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Realisation of Solid-State Electrochromic Devices Based on Gel Electrolyte.

Benedict Wen-Cheun Au1, Kah-Yoong Chan1, Mohd Zainizan Sahdan2

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|June 17, 2022
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Summary
This summary is machine-generated.

Solid polymer electrolytes (SPE) offer a solution to leakage issues in electrochromic devices (ECDs). While SPE-based ECDs show slower conductivity, they require less time for coloration compared to liquid polymer electrolyte (LPE) devices.

Keywords:
Electrochromic DeviceSolid Polymer ElectrolyteTungsten Oxide

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Area of Science:

  • Materials Science
  • Electrochemistry

Background:

  • Solid polymer electrolytes (SPE) are gaining interest for electrochromic devices (ECDs) to overcome electrolyte leakage and evaporation.
  • Electrochromic devices (ECDs) offer energy-saving applications by changing optical states with applied voltage.

Purpose of the Study:

  • To compare the electrochromic and optical properties of ECDs using solid polymer electrolytes (SPE) versus liquid polymer electrolytes (LPE).
  • To investigate the potential of solid-state electrolytes in ECDs to address persistent leakage and evaporation problems.

Main Methods:

  • Tungsten oxide (WO 3) films were prepared using sol-gel spin-coating.
  • ECDs were assembled using indium doped tin oxide (ITO) glass, WO 3 films, and either SPE or LPE.

Main Results:

  • SPE-based ECDs (SECDs) exhibited reduced ionic conductivity due to increased viscosity from PMMA, but faster coloration times.
  • Liquid polymer electrolyte ECDs (LECDs) demonstrated higher color efficiency (CE) and greater optical modulation compared to SECDs.

Conclusions:

  • This study provides a comparative analysis of LECD and SECD performance.
  • The findings offer insights into using solid-state electrolytes in ECDs to mitigate common implementation challenges.