Optoelectronic Synapses and Photodetectors Based on Organic Semiconductor/Halide Perovskite Heterojunctions: Materials,Devices, and Applications

Both photodetectors (PDs) and optoelectronic synaptic devices (OSDs) are optoelectronic devices converting light signals into electrical responses. Optoelectronic devices based on organic semiconductors and halide perovskites have aroused tremendous research interest owing to their exceptional optical/electrical characteristics and low-cost processability. The heterojunction formed between organic semiconductors and halide perovskites can modify the exciton dissociation/recombination efficiency and modulate the charge-trapping effect. Consequently, organic semiconductor/halide perovskite heterojunctions can endow PDs and OSDs with high photo responsivity and the ability to simulate synaptic functions respectively, making them appropriate for the development of energy-efficient artificial visual systems with sensory and recognition functions. This article summarizes the recent advances in this research field. The physical/chemical properties and preparation methods of organic semiconductor/halide perovskite heterojunctions are briefly introduced. Then the development of PDs and OSDs based on organic semiconductor/halide perovskite heterojunctions, as well as their innovative applications, are systematically presented. Finally, some prospective challenges and probable strategies for the future development of optoelectronic devices based on organic semiconductor/halide perovskite heterojunctions are discussed.     

载货汽车轮毂爆裂原因的微量物证分析鉴定

随着中国经济的蓬勃发展,载货汽车已成为运输的主要工具,在利益的驱使下超载事故屡见小鲜。该文针对某载货汽车在行驶过程中,由于超载导致其右后车轮毂爆裂进行分析。通过外观检查、断口宏微观观察等技术手段,发现轮毂断口处存在大量河流状解理断裂,轮辐处同样存在大量河流状解理断裂。说明该载货汽车轮毂爆裂是由于严重超载及拆卸轮胎前已存在的轮辋断裂等原因造成的。其失效性质为脆性断裂、塑性断裂。     

饮食营养与癌症

饮食的变化与癌症的发病率有很明显的联系,本文着重论述了饮食营养中脂肪、蛋白质、维生素、矿物质同癌症之间的关系。     

水产食品熟食品和水产食品气调包装的研究

本文介绍水产食品、烘烤食品和熟食品的气调包装工艺。从混合气体配气比例、塑料包装材料的气体阻隔性、贮藏温度和包装前食品的卫生指标四个方面因素分析食品气调包装的保鲜效果。通过试验取得一些气调包装食品的保质期。     

电缆一体化监测平台开发与应用

电力电缆是城市配电网的主要组成部分之一,其工作状态直接关系到供电系统运行安全性和供电可靠性,有必要通过在线监测系统对电缆的状态进行实时监控。本文以青岛供电公司电缆监控应用系统为例,重点介绍了电缆一体化监测平台的开发与应用。     

基于单片机无线控制的多功能打铃仪设计

提出一种基于GPS授时与无线通信控制的新型智能电铃控制仪,打铃仪与主机之间使用433M的无线双工通信,主机实时比对作息时间表,控制电铃动作,且能根据季节变化,自动切换夏、冬季作息时间。控制器采用液晶交互界面,具有良好的人机交互接口,操作简单。分布在不同楼宇的打铃仪还具有盗险传感器的中继接口,在不同频道监测传感器数据,并根据不同的紧急情况发出不同的告警铃声。样机试运行效果良好,具有精度高、免调试等特点,可广泛应用于学校、厂矿企业等场合。     

互联网中基于信息量的信任管理系统

利用信息理论中信息量的概念,给出了一种使用统计量判断推荐者集体意见一致性的方法,该方法可以应用于直接和间接信任模型,使信任模型的设计更具可靠性,从而帮助交易者作出更优的决策。     

φ60mm掺碲GaP单晶的研制

用高压液封直拉法制备大直径GaP单晶重要的是控制拉制参数,如埚位、氧化硼厚度、热场、晶体坩埚直径比等.实验采用浮舟技术控制晶体直径,调整和控制参数使得晶体固液界面在拉制过程中始终凸向熔体,这对获得单晶非常重要.分析了晶体中电阻率、载流子浓度分布及位错分布.采用X射线双晶衍射对晶体质量进行了测试分析.     

携数字与模拟技术共赴前程--德州仪器CEO畅谈未来

75年历史对于一个半导体公司来说,已经是相当漫长的了。我们且回顾一下这10年之内整个半导体业有多少次跌宕起伏,有多少公司诞生又消逝。凡是顽强生存到今天的公司,无不是凭借实力在风雨中经受住了历练,变得更加成熟。     

Template‐Confined Dewetting Process to Surface Nanopatterns: Fabrication,Structural Tunability,and Structure‐Related Properties

Metallic surface nanopatterns are prepared by a template‐confined dewetting process with multiple structural controllabilities. The morphology of the building blocks is homogeneous throughout the surface nanopatterns, as the dewetting process proceeds separately in each bowl. The features of the building units in the surface patterns are highly dependent on the annealing temperature. Importantly, the size and composition of the nanoparticles in the surface nanopatterns can be pre‐calculated and designed by manipulating the thickness of the evaporated metallic films. The heating temperature and composition of the building units influence the surface‐enhanced Raman scattering (SERS) and plasmonic properties, thus tuning the localized surface plasmon resonance peaks over a broad range (from visible to near infrared). The introduction of silver in the gold surface nanopatterns enhances the SERS performance dramatically. This work not only provides a powerful route to fabricate surface nanopatterns, but also supplies a platform to study the mechanism of the complicated dewetting processes of metals.