高职《半导体器件物理》课程教学改革的探索

针对高职微电子技术专业开设的《半导体器件物理》课程出现的教学内容与实际工作衔接不上、课程教法陈旧、学生接受程度差等问题,本文通过分析高职微电子专业学生就业岗位的典型工作过程,提出适合高职的《半导体器件物理》教学内容,探索实施“实验向导”方式的教学活动,采用四维形成性考核方案,取得了一定的效果.     

一维PN结二极管稳态模型的数值模拟

用GUMMEL提出的一种非耦合算法对一维PN结二极管进行数值模拟，数值计算中采用有限差分结合解三对角矩阵的方法，通过对电场和电势的计算，得到了正偏、反偏和零偏置情况下电场、电势分布．收敛速度和计算的精确程度较普通算法有了一定的提高，为下一步射频二极管非稳态模拟奠定了基础．     

关于半导体器件物理课程教学方法改革的几点考虑

半导体器件物理是电子科学与技术专业高年级本科生的专业必修课程,它前承量子力学、固体物理、半导体物理、微电子工艺等课程,后启集成电路设计、集成电路CAD、集成电路测试分析等课程。针对该课程基础理论要求较高、综合性强、内容抽象等特点,提出了几点教学方法改革的思考。首先,强调半导体物理以及几个方程的基础地位,突出PN结、BJT和FET为课程重点;其次,构建启发式、讨论式的课堂教学模式,引导学生主动思考,锻炼设计思维;再次,布置仿真分析任务,借助TCAD工具加强对学生的实践训练;最后,结合学校开展的"本科生导师制",鼓励学生在实验室开展器件的应用以加深理解。通过以上几点教学改革,提高学生的学习效率和课程教学质量。     

半导体器件功率老化的结温控制方法研究

半导体器件功率老化所面临的主要问题是结温控制.为了确保半导体器件老化的可靠性,对现有的连续脉冲结温控制方法进行讨论和改进,并给出相应的结温测试电路.理论分析和实验表明,调整脉冲功率、脉冲占空比、脉冲频率,确能使器件结温达到老化的要求,并分析了脉冲功率、脉冲占空比、脉冲频率对结温的影响.最后在此基础上,提出一种多个分立器件使用单电源串行功率老化的方法.     

半导体器件教学方法的探讨

模拟电子电路的核心元件是半导体器件,因此对半导体器件原理及特性的掌握至关重要。学生入门便是接触半导体器件知识,通常感觉生僻难懂、学习吃力,对以后器件的应用更是无法得心应手。主要介绍笔者对这部分内容的教学心得,在教学过程中结合各种教学方法,让学生便于理解与识记。     

半导体器件在实际应用中的可靠性要求

本文通过具体事例,分析说明了半导体器件在使用中可能造成损坏或失效的原因及具体应用时应注意的问题.     

On Interactions of Microwave with Lightwave

This paper addresses interactions of lightwave with microwave,and is divided into two parts.In part one,the background and the main topics of the research filed are introduced.In part two,some research activities at Shanghai University are reviewed,These include optical control of microwave devices,photoinduced electromagnetic radiation,lightwave interaction with superconductors,microwave control of lightwave,and the microwave approach to highly irregular fiber optics.     

《半导体器件》课程教学的改革探索

针对《半导体器件》的课程特点,文章探讨了如何通过使用L-EDIT软件来改进该课程的教学方式和教学手段。在教学过程中应用L-EDIT软件更有利于学生对半导体器件的物理原理、器件结构及制造过程这三方面知识的综合理解和整体把握。教学实践表明,在《半导体器件》课程教学中引入L—EDIT可以收到良好的教学效果。     

半导体激光器中散热问题的研究现状及最新进展

在半导体大功率激光器的各种关键技术中,散热问题的解决是一个极其关键的技术。在管芯焊接的地方产生的热流量大约为1KW/cm2。这种热负载是限制激光器正常工作的关键因素。文章分析了半导体激光器的发热因素,并对了几种常见的热沉类型进行了分析研究。     

High efficient and high color rendering index white organic light-emitting diodes

We have fabricated high-efficient white organic light-emitting diodes (WOLEDs) using two types of electron transport materials with different electron mobility. The effect of the electron mobility on the device performance is discussed. In addition, to generate the desired white emission and high color rendering index, we perform the structure design of OLED, in which the functions of co-host of blue and green dopants on chromatic-stability are investigated. Experimental results find that the maximum color rendering index reaches as high as 91 at the voltage of 8 V.     

Effects of ultrasonic bonding parameters on reliability of flip chip GaN-based light emitting diode

This work applied the ultrasonic bonding to package flip chip GaN-based light emitting diodes (flip chip LEDs) on Si substrates. The effects of ultrasonic bonding parameters on the reliability of flip chip GaN-based LED were investigated. In the sequent aging tests, samples were driven with a constant current of 80 mA for hundreds hours at the room temperature. It was found that the electroluminescence (EL) intensity variation had a large correlation to the ultrasonic power, and then to the bonding temperature and force. A high bonding temperature and ultrasonic power and a proper bonding force improved the EL intensity significantly. It was contributed to a strong atom inter-diffusion forming a stable joint at the bonding interface. The temperature fluctuation in the aging test was the main factor to generate a high inner stress forming delamination at the interface between the chip and Au bump. As a result, delamination had retarded the photons to emit out of the LED packaging and decay its EL intensity.     

Platinum complexes as phosphorescent emitters in highly efficient organic light-emitting diodes

Applications of platinum complexes as phosphorescent emitters in high efficiency organic light-emitting diodes (OLEDs) were shortly discussed in this paper. Key recent studies on highly efficient blue, green, red and white-phosphorescent OLEDs based on Pt complexes are presented in terms of efficiency and color quality.     

压控振荡器中振荡电路的设计

介绍了一种振荡器,采用输出波形好、频率稳定度高、具有波段切换功能的改进型电容三点式振荡电路．在每一个波段内,频率的调节是通过改变压控振荡器的变容二极管的直流反向电压实现的．     

掺杂剂与基质材料能量匹配的红色有机发光二极管

1　Introduction　Organiclight emittingdiodes(OLEDs)haveattract edconsiderableattentionduetoitsgreatpotentialinefficiency ,low voltage ,large area ,lightweight ,andfull colorflat paneldisplays[1,2 ] .Forfull colordis plays ,itisnecessarytohaveefficientred ,green ,andblueemitterswithappropriatechromaticity .Bycom parisonwiththehighperformanceofblueandgreenOLEDs ,theperformanceandpurechromaticityofredOLEDsarestillrelativelypoor .UsuallyredOLEDsareimprovedbydopingreddyesintohostmaterialswit…     

基于间接电流控制方案的单／三相功率因数校正开关变流器研究

在大多数工业运用场合,三相整流电路由不可控二极管或相控晶闸管组成。这种变换器具有功率因数低、输入电流谐波成分高等缺点。利用功率因数校正（PFC）技术可以解决这些问题。论文对最常用的单、三相开关功率因数PFC进行了深入的研究。利用功率平衡和相量图,建立了三相电压型高功率因数整流器的静态数学模型,深入研究了系统参数与功率因数之间的稳态关系。在分析系统静态模型和稳态关系的基础上提出一种间接电流控制（PAC）方案,该方案与传统方案相比,并不检测输入电源电压,因而能减少硬件和降低成本。     

High-brightness organic light-emitting diodes

The research of high-brightness organic light-emitting diodes,as an important branch of organic light-emitting diodes (OLEDs),makes it possible for achieving high-brightness lighting source and lasing.Heat dissipation and efficiency roll off,as two main factors,affect the brightness of the OLEDs heavily.In this paper,high-brightness OLEDs are obtained by utilizing pulse voltage,small areas and micro-cavity structure to minimize the effect of the two factors.The major advances,ongoing challenges and future p...     

OLED照明及其关键技术

有机电致发光二极管(organic light-emitting diodes,OLED)在过去十多年中间获得了长足的发展,有望成为下一代高效固态光源。器件结构的改进和优化,新型材料的设计和合成以及电致磷光材料的普遍使用,使得目前WOLED的能量效率已经超过了传统的白炽光源。指出了OLED研究中的主要技术瓶颈,并对OLED技术在照明领域面临的机遇和挑战做出评述。