Optical Properties of Organic Semiconductors for Device Applications

用于设备应用的有机半导体的光学特性

• 批准号: 0505773
• 负责人: Laurie McNeil
• 金额: --
• 依托单位: University of North Carolina at Chapel Hill
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-07-01 至 2009-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0505773&HistoricalAwards=false
• 关键词: Optical; Properties; Organic; Semiconductors; Device

TECHNICAL EXPLANATION This project addresses fundamental optical properties of high quality single crystals of a group of organic semiconductors-oligoacenes and their derivatives (including rubrene). These materials are the subject of intense development for use in device applications, but most measurements to date have been on thin-film devices in which intrinsic properties of the semiconductor have been substantially modified by film deposition and device processing. The approach is to use Raman scattering, photoluminescence, and optical absorption at varying temperature, pressure, and excitation energy to measure the optical properties of single crystals of oligoacenes and related materials, and their dependence on characteristics such as number of rings and intermolecular spacing. Additionally, computational modeling will be used to help assess the origin of observed properties, and to predict properties of related compounds. The combination of these two efforts (experimental and theoretical) is expected to lead to greater understanding of the relationship of intrinsic optical and electronic properties of these materials to their molecular and crystal structure. The project is collaborative with Christian Kloc of Lucent Technologies. Dr. Kloc and his co-workers are engaged in an active program of development of organic materials for electronic device applications, and are growing a wide variety of crystals whose properties (e.g. mobility) make them potential candidates for such applications.NON-TECHNICAL EXPLANATIONThe project addresses fundamental materials research with strong technological relevance to electronics and photonics, and effectively integrates research and education. The impact of the project includes education of the next generation of scientists with active PI emphasis on broadening participation of underrepresented groups. The students who participate in this project will develop not only advanced skills in characterization and spectroscopy, but also (through their direct collaboration with Dr. Kloc in the crystal growth) a deeper understanding of materials fabrication, helping them to be well prepared upon completion of their degrees to make significant contributions in the interdisciplinary environment found in today's leading industrial research and development facilities. Through the Summer Pre-Graduate Research Experience program at UNC-CH, the PI will bring students from underrepresented minorities into her laboratory to participate in the research activities and gain some of these same benefits.

本项目研究一组有机半导体——低聚芳烃及其衍生物（包括rubrene）的高质量单晶的基本光学性质。这些材料是用于器件应用的激烈开发的主题，但迄今为止，大多数测量都是在薄膜器件上进行的，其中半导体的固有特性已经通过薄膜沉积和器件加工得到了实质性的改变。该方法是利用拉曼散射、光致发光和在不同温度、压力和激发能下的光吸收来测量低聚丙烯酸酯及其相关材料单晶的光学性质，以及它们对环数和分子间距等特性的依赖。此外，计算模型将用于帮助评估观察到的性质的来源，并预测相关化合物的性质。这两种努力（实验和理论）的结合有望导致对这些材料的内在光学和电子特性与其分子和晶体结构之间关系的更好理解。该项目是与朗讯科技公司的Christian Kloc合作的。Kloc博士和他的同事们正在积极开发用于电子设备应用的有机材料，并正在培养各种各样的晶体，这些晶体的性质（例如迁移率）使它们成为此类应用的潜在候选者。本项目主要从事与电子、光子学相关的基础材料研究，有效地将科研与教育结合起来。该项目的影响包括下一代科学家的教育，积极的PI强调扩大代表性不足群体的参与。参与该项目的学生不仅将发展表征和光谱学方面的高级技能，而且（通过与Kloc博士在晶体生长方面的直接合作）对材料制造有更深入的了解，帮助他们在完成学位后做好充分准备，在当今领先的工业研发设施的跨学科环境中做出重大贡献。通过北卡罗来纳大学- ch的暑期研究生预科研究体验项目，PI将把来自代表性不足的少数民族的学生带到她的实验室参与研究活动，并获得一些相同的好处。