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Characterization of Transparent Electrodes using Carbon Nanotubes Coated by Conductive Polymers  

Kim, Bu-Jong (Dept. of Electronic Systems Engineering, Hanyang University (ERICA))
Han, Sang-Hoon (Dept. of Electronic Systems Engineering, Hanyang University (ERICA))
Park, Jin-Seok (Dept. of Electronic Systems Engineering, Hanyang University (ERICA))
Publication Information
Journal of the Semiconductor & Display Technology / v.13, no.1, 2014 , pp. 19-25 More about this Journal
Abstract
This study demonstrates transparent electrodes with characteristics desirable for touch screen panels using carbon nanotubes (CNTs). This has been accomplished by depositing CNTs on glass substrates via spray coating and then depositing thin conductive polymer films on the CNTs via spin coating. For all of the samples, such as CNTs, conductive polymers, and polymer-coated CNTs, the surface morphologies, sheet resistances, visible transmittances, chromatic properties are characterized as functions of their preparation conditions, such as the spray times for CNTs and the spin speeds for conductive polymers. The experimental results confirm that only the polymer-coated CNTs can satisfy all of the requirements that are required for electrodes of touch screen panels, such as the sheet resistance lower than $100{\Omega}/sq$, the visible transmittance higher than 80 %, and the yellowness smaller than 1.
Keywords
Carbon nanotubes (CNTs); Conductive polymers; Spray coating; Spin coating; Sheet resistance; Transmittance; Yellowness; Transparent electrodes for touch screen panels;
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