首页 | 本学科首页   官方微博 | 高级检索  
     


Interfacial charge transfer in nanoscale polymer transistors
Authors:Jeffrey H Worne  Rajiv Giridharagopal  Kevin F Kelly  Douglas Natelson
Affiliation:(1) Department of Electrical and Computer Engineering, Rice University, 6100 Main St., Houston, TX 77005, USA;(2) Department of Physics and Astronomy, Rice University, 6100 Main St., Houston, TX 77005, USA
Abstract:Interfacial charge transfer plays an essential role in establishing the relative alignment of the metal Fermi level and the energy bands of organic semiconductors. While the details remain elusive in many systems, this charge transfer has been inferred in a number of photoemission experiments. We present electronic transport measurements in very short channel (L < 100 nm) transistors made from poly(3-hexylthiophene) (P3HT). As channel length is reduced, the evolution of the contact resistance and the zero gate voltage conductance are consistent with such charge transfer. Short channel conduction in devices with Pt contacts is greatly enhanced compared to analogous devices with Au contacts, consistent with charge transfer expectations. Alternating current scanning tunneling microscopy (ACSTM) provides further evidence that holes are transferred from Pt into P3HT, while much less charge transfer takes place at the Au/P3HT interface. MediaObjects/12274_2008_8037_Fig1_HTML.jpg This article is published with open access at Springerlink.com
Keywords:Organic semiconductors  band alignment  charge transfer  organic field-effect transistor  scanning tunneling microscopy
本文献已被 SpringerLink 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号