Tailoring the Properties of Dilute Nitride-Bismide Semiconductor Alloys

定制稀氮化物-双胺半导体合金的性能

• 批准号: 1006835
• 负责人: Rachel Goldman
• 金额: $ 45万
• 依托单位: Regents of the University of Michigan - Ann Arbor
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-07-01 至 2015-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1006835&HistoricalAwards=false
• 关键词: Tailoring; Properties; Dilute; Nitride; Bismide

Technical: This project aims for greater understanding of the microstructure and properties of dilute nitride-bismide semiconductor alloy heterostructures. The project is interdisciplinary and collaborative among investigators at U-Michigan, U-Notre Dame, U-College Cork, and the Tyndall Institute (Ireland). A primary objective is to identify and understand synthesis/processing mechanisms along with conditions needed to manipulate the microstructure and consequent electronic states and optical emission efficiencies of these materials. Dilute nitride-bismide alloy films will be synthesized using plasma-assisted molecular-beam epitaxy, using both amphoteric (group IV) and alternative (group VI) dopants. The microstructure will be tailored using a novel approach to seed compositional patterns using pre-growth focused-ion-beam implantation. The atomic-to-nanometer-scale structure will be determined using state-of-the-art microscopic and spectroscopic techniques. These results will be interpreted using a complementary set of computational studies, including density functional theory, tight-binding calculations, and effective-mass based calculations.Non-technical: The project addresses basic research issues in a topical area of materials science with technological relevance in electronics and photonics. The scientific insights from this project are expected to enable the development of temperature-insensitive light-emitters, high efficiency photovoltaics, and high performance transistors to be used in the telecommunications, radar, and automotive industries. Graduate, undergraduate, and high school students will benefit from working together in an interdisciplinary scientific learning environment across disciplines of chemistry, physics, and engineering. The established collaboration constitutes an advantageous approach, benefitting from the complementary expertise of investigators covering theory and experiment. The new knowledge created will be broadly disseminated through publications and presentations. Outreach activities will emphasize the mentoring of women and underrepresented minorities.

技术：该项目的目的是对稀氮化物 - 贝斯利德半导体合金异质结构的微观结构和特性有更深入的了解。该项目是U-Michigan，U-Notre Dame，U-College Cork和Tyndall Institute（爱尔兰）的研究人员的跨学科和合作。一个主要目的是识别和理解合成/加工机制，以及操纵微观结构以及随之而来的电子状态以及这些材料的光学排放效率所需的条件。稀氮化合物合金膜将使用血浆辅助分子束外延，使用两性（IV组）和替代性（VI组）掺杂剂合成。微观结构将使用一种新型的方法来量身定制，使用新的种子组成模式使用生长前的浓缩离子束植入。原子至纳米尺度结构将使用最先进的显微镜和光谱技术确定。这些结果将使用一组互补的计算研究来解释，包括密度功能理论，紧密结合计算和基于有效的质量计算。Non-non-technical：该项目解决了材料科学领域的基础研究问题，具有电子和光子学方面的技术相关性。预计该项目的科学见解将使温度不敏感的光发射器，高效率光伏以及高性能晶体管的发展用于电信，雷达和汽车行业。研究生，本科和高中生将在化学，物理和工程学科的跨学科科学学习环境中共同工作。既定的合作构成了一种有利的方法，这受益于涵盖理论和实验的研究人员的补充专业知识。创建的新知识将通过出版物和演讲大致传播。外展活动将强调妇女和代表性不足的少数群体的指导。