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All-Polymeric Flexible Transparent Heaters.

Magatte N Gueye1,2, Alexandre Carella1, Renaud Demadrille2

  • 1Université Grenoble Alpes, CEA, Liten, DTNM, SEN, LSIN , F-38000 Grenoble, France.

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Summary

Flexible transparent heaters (THs) made from poly(3,4-ethylenedioxythiophene) (PEDOT) offer high performance. These all-polymeric devices achieve low resistance, high transparency, and rapid heating for various applications.

Keywords:
PEDOTconducting polymersorganic transparent heatersthin-film heaterstransparent conductive materials

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Area of Science:

  • Materials Science
  • Polymer Science
  • Nanotechnology

Background:

  • Transparent heaters are crucial for various electronic applications.
  • Existing transparent heaters often rely on brittle or expensive materials.
  • The development of flexible, all-polymeric transparent heaters remains a significant challenge.

Purpose of the Study:

  • To demonstrate the first all-polymeric flexible transparent heaters (THs).
  • To investigate the performance of poly(3,4-ethylenedioxythiophene) (PEDOT)-based materials for transparent heating applications.
  • To evaluate the heating characteristics and potential applications of these novel THs.

Main Methods:

  • Fabrication of thin films using four different poly(3,4-ethylenedioxythiophene) (PEDOT)-based materials with varying dopants.
  • Characterization of electrical properties, including sheet resistance.
  • Assessment of optical properties, such as transparency and haze.
  • Evaluation of thermal performance, including heating rates and steady-state temperatures under electrical bias.
  • Measurement of areal power densities.
  • Validation using a thermal model.

Main Results:

  • Achieved low sheet resistances down to 57 Ω sq-1.
  • Maintained high transparency (>87%) with low haze (<1%).
  • Demonstrated excellent heating properties: high heating rates (up to 1.6 °C s-1) and steady-state temperatures exceeding 100 °C at 12 V.
  • Measured very high areal power densities, reaching nearly 10,000 W m-2.
  • Successfully fitted temperature increase to a thermal model.

Conclusions:

  • All-polymeric flexible transparent heaters based on PEDOT materials have been successfully demonstrated.
  • These THs exhibit superior electrical, optical, and thermal properties.
  • The developed THs are suitable for integration into thermochromic displays and visor deicing applications.