Organic electronic devices using epitaxially grown conjugated polymer crystalline nanowires on carbon nanotube and graphene electrodes

这项研究的目的是开发一种新的方法，通过利用聚合物链和聚合物电极之间的强pi-pi相互作用来有效地注入和传输电荷，来制造高性能的有源场效应晶体管。该方法是通过在单壁碳纳米管和石墨烯电极上外延生长共轭结晶聚合物纳米线。通过在碳纳米管和石墨烯电极上直接生长结晶性聚(3-己基噻吩基)和聚(3，3-十二烷基季噻吩基)纳米线，制备有机晶体管，并研究其电荷传输特性。所建议的晶体管将具有以下具体优势：(I)结晶聚合物纳米线将具有更好的纳米形态，(Ii)电极与半导体材料之间的强pi-pi相互作用将提供更好的电荷注入，(Iii)更高的通电和工作频率将使其适合高频操作，以及(Iv)由于接触电阻降低和更好的沟道形态，纳米级晶体管将被展示为没有任何短沟道效应。高性能聚合物纳米线有机晶体管的成功展示将对包括柔性显示器、传感器片、射频识别标签和光伏在内的低成本塑料电子产品产生重大影响。教育和外联活动包括：(I)对研究生、本科生和高中生进行跨学科培训，(Ii)通过讲座和实验室演示将研究成果纳入新的研究生课程，(Iii)通过联合国儿童基金会多样性办公室倡议和S妇女研究中心招募少数族裔学生，以及(Iv)通过访问当地高中和通过网站和新闻信函向社区进行外联。

The objective of this research is to develop a novel approach for the fabrication of high performance organic field effect transistors by exploiting strong pi-pi interaction between the polymer chains and the polymer-electrodes for both efficient charge injection and transport. The approach is via epitaxial growth of conjugated crystalline polymer nanowires on the single walled carbon nanotubes and graphene electrodes. Organic transistors will be fabricated via direct growth of crystalline poly (3-hexylthiophene) and poly(3,3-didodecylquaterthiophene) nanowires on the carbon nanotubes and graphene electrodes and their charge transport properties will be studied. The proposed transistors will have the following specific advantages: (i) crystalline polymer nanowires will have improved nanomorphology, (ii) strong pi-pi interaction between electrodes and semiconducting materials will provide improved charge injection, (iii) higher on-current and operational frequency will make them suitable for high frequency operation, and (iv) owing to reduced contact resistance and better channel morphology, nanoscale transistors will be demonstrated without any short channel effect.The successful demonstration of high performance polymer nanowires based organic transistors will have significant impact in low cost plastic electronics including flexible displays, sensor sheets, radiofrequency identification tags, and photovoltaics. Education and outreach activities includes, (i) interdisciplinary training of graduate, undergraduate and high school students, (ii) integration of research results in a new graduate level course through lecture and lab demonstration, (iii) minority students recruitment through UCF Office of Diversity Initiative and Women?s Research Center and (iv) outreach to local high schools through visits and to the community through website and news letters.