【摘 要】
：
In order to achieve effective coupling between the surface plasmon and the quantum wells (QWs) for surface plasmon LEDs,metal-embedded or thin p-GaN layer approach have been normally been used,but by
论文部分内容阅读
In order to achieve effective coupling between the surface plasmon and the quantum wells (QWs) for surface plasmon LEDs,metal-embedded or thin p-GaN layer approach have been normally been used,but by taking either of these methods,the enhancement of the IQE of the fabricated SP-LEDs is not remarkable,in some cases,the internal quantum efficiency even decreases.Here,this study is to clarify the origin and understand what kind of influence of temperature treatment to the LED structure.GaN based LEDs with Ag from the same epitaxial wafer were annealed under different temperatures to imitate the high temperature treatment during the SP-LED fabrication.The results show that the diffusion of Ag into the quantum wells could be one of the reasons and in order to realize SP-LEDs with high IQE,high temperature treatments need to be avoided to prevent the diffusion of metal.
其他文献
清代的皇室工程，是由内务府造办处经管的，造办处则设“样式房”专管工程规划设计事务。从康熙中叶起直至清末200余年间，在“样式房”牵头的，基本上是雷姓家族的前后五、六代建筑师，因而这个建筑世家被尊称为“样式雷”。本文浅谈了“样式雷”所藏圆明园工程图档的重要意义。
连续、准确监测动液面高度对掌握煤层气井的生产状况,并有效地采取排采控制措施具有十分重要的意义,本文主要针对液面自动测试仪在煤层气井的应用展开研究.根据煤层气井生产排采需求,设计了一种新型的液面自动测试仪监控系统,编写了液面测试的数据采集软件、服务器数据接收转存软件、客户端的液面曲线显示软件.采用GPRS或McWill无线传输网络,利用TCP/IP协议进行无线传输,实现了煤层气井液面测试数据的远传,
The application of high color rendering index (Ra) such as 90 or more than 90 has been discussed in this paper.The research results indicated that with selecting appropriate wavelength of blue chip an
Many of the reliability work involves extensive testing,finding failure modes,establishing a model for accelerated stress.However,to put a reliable product on the market involves a good product design
Flip-chip (FC) light-emitting diodes (LED) have been gaining increasing attention in current lighting industry for their prominent thermal performance and excellent light extraction efficiency.For an
A very high power wafer level light emitting diode (WL-LED) has been successfully fabricated on 2 inches InGaN/GaN epi-wafer based on high voltage design.The maximum light output power (LOP) was measu
For the poor resistance to heat and light damage as well as the warpage limitation,traditional thermoplastic reflecting material for LED leadframe reflector,such as Polyphthalamide (PPA) and Poly1,4-c
In this article,nitrides phosphors with 1113 structure and YAG yellow green phosphors which could be used to make white light LED at the color rendering index of 80 were discussed.On the one hand,thro
Generally using of LED-chips for displaying and lighting is becoming a trend today and also in future.The study focus on the process of assembling LED chips on the polyimide–CCL and molding the flexib
The degradation of luminous flux of LEDs is dependent on the type of LED and its operation conditions.That is why a prediction of lifetime often differs from case to case.Mostly,the testing times are