A Facile Approach for Constructing Conductive Polymer Patterns for Application in Electrochromic Devices and Flexible Microelectrodes

Dabum Kim, Jeonghun Kim, Youngsang Ko, Kyubin Shim, Jung Ho Kim, Jungmok You

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)

Abstract

We developed a novel strategy for fabricating poly(3,4-ethylenedioxythiophene) (PEDOT) patterns on various substrates, including hydrogels, via sequential solution procedure without multistep chemical etching or lift-off processes. First, PEDOT nanothin films were prepared on a glass substrate by solution phase monomer casting and oxidative polymerization. As a second step, after UV-induced poly(ethylene glycol) (PEG) photolithography at the PEDOT/PEG interface through a photomask, the hydrogel was peeled away from the PEDOT-coated glass substrate to detach the UV-exposed PEDOT region, which left the UV nonexposed PEDOT region intact on the glass substrate, resulting in PEDOT patterns. In a final step, the PEDOT patterns were cleanly transferred from the glass to a flexible hydrogel substrate by a direct-transfer process based on a second round of gelation process. Using this strategy, PEDOT patterns on ITO glass or ITO film were used to successfully fabricate an electrochromic (EC) device that exhibited stable electrochromic switching as a function of applied potential. Furthermore, PEDOT patterns on hydrogel were used to fabricate all organic, flexible microelectrodes with good electrical properties and excellent mechanical flexibility. Importantly, the conductivity of PEDOT patterns on hydrogel (ca. 235 S cm-1) described here is significantly higher than that previously reported (ca. 20-70 S cm-1). This approach can be easily integrated into various technological fabrication steps for the development of next-generation bioelectronics systems.

Original languageEnglish
Pages (from-to)33175-33182
Number of pages8
JournalACS Applied Materials and Interfaces
Volume8
Issue number48
DOIs
Publication statusPublished - 2016 Dec 7

Bibliographical note

Funding Information:
This study was supported by the National Research Foundation of Korea (NRF) grant funded by the Korean government (MSIP) (No.2015R1C1A1A01054258).

Publisher Copyright:
© 2016 American Chemical Society.

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

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