共查询到20条相似文献,搜索用时 109 毫秒
1.
GaP单晶衬底的位错密度对LED用LPE材料的影响李桂英杨锡震孙寅官王亚非(北京师范大学物理系,北京100875)关键词:GaPLED位错LPE1前言高效率绿色发光二极管(LED)的少数载流子扩散长度接近7μm[1]。当外延层的位错密度过高时,位错间... 相似文献
2.
讨论了GaAs与GaP的毒性、中毒症状和解毒方法,比较了砷、磷的毒性异同,提出了在GaAs与GaP材料加工过程中开展三废防治的设想。 相似文献
3.
简术了GaAs,GaP单晶材料近年来的生产与发展,国外生产厂家,品种和规模,以及目前单晶材料在发光领域内应用的现状和发展预测。 相似文献
4.
砷化镓材料发展和市场前景 总被引:8,自引:2,他引:6
综述世界GaAs材料器件的产销情况、市场前景及GaAs材料的发展趋势。预测2000年GaAsIC用于通讯将占GaAsIC市场的71%,并以年均增长率15%的速度发展。发光器件1999年增长12%,。其中激光器件增幅最大,达16%。GaAs材料电子哗啦和光电器件的比例约为2:#。对大直径、低位错、低热应力、高质量的GaAs单晶有较大的需求量。VB、VGF和VCZ是满足这些要求的最佳GaAs单晶生长方 相似文献
5.
6.
7.
阐述了GaP∶NLPE片纵向载流子浓度分布的测量方法, 探讨了各层载流子浓度和载流子浓度分布对发光效率的影响。 相似文献
8.
近期钢材价格的基本走势及调控对策的建议熊志军一、稳定钢材价格是稳定物价总水平的重要一环今年宏观经济发展基本目标是经济增长率9%,物价涨幅控制在10%。从一季度的经济实绩来看,今年9%的增长率基本可以实现,但高达20.1%的物价水平却增加了宏观调控的难... 相似文献
9.
10.
本文研究了在三种电解质中熔民解精炼制得的钆的性质。研究发现,在三种电解质中,金属钆沉积物具有不同形态--80molTLiC1-18mol%LiF-2mol%GdF3中为片状形态,750mol%LiF-10mol%BaF2-15mol%GdF3中为块状形态,75mol%LiF-25mol%GdF3中为针状形态,在LiF-BaF2-GdF3熔盐中,当电流提高到0.8A(初始电流密度1.6Acm^2)时 相似文献
11.
正With the signing of"Letter of intention for Propelling Integration of Shandong Rare Earth Enterprises"between Shandong Province Commission Of Economy and Informatization,China IronSteel Research Institute Group("China Steel Institute"),and China Rare MetalsRare Earth Co.,Ltd("China Rare Earth"),the"Shandong Rare Earth Group"jointly set up by the 3 units thus broke surface.On August 9,reporters of the China Economic Herald learned from Shandong Province 相似文献
12.
正In the face of the current situation of the lost WTO dispute on rare earth,and cancellation of export tariff for partial rare earth products,efforts of regulation and integration on rare earth by the state government will again be tightened.Reporters of the Economic Information Daily recently learned from authoritative sources that relevant ministries are 相似文献
13.
14.
15.
16.
17.
18.
正Last month,Chinalco signed framework agreement for strategic cooperation with Harbin Municipal Government in Harbin Xiong Weiping,Chairman of Chinalco,said that based on the strategic deployment to build world top-class mining company with the highest growth potential,Chinalco was now concentrating all efforts on making strategic transition and structural adjustment,strategic cooperation with the local governments where 相似文献
19.
《China Nonferrous Metals Monthly》2014,(12)
<正>According to the latest info from Jiangxi Province State-owned Assets Supervision and Administration Commission,Jiangxi Copper Corporation was approved to become the first pilot enterprise for deepening reform.Contents of the pilot work is"Three Self"(self expansion,self decision-making,self 相似文献
20.