Electronic, Chemical and Structural Properties of Metamorphic III-V Compound Heterojunctions and Devices

变质 III-V 化合物异质结和器件的电子、化学和结构特性

• 批准号: 0313468
• 负责人: Steven Ringel
• 金额: $ 90万
• 依托单位: Ohio State University Research Foundation -DO NOT USE
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-09-01 至 2007-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0313468&HistoricalAwards=false
• 关键词: Electronic; Chemical; Structural; Properties; Metamorphic

This FRG (focused research group) project addresses materials science issues of metamorphic--compositionally-graded, relaxed interlayers used to relieve strain between a substrate and desired heterostructures-III-V semiconductor heterostructures and the design and performance of metamorphic III-V devices. Objectives are to: understand complex inter-relationships between growth, nano-scale interface properties (electronic, chemical, structural), and bulk material properties for metamorphic and strained heterostructures and to use this understanding to generate novel, metamorphic devices that extend beyond current high speed devices. Several representative but related material systems that impact advances in device technology and in fundamental materials science are considered. The interdisciplinary team consists of researchers who combine complementary expertise in epitaxial growth, characterization, device design and fabrication, and theory with a shared interest to explore and exploit the relationships between growth, interface properties, electronic and structural properties, and device characteristics for lattice-mismatched heterostructures. Core activities include: (1) developing novel, anion-based III-V compound graded buffers that expand the possible material combinations for heterojunctions; (2) creating interface characterization techniques that provide key electronic, chemical, and structural information on heterojunctions formed under different controlled growth conditions; (3) using the flexibility of metamorphic transition layers to create novel device structures with advanced electronic features; and (4) developing theoretical methods that accurately describe heterojunction band offsets and deep levels based on atomic composition and geometrical structure. %%% An important impact of the project is in education and human resource development through the integration of research and education. The multi-disciplinary nature of the FRG team provides an environment where students can appreciate and learn a broad perspective on the research process. Individual student research topics are highly interdependent, which will provide an initial research experience that promotes the notion of teaming in their future careers. Overlapping interests with complementary skills among the principal investigators will allow students to broaden their experience beyond the norm by learning new techniques and participating in related research normally outside their advisor's activities. Thus, student education is integrated with research through a natural student-teacher exchange amongst all student FRG members. The research infrastructure being applied to this project is substantial, ranging from materials growth, to nano-scale characterization and advanced device fabrication and testing. Hence, students will be trained in state-of-the-art methods that will be cornerstones for their future careers that enhance the future infrastructure for research and education. The project is co-supported by the MPS/DMR/EM and ENG/ECS/EPDT Programs.***

这个FRG（重点研究小组）项目解决了变质的材料科学问题-成分分级，松弛中间层用于减轻衬底和所需异质结构-III-V半导体异质结构之间的应变，以及变质III-V器件的设计和性能。目标是：理解生长、纳米级界面特性（电子、化学、结构）和变形和应变异质结构的大块材料特性之间复杂的相互关系，并利用这种理解来生成超越当前高速器件的新型变形器件。考虑了影响器件技术和基础材料科学进步的几个具有代表性但相关的材料系统。跨学科团队由研究人员组成，他们将外延生长，表征，器件设计和制造以及理论方面的互补专业知识与共同兴趣相结合，探索和利用生长，界面特性，电子和结构特性以及晶格不匹配异质结构器件特性之间的关系。核心活动包括：(1)开发新型阴离子基III-V级化合物缓冲剂，扩大异质结材料组合的可能性；(2)创建界面表征技术，提供在不同受控生长条件下形成的异质结的关键电子、化学和结构信息；(3)利用变质过渡层的柔韧性，创造具有先进电子特征的新型器件结构；(4)发展基于原子组成和几何结构准确描述异质结带偏移和深能级的理论方法。该项目的一个重要影响是通过研究和教育的整合在教育和人力资源开发方面。FRG团队的多学科性质为学生提供了一个可以欣赏和学习研究过程的广阔视角的环境。个别学生的研究课题是高度相互依存的，这将提供一个初步的研究经验，促进他们未来职业生涯的团队合作的概念。在主要研究人员之间重叠的兴趣和互补的技能将允许学生通过学习新技术和参与通常不在其导师活动范围内的相关研究来拓宽他们的经验。因此，通过FRG所有学生成员之间的自然师生交流，学生教育与研究相结合。应用于该项目的研究基础设施是大量的，从材料生长到纳米级表征和先进设备的制造和测试。因此，学生将接受最先进的方法培训，这将成为他们未来职业生涯的基石，加强未来的研究和教育基础设施。该项目由MPS/DMR/EM和ENG/ECS/EPDT项目共同支持