Interdiffusion of si and ge atoms during epitaxy growth of ge layer on si studied by raman spectroscopy 分子束外延生长高应变单量子阱激光器
2.
Xps depth measurement suggested that the films were compositionally homogeneous along the growth direction ; that the interdiffusion between znsxse1 - x and ito was not serious in this deposition process ; and a sharp interface had developed Xps深度剖析显示所制备的薄膜，其内部成分均匀，无偏析和凝聚，界面清晰而陡峭，扩散不严重。
3.
In the paper we mainly researched space gainp2 / gaas / ge high efficiency tandem cells " making process by home - made low pressure mocvd technology and new solar concentrators . firstly , we presented reseached and development of solar cells in china and foreign countries ; secondly , on the basis of fundamental priciples and theories , we discussed some factors of influcing conversion efficiency of solar cells , and analysed the i - v output feature of two - junction tandem cells ; then the design concept of gainp2 / gaas / ge two - junction tandem cells was discussed , the detailed aspects of gainp2 / gaas / ge tandem cells epitaxy growth by low pressure mocvd was studied , and some questions on epitaxy growth ( such as crystal qualities , interface stress , element interdiffusion , n - and p - type doping et all ) were solved ; after that , the cell fabrication process was described ; finally , we reseached the hot pressing and mould process technology of an arched line - focus fresnel lens made by pmma , designed and fixed new solar concentrators 本文致力于用自制的低压mocvd装置进行cainp _ 2 / gaas / ge空间用高效级联太阳能电池制作的工艺以及聚光太阳能电池组件的研究。首先，介绍了国内外太阳能电池的研究现状及应用情况；其次，运用太阳能电池基本原理讨论影响电池转换效率的因素，分析了级联电池的伏安特性；随后，讨论了cainp _ 2 / gaas / ge双结级联电池的结构设计理念，研究了采用低压mocvd技术生长cainp _ 2 / gaas / ge级联太阳电池材料的工艺过程，解决了异质材料生长的结晶质量、界面应力、材料互扩散以及材料n 、 p型掺杂等一系列问题；然后总结了级联电池的后工艺制作；最后，研究了以pmma为材料的菲涅耳线聚焦透镜的热压成型工艺及其模具的加工工艺，设计并安装完成新型聚光太阳能电池组件。
4.
The researches of vacuum electron beam self - material brazing specimen find that element interdiffusions are strongly occurred in interface and some new phases are precipitated during welding . the interdiffusion process is likely approached to nb atoms diffusing into stainless steel side according to the analysis of the morphology and eds of the interdiffused layer Tem分析发现， 1300退火形中国原子能科学研究院硕士学位论文成的扩散层中有大量的针状析出相产生，经sadp测定为乙一( nb ， ni )相，而基体相为( ni ， cr ， nb ， c ) fe一。
