Synthesis and characterization of ultra-thin and ultra-highly conductive poly(3,4ethylenedioxythiophene) nanofilm

6^th International Conference and Exhibition on Materials Science and Chemistry

May 17-18, 2018 | Rome, Italy

Sungsoo Kim, Feng Ma and Sangil Choi

Pai Chai University, Korea
Flexolution Corporation, Korea

Posters & Accepted Abstracts: J Material Sci Eng

Abstract :

Poly-3,4-ethylenedioxythiophene (PEDOT) is a very versatile and highly conductive polymer reported up to ca. 4,500 S/cm so far. In this study, PEDOT with an ultra-high conductivity of about 6,000 S/cm and an ultra-thin film of about 35 nm is presented. The PEDOT was processed via an oxidative chemical vapor phase polymerization method (VPP). Glass and PET surfaces were covered with ferric chloride (FeCl3) oxidizing agent mixed with polyurethane diol (DUDO) and poly(ethylene glycol�propylene glycol�ethylene glycol) (PEG-PPG-PEG) prior to their exposure to 3,4-ethylenedioxythiophene (EDOT) vapors. Optical microscope images show that the precursor film (oxidant mixture) covered on wafer or PET has very smooth and uniform surface. FE-SEM and AFM results revealed that PEDOT film after washing with n-butanol is very smooth, thin, and homogeneous (RMS is lower than 3 nm). Ultra-thin PEDOT films were further characterized by various other tools such as XRD, FT-IR, Raman, XPS, TGA, and so on. All other results obtained by various analyzing tools strongly support that PEDOT is indeed an ultra-highly conductive film far surpassing the most representative transparent electrode such as ITO (indium tin oxide).

Biography :

Sungsoo Kim has his expertise in surface and colloid science as well as in materials science especially including conducting polymers and organic semiconductors. He has a broad and intensive experience in R&D in addition to accomplishments in supervision of many graduate students. He is currently working on several projects for an organic electrochemical transistor based on a functionalized PEDOT active layer.
Email:skim@pcu.ac.kr