检索结果-南通市图书馆

Emerging high-entropy material electrodes for metal-ion batteries

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

SusMat 2024年第4期4卷 152-174页

作者： Jianyu Shen Zhen Zeng weihua tang College of Materials Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province(IKKEM)Institute of Flexible Electronics(Future Technologies)Xiamen UniversityXiamenChina

High-entropy materials(HEMs)have recently attracted extensive research *** unique structural characteristics and excellent mechan-ical/chemical properties,HEMs(especially high-entropy alloys and oxides)emerge as promising electrode materials for electrochemical energy *** herein present a critical review to update the recent progress in develop-ing new HEMs electrodes for various metal-ion *** design principle is discussed along with the preparation,characterization,and electrochemical performance as electrode *** current state-of-the-art HEM electrodes is presented,covering good capacity,rate capacity,and long-term cycle stability in ion *** addressing both the success and challenges associated with HEM development,this review contributes to the recent research efforts toward achieving higher capacity and more stable ion batteries.

关键词： high-entropy electrodes metal-ion battery energy storage

High-performance self-powered GaN/PEDOT:PSS hybrid heterojunction UV photodetector for optical communication

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China(Technological Sciences) 2024年第2期67卷 608-615页

作者： LI Shan LIU Zeng ZHANG MaoLin YANG LiLi GUO YuFeng tang weihua College of Integrated Circuit Science and Engineering&National and Local Joint Engineering Laboratory for RF Integration and Micro-Packing Technologies Nanjing University of Posts and TelecommunicationsNanjing 210023China

Self-powered ultraviolet photodetectors(UVPDs)provide great possibility for the next-generation energy conservation optical communication technology;while the high photodetection performance at zero bias is still a tremendous ***,ntype GaN film with Si-doping concentration of~1018cm^(-3)and p-type organic PEDOT:PSS were adopted to construct a planar hybrid heterojunction via the simple spin-coating *** from typical type-Ⅱenergy band alignment and giant photovoltaic effect at GaN/PEDOT:PSS inorganic-organic interface,the fabricated UVPD achieved excellent self-powered photoelectrical properties in dual-band with large R of 0.96 A/W(2.8 A/W),superior D*of 5.7×1012Jones(1.7×10^(13)Jones),prominent EQE of 325%(1371%),high on/off ratio of 9.65×10^(3)(6.15×10^(3))and fast rise/decay time of 60.7/124.5 ms(30.9/26.7 ms)for UVA(UVC)band,as well as outstanding UV/visible rejection ratio and great detection *** as an optical signal receiver,this designed self-powered UVPD decoded a message of“NJUPT”from a simple optical communication *** results open a new avenue for GaN/PEDOT:PSS heterojunction in UV communications and related applications.

关键词： GaN UV photodetector self-powered heterojunction optical communication

同方期刊数据库

High responsivity and fast response 8×8β-Ga_(2)O_(3)solar-blind ultraviolet imaging photodetector array

在线全文

学校读者我要写书评

暂无评论

Science China(Technological Sciences) 2023年第11期66卷 3259-3266页

作者： SHEN GaoHui LIU Zeng tang Kai SHA ShuLin LI Lei TAN Chee-Keong GUO YuFeng tang weihua Innovation Center of Gallium Oxide Semiconductor(IC-GAO) College of Integrated Circuit Science and EngineeringNanjing University of Posts and TelecommunicationsNanjing 210023China National and Local Joint Engineering Laboratory for RF Integration and Micro-Assembly Technologies Nanjing University of Posts and TelecommunicationsNanjing 210023China Key Laboratory of Aerospace Information Materials and Physics(NUAA) MIITNanjing 211106China College of Physics MIIT Key Laboratory of Aerospace Information Materials and PhysicsKey Laboratory for Intelligent Nano Materials and DevicesNanjing University of Aeronautics and AstronauticsNanjing 211106China Advanced Materials Thrust Function HubThe Hong Kong University of Science and Technology(Guangzhou)Nansha 511458China Department of Electronic and Computer Engineering School of EngineeringThe Hong Kong University of Science and TechnologyHong Kong 999077China

In this work,an 8×8 Ga_(2)O_(3)solar-blind ultraviolet photodetector array is introduced for image sensing *** 2-in wafer-scaled Ga_(2)O_(3)thin film was grown by metalorganic chemical vapor deposition technique;and the photodetector array was fabricated through ultraviolet photolithography,lift-off,and electron-beam *** addition to the high solar-blind/visible rejection ratio of 104,every photodetector cell in the array has high performance and fast response speed,such as responsivity of 49.4 A W^(-1),specific detectivity of 6.8×10^(14)Jones,external quantum efficiency of 1.9×10^(4)%,linear dynamic range of 117.8 d B,and response time of 41 ms,respectively,indicating the high photo-response performance of the ***,the photodetector array displayed uniform responsivity with a standard deviation of~6%,and presented a sensing image of low chromatic aberration,owing to the high resolution of the photodetector *** a word,this work may contribute to developing Ga_(2)O_(3)-based optoelectronic device applications.

关键词： Ga_(2)O_(3) photodetector array imaging photo-response

A low temperature processable tin oxide interlayer via aminemodification for efficient and stable organic solar cells

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2021年第5期30卷 496-503页

作者： Shun Guang Jiangsheng Yu Hongtao Wang Xin Liu Shenya Qu Rihong Zhu weihua tang MIIT Key Laboratory of Advanced Solid Laser Nanjing University of Science and TechnologyNanjing 210094JiangsuChina School of Chemical Engineering Nanjing University of Science and TechnologyNanjing 210094JiangsuChina School of Electronic and Optical Engineering Nanjing University of Science and TechnologyNanjing 210094JiangsuChina

The exploitation of proper electron transport layers(ETLs)and interface optimization can play a pivotal role to promote the performance of organic solar cells(OSCs).In this work,low temperature processable tin oxide(SnO_(2))colloidal nanoparticles with ethanolamine(EA)treatment are successfully employed for efficient and stable OSCs with light soaking *** EA is chemically bonded with SnO_(2),and the ethanolamine treated tin oxide(E-SnO_(2))layer delivers a suitable work function of 4.10 eV and a unique surface texture with suspended polar *** enhanced performance of E-SnO_(2) based OSCs can be attributed to the improved charge transport and electron extraction,which is correlated with the regulated energy level alignment and contact quality of E-SnO_(2)/active *** a result,considerable power conversion efficiencies(PCEs)of 10.30%,13.93%and 15.38%for PTB7-Th/PC_(71) BM,PM7/ITC6-4 F and PM6/Y6 based OSCs have been realized with E-SnO_(2) as ETL,*** with ZnO based devices,the E-SnO_(2) based OSCs exhibit an improved light aging stability,which can retain 94.3%of their initial PCE of 15.38%after 100 h light aging for E-SnO_(2)/PM6/Y6 based *** work demonstrates that the enormous potential of E-SnO_(2) to serve as ETL for high-efficiency and stable OSCs.

关键词： Light soaking free Electron transport layer SnO2 Low temperature Organic solar cells

Factors affecting the superconductivity in the process of depositing Nd_(1.85)Ce_(0.15)CuO_(4-δ)by the pulsed electron deposition technique

在线全文

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2007年第6期50卷 747-752页

作者： GUO YanFeng CHEN LeiMing GUO Xi LI PeiGang LEI Ming tang weihua Department of Physics Center for Optoelectronics Materials and DevicesZhejiang Sci-Tech UniversityHangzhou 310018China National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100080China Department of Mathematics and Physics Zhengzhou Institute of Aeronautical Industry and ManagementZhengzhou 450015China

On SrTiO3 single crystal substrate,by using the pulsed electron deposition tech-nique,the high-quality electron doped Nd1.85Ce0.15CuO4?δ superconducting film was successfully fabricated. After careful study on the R-T curves of the obtained sam-ples deposited with different substrate temperatures,thicknesses,annealing methods and pulse frequencies,the effects of them on the superconductivity of the films were found,and the reasons were also analyzed. Additionally,by using the same model of the pulsed laser deposition technique,the relation between the target-to-substrate distance and the deposition pressure was drawn out as a quantitative one.

关键词： pulsed electron deposition Nd_(1.85)Ce_(0.15)CuO_(4-δ) film superconductivity

First-principles study of lithium intercalated bilayer graphene

在线全文

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2012年第8期55卷 1376-1382页

作者： ZHOU JingJing ZHOU WeiWei GUAN ChunMei SHEN JingQin OUYANG ChuYing LEI MinSheng SHI SiQi tang weihua Department of Physics Center for Optoelectronics Materials and Devices Zhejiang Sci- Tech University Hangzhou 310018 China Department of Physics Jiangxi Normal University Nanchang 330022 China

Litbium intercalated bilayer graphene has been investigated using first-principles density functional theory calculations. Re- sults show that there exist AB and AA stacking sequences for bilayer graphene in which the latter is more favorable for the Li storage and the former will evolve into the latter with the intercalation of Li ions. The relationship between the interlayer dis- tance of two graphene sheets and the intercalated capacity of Li ions is discussed, It is found that structural defect is identified to store Li ions more favorably than pristine bilayer graphene and an isolated C atom vacancy in bilayer graphene can capture three Li ions between two graphene sheets.

关键词： bilayer grapheme lithium ion battery defect first-principles calculation

Au plasmon enhanced high performance β-Ga2O3 solar-blind photo-detector

在线全文

学校读者我要写书评

暂无评论

Progress in Natural Science:Materials International 2016年第1期26卷 65-68页

作者： Yuehua An Xulong Chu Yuanqi Huang Yusong Zhi Daoyou Guo Peigang Li Zhenping Wu weihua tang Laboratory of Optoelectronics Materials and Devices School of Science Beijing University of Posts and Telecommunications State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and Telecommunications Center for Optoelectronics Materials and Devices Department of Physics Zhejiang Sci-Tech University

Surface plasmon polariton（SPP） is electro-magnetic wave coupled to free electron oscillations near the surface of metal, and has been used to improve the photoelectric properties in many optoelectronic devices. In the present study, the Au nanoparticles（NPs）/β-Ga2O3composite thin film was fabricated through depositing Au ultra-thin film on the β-Ga2O3thin film followed by post-thermal treatment. Compared to bare β-Ga2O3thin film, a significant absorption around 510 nm, which is attributed to SPP of Au NPs, was observed in the UV–vis spectrum of Au NPs/β-Ga2O3composite thin film. The results showed that the photoresponse of Au NPs/Ga2O3photodetector illuminated under 254 nm +532 nm light was much higher than that illuminated under 254 nm light, indicating an enhancement of photoelectric property for the solar-blind photodetector based on β-Ga2O3thin film.

关键词： Au/Ga2O3 Surface plasmon polariton Enhance Solar-blind photodetector

Hetero-nanostructure of silver nanoparticles on MO_x(M=Mo,Ti and Si) and their applications

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Science China Chemistry 2011年第6期54卷 865-875页

作者： DONG WenJun ZHAO HaiXin LI ChaoRong MEI Jie CHEN BeYong tang weihua SHI Zhan FENG ShouHua Center for Optoelectronics Materials and Devices Center for Nanoscience and Nanotechnology ' Key Laboratory of Advanced TextileMaterials and Manufacturing Technology Ministry' of Education' Engineering Research Center for Eco-Dying & Finishing q[' Textiles' Zhejian g Sci- Tech UniversiO' Han gzhou 310018 China State Key Laboratory of Inorganic Synthesis and Preparative Chemisto' College of Chemistry Jilin University Changchun 130012 China

This paper reviews the recent research progress in the hetero-nanostructure of silver nanoparticles on MOx (M=Mo, Ti and Si). It describes the general synthesis of hetero-nanostructure of silver nanoparticles on MOx, and then outlines the interesting catalytic and sensing properties found in these hetero-nanostructures of silver nanoparticles on MOx.

关键词： hetero-nanostructure silver nanoparticles MoO3 TiO2 SiO2 catalyst and sensor

Oxygen vacancies modulating self-powered photoresponse in PEDOT:PSS/ε-Ga_(2)O_(3)heterojunction by trapping effect

在线全文

学校读者我要写书评

暂无评论

Science China(Technological Sciences) 2022年第3期65卷 704-712页

作者： LI Shan YUE JianYing LU Chao YAN ZuYong LIU Zeng LI PeiGang GUO DaoYou WU ZhenPing GUO YuFeng tang weihua Laboratory of Information Functional Materials and Devices School of ScienceState Key Laboratory of Information Photonics and Optical CommunicationsBeijing University of Posts and TelecommunicationsBeijing 100876China College of Electronic and Optical Engineering&College of Microelectronics National and Local Joint Engineering Laboratory for RF Integration and Micro-Packaging TechnologiesNanjing University of Posts and TelecommunicationsNanjing 210023China Center for Optoelectronics Materials and Devices&Key Laboratory of Optical Field Manipulation of Zhejiang Province Department of PhysicsZhejiang Sci-Tech UniversityHangzhou 310018China

Can the modulation effect of charge-carrier transfer be inherited from a single layer to its heterojunction structure?Certainly,the answer is ***,we experimentally verify that the photodetection performance modulation effect of oxygen vacancy(Vo)is transmitted from theε-Ga_(2)O_(3)layer to the PEDOT:PSS/ε-Ga_(2)O_(3)(PGO)hybrid *** adopting the annealedε-Ga_(2)O_(3)films,whose Voconcentrations are remolded by annealing ambients,the constructed PGO photodetectors(PDs)demonstrate regulable self-powered *** the V_(o)defects decrease,the photodetection properties are effectively enhanced with a high photo-to-dark current ratio of 2.37×10^(7),an excellent on/off switching ratio of 6.45×10^(5),fast rise/decay time of 121/72 ms,a large responsivity of 67.9 m A/W,superior detectivity of 9.2×10^(13)Jones,an outstanding external quantum efficiency of 33.2%,and a high rejection ratio(R_(250)/R_(400))of 5.96×10^(6)at 0 V in PGO-O;*** better photoresponse is attributed to the less V_(o)defect concentration in theε-Ga_(2)O_(3)layer,which could favor the lower electron-trapping probability and a more efficient charge-carrier *** the universality of V_(o)defects in oxide materials,the proposed regulation strategy of photoresponse will open the route of high self-powered performance for next-generation ultraviolet PDs.

关键词： oxygen vacancy self-powered photodetector heterojunction PEDOT:PSS/ε-Ga2O3