选择掺杂

本文简要介绍了GaN薄膜的制备、衬底选择、掺杂、缓冲层、发光机制和表征等方面的最新进展，指出GaN材料进一步发展需要解决的关键技术问题。

Recent development for GaN thin films in preparation , choice of substrates , doping , buffer layer , photoluminescence mechanism and characterization was briefly described and reviewed . The key technologies to be solved for GaN thin films were pointed out .

因此本实验选择Ag作为掺杂物质进行探索性研究，对其薄膜在不同实验条件下的结构作了仔细分析，为日后深入研究奠定了实验基础。

So we choose it and make analysis of its structure under the different experimental conditions .

重点研究离子交换的材料和实验条件，包括玻璃的选择，作为掺杂离子源的熔盐，熔盐的熔点温度和离子交换的温度。

Focusing on the materials and experimental conditions , including glasses , doping ion source , temperature and so on .

因此选择适当的掺杂金属离子及控制材料的微观结构来有效地改善材料的性能。

Therefore , in this study , we have selected the appropriate doped metal ion and controlled the micro-structure of material to improve the material performance effectively .

介绍如何选择浅电子陷阱掺杂剂，用以提高卤化银乳剂的感光度、改善互易律失效等性能。

Selection of dopants for forming shallow electron traps which can increase the sensitivity and / or reduce reciprocity failure of emulsions is reviewed .

在此基础上，选择不同种类的掺杂酸制备聚苯胺，并讨论掺杂酸的种类对产物形貌的影响。

On the basis of comparation , different sorts of doping acids were used to synthesis polyaniline nanofibers and effect on morphology were also studied .

人们有一种假设，认为短期思维是季报压力所致。但神经学研究表明，企业选择客观、不掺杂情感因素的决策方式，才导致了短期思维。

It has been assumed that short-term thinking is a result of the pressure for quarterly results , but research in neuroscience suggests it is caused by the corporate preference for objective , unemotional decision making .