Facile method for enhancing conductivity of printed carbon nanotubes electrode via simple rinsing process |
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| Affiliation: | 1. Department of Nano, Medical and Polymer Materials, Yeungnam University, 280 Daehak-Ro, Gyeongsan 38541, Republic of Korea;2. School of Chemical Engineering, Yeungnam University, 280 Daehak-Ro, Gyeongsan 38541, Republic of Korea;3. Nano Materials & Components Research Center, Korea Electronics Technology Institute (KETI), Seongnam 13509, Republic of Korea;1. Engineering Science and Mechanics Department, Penn State University, University Park, PA 16802, USA;2. The Huck Institutes of the Life Sciences, Penn State University, University Park, PA 16802, USA;3. Department of Mechanical Engineering, National University of Singapore, Singapore 117576, Singapore;4. National University of Singapore (Suzhou) Research Institute, Suzhou Industrial Park, Suzhou 215123, People''s Republic of China |
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| Abstract: | We report a simple rinsing process to enhance the conductivity of printed carbon nanotube (CNT) electrodes. Polystyrene sulfonate(PSS)-wrapped CNTs were well dispersed in ethanol for printing via electrohydrodynamic (EHD) jet printing. PSS as a surfactant reduces the conductivity of CNT electrodes, restricting their applications in electronic devices. Even though the PSS rinsing process is necessary, it promotes delamination of CNTs. The challenges associated with the rinsing process and the delamination of CNTs were overcome in this study by introducing a polymer, poly(vinyl butyral-co-vinyl alcohol-co-vinyl acetate) (P(VB-co-VA-co-VAc)) as an adhesion layer. The use of P(VB-co-VA-co-VAc) increased the adhesion between the CNTs printed by the EHD jet technique and the underlying substrate during the CNT rinsing process. The rinsing process led to a significant enhancement in the conductivity of the CNT electrodes, and these electrodes were applied to organic field-effect transistor devices based on TIPS-pentacene. The device exhibited a high field-effect mobility of 0.25 cm2/(V·s). |
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| Keywords: | Macromolecule Electrohydrodynamic printing Carbon nanotubes Dispersion Polystyrene sulfonate Organic field-effect transistors |
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