检索结果-南通市图书馆

UV soaking for enhancing the photocurrent and response speed of Cs_(2)AgBiBr_(6)-based all-inorganic perovskite photodetectors

引用

Science China Materials 2022年第2期65卷 442-450页

作者： Ye Yuan Genghua Yan Zhuowei Li Bangqi Jiang Zongcun Liang Hong Jin Fan Wenjie Mai Institute for Solar Energy Systems Guangdong Provincial Key Laboratory of Photovoltaic TechnologySchool of PhysicsSun Yat-sen UniversityGuangzhou 510006China Siyuan Laboratory Guangdong Provincial Engineering Technology Research Center of Vacuum Coating Technologies and New Energy MaterialsDepartment of PhysicsJinan UniversityGuangzhou 510632China Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications Jinan UniversityGuangzhou 510632China School of Physical and Mathematical Sciences Nanyang Technological UniversitySingapore 637371Singapore

The response speed of the reported Cs_(2)AgBiBr_(6)-based photodetectors exhibits a wide variation ranging from microseconds to nanoseconds,while the reason is still *** from the conventional approaches such as reducing effective area,new regulating approaches for response speed improvement have rarely been *** the other hand,it is generally believed that ultraviolet(UV)light has negative impact on perovskite devices resulting in performance *** this work,we demonstrated that the response speed of the photodetector with FTO/Cs_(2)AgBiBr_(6)/Au structure can be effectively regulated by utilizing UV light-soaking effect without reducing the device ***,the decay time is efficiently modulated from 30.1μs to 340 *** addition,the−3 dB bandwidth of the device is extended from 5 to 20 *** is worth mentioning that the light current is remarkably boosted by 15 times instead of any ***,we prove the universality of UV soaking treatment on Cs_(2)AgBiBr_(6)-based photodetectors with other all-inorganic structures,i.e.,FTO/TiO_(2)/Cs_(2)AgBiBr_(6)/Au,FTO/Cs_(2)AgBiBr_(6)/TiO_(2)/Au and FTO/TiO_(2)/Cs_(2)AgBiBr_(6)/CuSCN/*** results demonstrate a new method to improve the response speed and light current of Cs_(2)AgBiBr_(6)-based perovskite all-inorganic photodetectors.

关键词： UV light all-inorganic perovskite photodetectors Cs_(2)AgBiBr_(6) photocurrent response speed

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Research on the response Characteristics of Solenoid Valve of the Air-jet Loom by Simulation

引用

Journal of Thermal Science 2013年第6期22卷 606-612页

作者： JIN Yuzhen DENG Ruoyu JIN Yingzi HU Xudong Faculty of Mechanical Engineering & Automation Zhejiang Sci-Tech University

Solenoid valve is one of the executive parts of weft insertion control system. According to the response characteristics of the solenoid valve, an improved design becomes a necessity. Firstly, the numerical model was established after analyzing the solenoid valve during its start-up and shut-down. Comparing the simulation data with the practical data, it is verified that the numerical simulation model has a high feasibility. Secondly, excitation voltage and spring pre-compression were adjusted respectively, and the response rules after adjusting were investigated. The research of the study shows: the response time tends to be inverse proportional to the excitation voltage during start-up, and it becomes a constant value with the increase of the excitation voltage; the response time is proportional to the spring pre-compression when the solenoid valve starts up, it is inverse proportional to spring pre-compression when the solenoid valve shuts down. And the total response time is a constant value with the increase of the spring pre-compression. Therefore, the value of the excitation voltage and the spring pre-compression should be selected when the curve is becoming flatten. The results of the research can provide the reference to the further development of the solenoid valve.

关键词： Air-jet loom Solenoid valve Numerical simulation response speed

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Fast-response,high-stability,and high-efficiency full-color quantum dot light-emitting diodes with charge storage layer

引用

Science China Materials 2022年第4期65卷 1012-1019页

作者： Yangbin Zhu Yang Liu Hailong Hu Zhongwei Xu Jieyu Bai Kaiyu Yang Tailiang Guo Fushan Li Institute of Optoelectronic Technology Fuzhou UniversityFuzhou350116China Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou350116China

Recently,solution-processed quantum dot lightemitting diodes(QLEDs)have emerged as a promising candidate for next-generation lighting and display ***,when given a constant voltage or current,the QLEDs need a certain working time to reach their maximum *** positive aging challenge,dramatically reducing the response speed of the device and causing a luminescence delay,is urgent to be investigated and *** the current work,we introduce a charge-storage layer architecture by inserting copper(I)thiocyanate(CuSCN)between the organic holeinjection layer and hole-transport *** extracted holes will be released during the next electrical signal stimulation to increase the efficiency of charge *** a result,the response speed of the QLEDs is improved by an order of *** addition,by inserting an inorganic CuSCN layer,the efficiency,lifetime,and environmental stability of red/green/blue full-color QLEDs are enhanced ***,this work provides a generic strategy for the fabrication of fast-response and high-efficiency full-color QLEDs without luminescence delay,which plays a critical role in the practical industrialization of QLEDs.

关键词： quantum dot response speed luminescence delay charge storage layer

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Cascade adaptive control of uncertain unified chaotic systems

引用

Chinese Physics B 2011年第4期20卷 165-170页

作者：魏伟李东海王京 School of Computer and Information Engineering Beijing Technology and Business University State Key Lab of Power Systems Department of Thermal EngineeringTsinghua University Engineering Research Institute University of Science and Technology Beijing

The chaos control of uncertain unified chaotic systems is considered. Cascade adaptive control approach with only one control input is presented to stabilize states of the uncertain unified chaotic system at the zero equilibrium point. Since an adaptive controller based on dynamic compensation mechanism is employed, the exact model of the unified chaotic system is not necessarily required. By choosing appropriate controller parameters, chaotic phenomenon can be suppressed and the response speed is tunable. Sufficient condition for the asymptotic stability of the approach is derived. Numerical simulation results confirm that the cascade adaptive control approach with only one control signal is valid in chaos control of uncertain unified chaotic systems.

关键词： unified chaotic systems cascade adaptive control approach response speed chaos control

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Recent research process on perovskite photodetectors:A review for photodetector——materials,physics,and applications

引用

Chinese Physics B 2018年第12期27卷 46-56页

作者： Yan Zhao Chenglong Li Liang Shen State Key Laboratory of Integrated Optoelectronics College of Electronic Science and EngineeringJilin University

The perovskite photodetectors can be used for image sensing, environmental monitoring, optical communication, and chemical/biological detection. In the recent five years, the perovskite photoelectric detectors with various devices are welldesigned and have made unprecedented progress of light detection. It is necessary to emphasize the most interesting works and summarize them to provide researchers with systematic information. In this review, we report the recent progress in perovskite photodetectors, including highly sensitive, ultrafast response speed, high gain, low noise, flexibility, and narrowband, concentrating on the photodetection performance of versatile halide perovskites(organic–inorganic hybrid and all inorganic compositions). Currently, organic–inorganic hybrid and all-inorganic halide microcrystals with polycrystalline film, nanoparticle/wire/chip, and block monocrystalline morphology control show important performance in response rate,decomposition rate, noise equivalent power, linear dynamic range, and response speed. It is expected that a comprehensive compendium of the research status of perovskite photodetectors will contribute to the development of this area.

关键词： perovskite photodetectors response speed detectivity linear dynamic range

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Advances in perovskite photodetectors

引用

InfoMat 2020年第6期2卷 1247-1256页

作者： Chenglong Li Yao Ma Yifan Xiao Liang Shen Liming Ding State Key Laboratory of Integrated Optoelectronics College of Electronic Science and EngineeringJilin UniversityChangchunChina Center for Excellence in Nanoscience(CAS) Key Laboratory of Nanosystem and Hierarchical Fabrication(CAS)National Center for Nanoscience and TechnologyBeijingChina

Perovskite photodetectors have gradually shown preeminent photoelectric performance due to the unique material *** recent years,lots of works have been reported in improving the sensitivity,changing detection spectrum range and enhancing long-term ***,we summarize the some efficient strategies for performance improvement and synchronously analyze severe issues exposed in ***,some reasonable proposals are put forward to solve future predicted *** addition,more prospective assumptions are proposed on the basis of the development trend in photoelectric detection *** hope this perspective will allow researchers to have a clearer understanding of recent studies based on perovskite photodetectors and inspire more meaningful work in the future.

关键词： detectivity perovskite photodetectors response speed stability

来源：

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

Hole-dominated Fowler–Nordheim tunneling in 2D heterojunctions for infrared imaging

引用

Science Bulletin 2021年第2期66卷 139-146,M0004页

作者： Lei Tong Meng Peng Peisong Wu Xinyu Huang Zheng Li Zhuiri Peng Runfeng Lin Qiaodong Sun Yaxi Shen Xuefeng Zhu Peng Wang Jianbin Xu Lei Ye School of Optical and Electronic Information and Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074China School of Physics and Innovation Institute Huazhong University of Science and TechnologyWuhan 430074China State Key Laboratory of Infrared Physics Shanghai Institute of Technical PhysicsChinese Academy of SciencesShanghai 200083China Shenzhen Institute of Advanced Electronic Materials Shenzhen Institutes of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China Department of Electronic Engineering Materials Science and Technology Research CenterThe Chinese University of Hong KongHong KongChina

Heterostructures based on diverse two-dimensional(2D)materials are effective for tailoring and further promoting device performance and exhibit considerable potential in ***,the problem of high-density thermionic carriers can be hardly overcome in most reported heterostructure devices based on type I and type II band alignment,which leads to an unacceptably small Iphoto/Idark and strong temperature dependence that limit the performance of ***,using the MoTe_(2)/h-BN/MoTe_(2)/h-BN heterostructure,we report the hole-dominated Fowler–Nordheim quantum tunneling transport in both on and off *** state-of-the-art device operating at room temperature shows high detectivity of>10^(8) Jones at a laser power density of<0.3 nW μm^(-2) from the visible to near infrared *** addition,the fast on–off switching and highly sensitive photodetection properties promise superior imaging *** tunneling mechanism,in combination with other unique properties of 2D materials,is significant for novel photodetection.

关键词： MoTe2 Fowler–Nordheim quantum tunneling response speed Photodetection High detectivity

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Sb_(2)Se_(3) film with grain size over 10μm toward X-ray detection

引用

Frontiers of Optoelectronics 2021年第3期14卷 341-351页

作者： Chong WANG Xinyuan DU Siyu WANG Hui DENG Chao CHEN Guangda NIU Jincong PANG Kanghua LI Shuaicheng LU Xuetian LIN Haisheng SONG Jiang TANG Sargent Joint Research Center Wuhan National Laboratory for Optoelectronics(WNLO)School of Optical and Electronic InformationHuazhong University of Science and Technology(HUST)Wuhan 430074China College of Physics and Information Engineering Institute of Micro-Nano Devices and Solar CellsFuzhou UniversityFuzhou 350108China

Direct X-ray detectors are considered as competitive next-generation X-ray detectors because of their high spatial resolution,high sensitivity,and simple device ***,their potential is largely limited by the imperfections of traditional materials,such as the low crystallization temperature of α-Se and the low atomic numbers of α-Si and α-***,we report the Sb_(2)Se_(3) X-ray thin-film detector with a p-n junction structure,which exhibited a sensitivity of 106.3 μC/(Gyair·cm^(2))and response time of<2.5 *** decent performance and the various advantages of Sb_(2)Se_(3),such as the average atomic number of 40.8 and μτ product(μ is the mobility,and τ is the carrier lifetime)of 1.29×1O^(-5) cm^(2)/V,indicate its potential for application in X-ray detection.

关键词： X-ray detector Sb_(2)Se_(3) p-n junction response speed grain size

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Analysis on Green Building Materials—Humidity Adjusting Materials

Analysis on Green Building Materials—Humidity Adjusting Mat...

引用

2011 International Conference on Materials for Renewable Energy & Environment(ICMREE 2011)

作者： Hongwei Wang Yushuang Jiang Hong Hao Pei Wang School of Municipal and Environmental Engineering Shenyang Jianzhu University Shenyang China

Analyses the influence of environment humidity to human living,expounds the theory of humidity adjusting materials,introduces the sort of humidity adjusting materials,and puts forward the future development trend of h... 详细信息

关键词： humidity adjusting materials response speed moisture content relative humidity

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Assignment of Rightmost Pole in Vehicle Platoon Based on Proportional-Retarded Controller

Assignment of Rightmost Pole in Vehicle Platoon Based on Pro...

引用

第43届中国控制会议

作者： Jie Wei Xu Zhu Yongming Shen School of Electronics and Control Engineering Chang'an University

Vehicle platoon holds great potential in enhancing traffic capacity,reducing fuel consumption,and decreasing pollution *** to the communication blockages and bandwidth limitations,it is inevitable to induce ***,most of the current research on the vehicle platoon with delay only focuses on analyzing and mitigating the negative impacts of the delay but overlooks its positive *** exert the positive effect of delay on the vehicle platoon control effectively,a proportional-retarded(PR) controller is designed in this ***,by analyzing the closed-loop characteristic equation via the Cauchy-Riemann equation,a novel method of assigning the rightmost pole is ***,according to the Routh-Hurwitz criterion and rigorous derivative analysis,it is confirmed that the rightmost pole cannot be arbitrarily assigned,thereby the assignment range of the rightmost pole is ***,a strategy of the rightmost pole assignment that maximizes the response speed of the vehicle platoon is ***,simulations are conducted to demonstrate the correctness of the theoretical claims.

关键词： Vehicle platoon Time delay PR controller Rightmost pole assignment response speed

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：