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Intrinsically Stretchable Integrated Passive Matrix Electrochromic Display Using PEDOT:PSS Ionic Liquid Composite.

Claire Preston1, Yuta Dobashi1, Ngoc Tan Nguyen1

  • 1Advanced Materials and Process Engineering Laboratory, Department of Electrical and Computer Engineering, University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada.

ACS Applied Materials & Interfaces
|June 5, 2023
PubMed
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This summary is machine-generated.

Researchers developed intrinsically stretchable electrochromic devices for wearable applications. These devices offer significant optical changes and stability under strain, paving the way for advanced electronic skins and displays.

Area of Science:

  • Materials Science
  • Polymer Science
  • Electrochemistry

Background:

  • Electrochromism offers low power consumption, suitable for smart windows and mirrors.
  • Flexible electrochromic devices are promising for wearable technology.
  • Stretchable electrochromic elements are needed for conformability to complex surfaces.

Purpose of the Study:

  • To demonstrate fully integrated, intrinsically stretchable electrochromic devices.
  • To evaluate their performance as single elements and displays under strain.
  • To assess their stability and suitability for wearable and robotic applications.

Main Methods:

  • Combining ionic liquid-doped poly(3,4-ethylenedioxythiophene) polystyrene sulfonate with a poly(vinyl alcohol)-based electrolyte.
  • Fabricating single electrochromic elements and 3x3 passive matrix displays.
Keywords:
PEDOTconducting polymer, ionic skin, electronic skindisplayelectrochromicstretchable

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  • Testing optical changes (transmission and reflectance), switching times, and stability under electrochemical and mechanical strain cycling.

    • Main Results:

    • Achieved a 15% transmission change and 25% reflectance change.
    • Demonstrated switching times under 7 seconds, even at 30% strain.
    • Showcased stability under strain cycling and addressability with low cross-talk in a passive matrix display.

    Conclusions:

    • Intrinsically stretchable electrochromic devices exhibit comparable performance to flexible counterparts with enhanced deformability.
    • These devices are suitable for wearable electronics, biometric monitoring, and robotic skin applications.
    • The developed technology enables robust, strain-tolerant electrochromic displays.