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Fabrication and Performance Evaluation of a Nanostructured ZnO-Based Solid-State Electrochromic Device.

Marivone Gusatti1, Daniel Aragão Ribeiro de Souza1, Mario Barozzi2

  • 1Institute of Chemistry, Department of Analytical, Physical, and Inorganic Chemistry, São Paulo State University (UNESP), Araraquara 14800-060, São Paulo, Brazil.

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PubMed
Summary

This study introduces a novel, all-solid-state electrochromic device (ECD) using spray-coated zinc oxide nanorods. This sustainable and cost-effective ECD offers efficient, reversible color switching for advanced display technologies.

Keywords:
Al counter electrodePEDOT:PSSZnO-based ECDcoloration efficiencyelectrochromic responsespray coating technique

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Nanotechnology

Background:

  • Conventional electrochromic devices (ECDs) often rely on scarce materials and liquid electrolytes, limiting their practical application.
  • Developing solid-state ECDs with scalable fabrication is crucial for next-generation smart windows and displays.

Purpose of the Study:

  • To develop a cost-effective, all-solid-state electrochromic device (ECD) using industrially scalable techniques.
  • To investigate the electrochromic properties and electrochemical stability of a novel device architecture based on zinc oxide nanorods.

Main Methods:

  • Synthesized zinc oxide nanorods (ZnOnano) via a solochemical route.
  • Fabricated an all-solid-state ECD using spray coating on an Al-coated glass substrate (glass/Al/ZnOnano/PEDOT:PSS).
  • Characterized the device's electrochromic performance, including switching behavior, transmittance modulation, coloration efficiency, and electrochemical stability.

Main Results:

  • The developed ECD demonstrated reversible switching between light blue and dark blue states.
  • Achieved a high coloration efficiency of 275.62 cm2/C at 600 nm with significant transmittance difference in the visible-NIR spectrum.
  • Exhibited good electrochemical stability, maintaining transmittance modulation after 12,800 seconds, with response times of 9.92 s (coloring) and 7.51 s (bleaching).

Conclusions:

  • The study successfully presents a sustainable and efficient all-solid-state ECD using economical fabrication methods.
  • The novel ZnOnano-based ECD design avoids critical materials and liquid electrolytes, paving the way for potential industrial adoption.
  • This advancement offers a promising alternative to traditional ECDs for various applications.