising a challenge for ultra-precision machining. Due to the nature of deliquescence of KDP, traditional polishing methods are disabled to machine it. As a result, it is significant to summarize advanced polishing methods to achieving atomic-level surfaces of KDP. This review presents the fluid jet polishing, deliquescent polishing and chemical mechanical polishing (CMP) for KDP. It indicates that CMP with rare earth could obtain atomic-level surfaces and the lowest subsurface damages. Finally, future polishing directions on KDP are proposed and discussed. © 2024 Elsevier Ltd

关键词： Atomic surface Atomic-level polishing Chemical mechanical polishing KDP

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Highly stable and repeatable femtosecond soliton pulse generation from saturable absorbers based on twodimensional Cu3-xP nanocrystals

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Frontiers of Optoelectronics 2020年第2期13卷 139-148页

作者： Haoran MU Zeke LIU Xiaozhi BAO Zhichen WAN Guanyu LIU Xiangping LI Huaiyu SHAO Guichuan XING Babar SHABBIR Lei LI Tian SUN Shaojuan LI Wanli MA Qiaoliang BAO Department of Materials Science and Engineering and ARC Centre of Excellence in Future Low-Energy Electronics Technologies(FLEET) Monash UniversityClaytonVictoria 3800Australia Institute of Functional Nano and Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devicesand Collaborative Innovation Center of Suzhou Nano Science and TechnologySoochow UniversitySuzhou 215123China Joint Key Laboratory of the Ministry of Education Institute of Applied Physics and Materials Engineering(IAPME)University of MacaoMacaoChina Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications Institute of Photonics TechnologyJinan UniversityGuangzhou 510632China Jiangsu Key Laboratory of Advanced Laser Materials and Devices Jiangsu Collaborative Innovation Center of Advanced Laser Technology and Emerging IndustrySchool of Physics and Electronic EngineeringJiangsu Normal UniversityXuzhou 221116China

Heavily doped colloidal plasmonic nanocrystals have attracted great attention because of their lower and adjustable free carrier densities and tunable localized surface plasmonic resonance bands in the spectral range from near-infra to mid-infra *** its plasmon-enhanced optical nonlinearity,this new family of plasmonic materials shows a huge potential for nonlinear optical applications,such as ultrafast switching,nonlinear sensing,and pulse laser ***3-xP nanocrystals were previously shown to have a strong saturable absorption at the plasmonic resonance,which enabled high-energy Q-switched fiber lasers with 6.1μs pulse *** work demonstrates that both high-quality mode-locked and Q-switched pulses at 1560 nm can be generated by evanescently incorporating two-dimensional(2D)Cu3-xP nanocrystals onto a D-shaped optical fiber as an effective saturable *** 3 dB bandwidth of the mode-locking optical spectrum is as broad as 7.3 nm,and the corresponding pulse duration can reach 423 *** repetition rate of the Q-switching pulses is higher than 80 ***,the largest pulse energy is more than 120μ*** that laser characteristics are highly stable and repeatable based on the results of over 20 *** work may trigger further investigations on heavily doped plasmonic 2D nanocrystals as a next-generation,inexpensive,and solution-processed element for fascinating photonics and optoelectronics applications.

关键词： plasmonic semiconductors fiber laser modelocking ultrafast generation

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Visualizing Field-Effects and Chemical Passivation in Efficient 2D/3D Heterojunction Perovskite Solar Cells and Modules

SSRN

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SSRN 2023年

作者： Yang, Weichuang Ding, Bin Lin, Zedong Sun, Jingsong Meng, YuanYuan Sheng, Jiang Ding, Yong Yang, Zhenhai Ye, Jichun Dyson, Paul J. Nazeeruddin, Mohammad Khaja Ningbo China Sion Switzerland State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University Beijing China Guangdong Provincial Key Lab of Nano-Micro Materials Research School of Chemical Biology and Biotechnology Shenzhen Graduate School Peking University Shenzhen China School of Optoelectronic Science and Engineering Collaborative Innovation Center of Suzhou Nano Science and Technology Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province & Key Lab of Modern Optical Technologies of Education Ministry of China Soochow University Suzhou China University of Chinese Academy of Sciences Beijing China Zhejiang Energy Group R&D 152 Tianmushan Road Xihu District Hangzhou City310003 China

The full potential of perovskite solar cells (PSCs) is limited by charge-carrier recombination, due to the imperfect passivation methods. Here, interfacial recombination loss of field-effect and chemical passivation mechanisms is quantified. It was found that a favorable alignment of energy levels can provide very good field-effects to reduce minority carriers, and suppresses interfacial recombination losses more effectively than chemical passivation. To obtain high-efficiency PSCs, two-dimensional (2D) perovskites are promising candidates, which offer powerful field-effects and only require modest chemical passivation at the interface. Owing to promoted passivation and charge-carrier extraction, the power conversion efficiency of a 2D/3D heterojunction PSC was boosted to 25.32% (certified 25.04%) for small-size devices and to 21.48% for a large-area module (with a designated area of 29.0 cm2). Ion migration is also suppressed by the 2D/3D heterojunction so that the unencapsulated small-size devices maintain 90% of the initial efficiency after 2000 h of continuous operation at the maximum power point. © 2023, The Authors. All rights reserved.

关键词： Conversion efficiency

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Vascular small fiber neuropathy in neuronal intranuclear inclusion disease

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Alzheimer's & dementia : the journal of the Alzheimer's Association 2025年第6期21卷 e70350页

作者： Yihang Han Yanjuan Wang Yujia Cao Jian Xie Yunnan Lu Huixia Lin Di Wu Zhijun Zhang Department of Neurology in Affiliated ZhongDa Hospital and Jiangsu Provincial Medical Key Discipline School of Medicine Institution of Neuropsychiatry Key Laboratory of Developmental Genes and Human Disease Southeast University Nanjing Jiangsu China. Department of Neurology Xishan People's Hospital of Wuxi City Wuxi Jiangsu China. Department of Neurology The Affiliated Brain Hospital of Nanjing Medical University Nanjing Jiangsu China. Shenzhen Key Laboratory of Precision Diagnosis and Treatment of Depression Department of Mental Health and Public Health Faculty of Life and Health Sciences of Shenzhen University of Advanced Technology The Brain Cognition and Brain Disease Institute of Shenzhen Institute of Advanced Technology Chinese Academy of Sciences Shenzhen Guangdong China.

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Low-threshold lasing in a plasmonic laser using nanoplate InGaN/GaN

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Journal of Semiconductors 2021年第12期42卷 52-56页

作者： Ting Zhi Tao Tao Xiaoyan Liu Junjun Xue Jin Wang Zhikuo Tao Yi Li Zili Xie Bin Liu College of Electronic and Optical Engineering Nanjing University of Posts and TelecommunicationsNanjing 210023China College of Microelectronics Nanjing University of Posts and TelecommunicationsNanjing 210023China Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials School of Electronic Science and EngineeringNanjing UniversityNanjing 210093China Nanjing National Laboratory of Microstructures Nanjing UniversityNanjing 210093China School of Information Science and Technology Nantong UniversityNantong 226019China Tongke School of Microelectronics Nantong UniversityNantong 226019China

Plasmonic nanolaser as a new type of ultra-small laser,has gain wide interests due to its breaking diffraction limit of light and fast carrier dynamics ***,the main problem that need to be solved for plasmonic nanolaser is high loss induced by optical and ohmic losses,which leads to the low quality *** this work,InGaN/GaN nanoplate plasmonic nanolaser with large interface area were designed and fabricated,where the overlap between SPs and excitons can be *** lasing threshold is calculated to be~6.36 kW/cm^(2),where the full width at half maximum(FWHM)drops from 27 to 4 *** the fast decay time at 502 nm(sharp peak of stimulated lasing)is estimated to be 0.42 *** lasing characters are mainly attributed to the strong confinement of electromagnetic wave in the low refractive index material,which improve the near field coupling between SPs and *** plasmonic laser should be useful in data storage applications,biological application,light communication,especially for optoelectronic devices integrated into a system on a chip.

关键词： surface plasmon plasmonic laser GaN

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