Highly Conductive, Stretchable, and Transparent PEDOT:PSS Electrodes Fabricated with Triblock Copolymer Additives and Acid Treatment

Jin Ho Lee, Yu Ra Jeong, Geumbee Lee, Sang Woo Jin, Yong Hui Lee, Soo Yeong Hong, Heun Park, Jung Wook Kim, Sang Soo Lee, Jeong Sook Ha

Research output: Contribution to journalArticlepeer-review

117 Citations (Scopus)

Abstract

Here, we report on a highly conductive, stretchable, and transparent electrode of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) fabricated via modification with triblock copolymer, poly(ethylene glycol)-block-poly(propylene glycol)-block-poly(ethylene glycol) (PEO20-PPO70-PEO20, Pluronic P123), and post-treatment with sulfuric acid. The fabricated electrode exhibits high transparency (89%), high electrical conductivity (∼1700 S/cm), and minimal change in resistance (∼4%) under repetitive stretch-release cycles at 40% tensile strain after stabilization. P123 acts as a secondary dopant and plasticizer, resulting in enhanced electrical conductivity and stretchability of PEDOT:PSS. Furthermore, after sulfuric acid post-treatment, P123 helps the electrode to maintain its stretchability. A successful demonstration of the stretchable interconnection was shown by stretching the P123-modified PEDOT:PSS electrodes, which were connected with light-emitting diodes (LEDs) in series. Finally, a stretchable and transparent touch sensor consisting of our fabricated electrodes and an LED array and stretchable semitransparent supercapacitor were presented, suggesting a great potential of our electrodes in the application to various deformable devices.

Original languageEnglish
Pages (from-to)28027-28035
Number of pages9
JournalACS Applied Materials and Interfaces
Volume10
Issue number33
DOIs
Publication statusPublished - 2018 Aug 22

Bibliographical note

Funding Information:
This study was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP) (No. NRF-2016R1A2A1A05004935). This study was also supported by the KU-KIST School Project.

Publisher Copyright:
Copyright © 2018 American Chemical Society.

Keywords

  • PEDOT:PSS
  • stretchable electronics
  • stretchable transparent electrode
  • sulfuric acid treatment
  • triblock copolymer

ASJC Scopus subject areas

  • General Materials Science

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