Water-Based Highly Stretchable PEDOT:PSS/Nonionic WPU Transparent Electrode

Youngno Kim, Sinseok Yoo, Jung Hyun Kim

Research output: Contribution to journalArticlepeer-review


Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) has the merits of high electrical conductivity and solution processability, and can be dispersed in water. To improve the stretchability of PEDOT:PSS-based transparent electrode films, the intrinsically conducting polymer PEDOT:PSS was blended with highly stretchable nonionic waterborne polyurethane (WPU) and coated on a thermoplastic polyurethane (TPU) film. Nonionic WPU has good compatibility with PEDOT:PSS, without affecting the acidity. WPU undergoes hydrogen bonding and coulombic at-tractions with PEDOT:PSS. With variation of the WPU content, differences in the electrical proper-ties, such as the sheet resistance and mechanical stretchability, of the coated thin films were observed. The film with 2.0 wt% WPU could be stretched to 400% of the electrode surface without damage to the surface of the electrode films. The WPU and TPU films both have a polyester group, which provides good adhesion between the WPU-based transparent electrodes and the TPU substrate films. A stretchable alternating current electroluminescence (ACEL) device was constructed by using the water-based PEDOT:PSS/nonionic WPU composite as both the bottom and top transparent electrodes. The fabricated ACEL remained its initial luminance in the 500% stretched state.

Original languageEnglish
Article number949
Issue number5
Publication statusPublished - 2022 Mar 1

Bibliographical note

Funding Information:
Funding: This research was supported by the Technology Innovation Program (20013621, Center for Super Critical Material Industrial Technology) funded by the Ministry of Trade, Industry, & Energy (MOTIE, Korea), the Korea Initiative for fostering University of Research and Innovation (KIURI) Program of the National Research Foundation (NRF) funded by the Korean government (MSIT)(NRF-2020M3H1A1077207),NationalResearchFoundationofKorea(NRF)grantfundedby the Korea government (MSIT) (NRF-2020M3H4A3081821) and Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (NRF-2019R1A6A1A11055660) and Korea Institute of Planning and Evaluation for Technology in Food, Agriculture and Forestry (IPET) through Agricultural Machinery/Equipment Localization Technology Development Program, funded by Ministry of Agriculture, Food and Rural Affairs (MAFRA) (121027031HD020).

Publisher Copyright:
© 2022 by the authors. Licensee MDPI, Basel, Switzerland.

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Polymers and Plastics


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