AVS 53rd International Symposium
    Thin Film Thursday Sessions
       Session TF-ThP

Paper TF-ThP9
High-Performance Pentacene Thin-Film Transistors with PEDOT:PSS S/D Electrodes and Polymer Gate-Insulators

Thursday, November 16, 2006, 5:30 pm, Room 3rd Floor Lobby

Session: Thin Film Poster Session
Presenter: J.-M. Kim, Myongji University, Korea
Authors: J.-M. Kim, Myongji University, Korea
H.-J. Her, Myongji University, Korea
J. Kim, Myongji University, Korea
Y.J. Choi, Myongji University, Korea
C.J. Kang, Myongji University, Korea
D. Jeon, Seoul National University, Korea
Y.-S. Kim, Myongji University, Korea
Correspondent: Click to Email
Organic thin-film transistors (OTFTs) have been studied with much interests over the last decade, due to their attractive features such as low cost, low temperature processing and mechanical flexibility. Among the various organic semiconductors, pentacene-based TFTs show the best results in terms of the electrical performance, if the OTFTs are fabricated using inorganic gate-insulators, metal electrodes and silicon substrates. The device performance of OTFTs made only from organic materials, which are ideal for low cost, flexible and large-area electronic applications, has yet to be improved. The fully organic OTFTs implies organic gate insulators, conducting polymer electrodes and flexible substrates. We have fabricated pentacene TFTs in which the conventional inorganic gate-insulators, S/D metal electrodes and substrates are replaced by organic material, Poly (3, 4-ethylenedioxythiophene)-Polystyrene Sulfonate (PEDOT:PSS) and plastic substrates, respectively. The PEDOT:PSS S/D electrodes are deposited by inkjet printing technique for low cost and simple process. We also fabricated pentacene TFTs with several kinds of polymers as gate insulators. The physical and electrical properties of the polymer gate insulator are measured by atomic force microscope (AFM) and I-V measurement. In this work, fully organic pentacene TFTs with PEDOT:PSS S/D electrodes and polymer gate insulators are successfully demonstrated by simple process on the plastic substrate and their electrical properties are compared with conventional pentacene-based organic TFTs with inorganic electrodes and/or inorganic gate insulators.