ORGANICS: A Spectroscopic Probe of Charge Injection Phenomena in Polymer Field Effect Transistors

本提案的目的是使用一种新的光谱方法系统地研究聚合物基场效应晶体管（FET）中的电荷注入。光谱探测器将允许团队研究和阐明参数空间中的电荷注入效应，这是其他技术无法实现的。实验工作将与聚合物中的电子结构，声子谱和极化子形成的理论分析以及FET器件中开发的静电势和肖特基势垒的检查相协调。以聚（3-己基噻吩）为活性半导体的场效应晶体管器件将作为本研究计划的试验平台。除了问题的基本方面之外，鉴于基于FET架构的众多电子和光子器件方案，电荷注入的问题具有最重要的实际意义。在这个项目中开发的实验方法可以很容易地扩展到研究注入在各种FET器件的基础上其他类别的半导体。拟议工作的智力价值：这支研究团队将采用全新的实验方法解决聚合物FET器件的物理和材料科学中的一些长期存在的问题。拟议活动的更广泛的影响：在这个具有挑战性的计划中，研究和教育的整合将有助于培养具有学术界和工业界高需求领域专业知识的高技能人才。

The objective of this proposal is to systematically investigate charge injection in polymer-based field-effect transistors (FET) using a novel spectroscopic approach. The spectroscopic probe will allow the team to study and elucidate charge-injection effects in the parameter space that is unattainable by other techniques. The experimental work will be coordinated with the theoretical analysis of the electronic structure, phonon spectrum and polaron formation in polymers as well as by the examination of the electrostatic potential and Schottky barriers developed in FET devices. FET devices with Poly(3-hexylthiophene) as the active semiconductor will be the test bed of this research program. Apart from fundamental aspects of the problem, the issue of charge injection is of paramount practical interest in view of numerous electronics and photonics device schemes based on FET architecture. The experimental approaches developed within this project can be readily extended to study injection in a variety of FET devices based on other classes of semiconductors. Intellectual merits of the proposed work: this team of investigators will address some of the long-standing problems in the physics and materials science of polymer FET devices employing entirely novel experimental approaches. Broader impact of proposed activities: the integration of research and education within this challenging program will aid the preparation of highly skilled personnel with expertise in an area of high demand both in academia and in industry.