CAREER: Charge and Energy Transport in Highly Ordered Small-Molecule Organic Semiconductors

* 非技术性摘要 * 该奖项是根据2009年美国复苏和再投资法案（公法111-5）资助的。这个教师早期职业奖支持一个综合的教育和研究计划，解决高纯度有机半导体器件的基本电气和光学特性，如有机晶体管和太阳能电池。 这些设备是有机电子的基石，有机电子是一个新兴的领域，承诺更便宜，灵活，？更绿？电子学，并且其基础物理学尚未得到很好的发展。在这个程序的过程中，晶体结构和电学性质之间的内在相关性（例如，导电性）的高纯度有机半导体将被阐明。 将研究与太阳能电池技术相关的这些材料的光学性质，如激子（束缚电子-空穴对）的动力学。 因此，该计划将导致对电荷和激子运动及其对有机半导体分子/晶体结构的依赖性的基本理解，从而有助于对有机电子学和光电子学的基本理解。该项目的教育部分本质上与涉及新型半导体材料和器件的研究相结合。除了采用新的教学方法教授本科生和研究生课程外，还将进行以下创新：（a）新的半导体物理课程，重点是有机电子学，（B）与罗格斯大学科学教育系合作，为高中教师开设特别课程单元，向未来的科学家介绍现代半导体技术这一令人兴奋的领域，及（c）制作有关半导体技术的网上互动辅导课程。 * 技术摘要 * 该奖项是根据2009年美国复苏和再投资法案（公法111-5）资助的。 该教师早期职业奖支持一个综合的教育和研究计划，该计划解决了小分子有机半导体中固有（不受静态无序限制）极化子和激子传输的基本原理。高质量的分子单晶将为凝聚态物理的基础研究提供新的机遇。与多晶和非晶有机膜相比，这些系统中极化子和激子的动力学行为的探索得到了高结构有序性的明显优势的帮助。这些材料中的电荷和能量传输的研究对于阐明有机半导体的基本物理和将有机电子学引入大学课程至关重要。 该项目的主要概念性工作包括：1）研究高载流子密度下有机半导体中的新型输运机制和电子关联，2）测量高度有序分子晶体中的激子扩散长度，3）探索不同分子堆积的有机晶格中的本征极化子迁移率，4）研究有机半导体中的电子相互作用。理解无序和电荷俘获对载流子和激子输运的影响。该项目的教育部分将包括：（a）开发关于半导体研究实验技术的网上互动教程;（B）开发关于半导体物理学的创新研究生课程;（c）为高中教师设计特别课程单元，帮助在高中课堂上说明令人兴奋的现代半导体科学和技术。

****NON-TECHNICAL ABSTRACT****This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5). This Faculty Early Career Award supports an integrated educational and research program addressing the fundamental electrical and optical properties of high-purity organic semiconductor devices, such as organic transistors and solar cells. These devices are the building blocks of Organic Electronics, an emergent field that promises cheaper, flexible, ?greener? electronics, and for which the underlying physics has yet to be well developed. In the course of this program intrinsic correlations between the crystal structure and electrical properties (e.g., conductivity) of high-purity organic semiconductors will be elucidated. Optical properties, such as the dynamics of excitons (bound electron-hole pairs), of these materials related to solar cell technology will be investigated. This program will therefore result in a fundamental understanding of charge and exciton motion and their dependence on the molecular/crystal structure of organic semiconductors, thus contributing to an elementary understanding of organic electronics and photovoltaics. The educational component of this project is inherently integrated with research involving novel semiconductor materials and devices. In addition to employing new pedagogical methods for teaching undergraduate and graduate courses, the following innovations will be instituted: (a) a new curriculum in semiconductor physics with an emphasis on organic electronics, (b) special curriculum modules for high school teachers created in collaboration with the Department of Science Pedagogy at Rutgers University to introduce future scientists to the exciting field of modern semiconductor technology, and (c) a web-based interactive tutorial on relevant semiconductor technologies will be created. ****TECHNICAL ABSTRACT****This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5). This Faculty Early Career Award supports an integrated educational and research program that addresses the fundamentals of intrinsic (not limited by static disorder) polaronic and excitonic transport in small-molecule organic semiconductors. High-quality molecular single crystals used in this project will provide new opportunities for fundamental condensed-matter physics research. The exploration of the dynamical behavior of polarons and excitons in these systems is aided by the clear advantage of high structural order, compared to polycrystalline and amorphous organic films. Investigation of charge and energy transport in these materials is critical to illuminate the basic physics of organic semiconductors and to introduce organic electronics into the University curricula. The main conceptual thrusts of the project are: 1) Investigation of novel transport regimes and electron correlations in organic semiconductors at high carrier densities; 2) Measurements of the exciton diffusion length in highly ordered molecular crystals; 3) Exploration of the intrinsic polaron mobility in organic lattices with different molecular packing; and 4) Understanding the effects of disorder and charge trapping on charge carrier and exciton transport. The educational component of this project will include; (a) the development of a web-based interactive tutorial on Experimental Techniques in Semiconductor Research; (b) the development of an innovative graduate curriculum on Semiconductor Physics; and (c) the design of special curriculum modules for high school teachers that will help to illustrate the exciting modern semiconductor science and technology in high school classrooms.