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Highly Stretchable and Highly Conductive PEDOT:PSS/Ionic Liquid Composite Transparent Electrodes for

Mei Ying Teo1, Nara Kim1, Seyoung Kee1

  • 1School of Materials Science and Engineering and Department of Nanobio Materials and Electronics, and ‡Heeger Center for Advanced Materials and Research Institute for Solar and Sustainable Energies, Gwangju Institute of Science and Technology , 123 Cheomdamgwagi-ro, Buk-gu, Gwangju 61005, Republic of Korea.

ACS Applied Materials & Interfaces
|December 20, 2016
PubMed
Summary
This summary is machine-generated.

Researchers developed a highly stretchable and conductive polymer using an ionic liquid. This material enables advanced stretchable electronics with stable performance up to 180% strain, overcoming key fabrication challenges.

Keywords:
PEDOT:PSSconducting polymersionic liquidsstretchable electronicsstretchable transparent electrodes

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Area of Science:

  • Materials Science
  • Polymer Science
  • Electronics Engineering

Background:

  • Stretchable conductive materials are crucial for next-generation electronics.
  • Achieving high stretchability, conductivity, and cost-effective fabrication simultaneously remains a challenge.

Purpose of the Study:

  • To develop a highly stretchable and conductive polymer composite.
  • To investigate the role of ionic liquids in enhancing polymer properties.
  • To fabricate and test stretchable electronic devices using the new material.

Main Methods:

  • Incorporation of 1-ethyl-3-methylimidazolium tetracyanoborate (EMIM TCB) ionic liquid into poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) solution.
  • Characterization of the composite's electrical conductivity and mechanical stretchability.
  • Fabrication of an alternating current electroluminescent device using PEDOT:PSS/EMIM TCB films as electrodes.

Main Results:

  • EMIM TCB acts as both a secondary dopant and plasticizer for PEDOT:PSS.
  • Achieved high conductivity (>1000 S cm⁻¹) and stable performance up to 50% tensile strain.
  • Demonstrated stable performance up to 180% strain with a prestrained substrate.
  • Fabricated a stretchable, semitransparent electroluminescent device with unimpaired performance at 50% strain.

Conclusions:

  • The PEDOT:PSS/EMIM TCB composite offers a promising solution for stretchable electronics.
  • Ionic liquid incorporation significantly enhances conductivity and stretchability.
  • The material is suitable for solution-processed, stretchable optoelectronic devices.