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Reactive Vapor Deposition of Conjugated Polymer Films on Arbitrary Substrates

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Published on: January 17, 2018

Stretchable and Conductive Polymer Films Prepared by Solution Blending.

Pengcheng Li¹, Kuan Sun¹, Jianyong Ouyang¹

¹Department of Materials Science & Engineering, National University of Singapore , 7 Engineering Drive 1 117574, Singapore.

ACS Applied Materials & Interfaces

|August 8, 2015

Summary

Highly stretchable and conductive polymer films were created using poly(3,4-ethylenedioxythiophene):polystyrenesulfonate (PEDOT:PSS) blended with soft polymers. This significantly improved elasticity and conductivity for advanced electronics applications.

Keywords:

PEDOT:PSS conductive polymer elastic polymer blend stretchable conductor

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Area of Science:

Materials Science
Polymer Chemistry
Nanotechnology

Background:

Conducting polymers, essential for wearable electronics and healthcare devices, typically exhibit limited elasticity due to rigid conjugated backbones.
Developing materials that are both highly stretchable and conductive is crucial for next-generation electronic applications.

Purpose of the Study:

To enhance the stretchability and conductivity of poly(3,4-ethylenedioxythiophene):polystyrenesulfonate (PEDOT:PSS) films.
To explore the use of soft polymers as additives to improve PEDOT:PSS properties.

Main Methods:

Aqueous solutions of PEDOT:PSS were blended with soft polymers such as poly(ethylene glycol), poly(ethylene oxide), or poly(vinyl alcohol).
Films were prepared via coating or casting of these polymer blends.
Dimethyl sulfoxide (DMSO) or ethylene glycol (EG) were added to further enhance conductivity.

Main Results:

The addition of soft polymers increased the elongation at break of PEDOT:PSS films from 2% to up to 55%.
Conductivity of PEDOT:PSS was enhanced by soft polymers, rising from 0.2 S cm⁻¹ to 75 S cm⁻¹.
Further enhancement using DMSO or EG resulted in polymer blends with an elongation at break near 50% and conductivity of 172 S cm⁻¹.

Conclusions:

Blending PEDOT:PSS with soft polymers is an effective strategy to create highly stretchable and conductive films.
The developed materials show significant potential for applications in stretchable electronics and advanced healthcare devices.