Thermally stable electrochromic devices using Fe(II)-based metallo-supramolecular polymer

Sanjoy Mondal, Takefumi Yoshida, U. Rana, Manas Kumar Bera, Masayoshi Higuchi

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)


A solid-state electrochromic (EC) device with high thermal durability was successfully fabricated by the combination of Fe(II)-based metallo-supramolecular polymer (polyFe) as a cathodically coloring EC layer, a poly(methyl methacrylate)-based solid-state electrolyte layer, and Prussian blue (PB) as an anodically coloring EC layer between two indium tin oxide (ITO)-coated glass conducting substrates. Spray coating technique was used to make polyFe film on ITO-glass. Counter materials were investigated to improve the long-term durability and performance of solid state devices. The polyFe layer thickness was optimized at 240 ± 50 nm, resulting in better electrochromic performance of the fabricated device with transmittance change of ~54% and 95% cyclic stability after 1000 cycles with a short response time by applying voltages of +2.7 V and −1.3 V reversibly. Importantly, the thermal stability of the fabricated solid device was also explored, and we achieved maximum temperature stability at 100 °C with 50% retention of device properties in this study.

Original languageEnglish
Article number110000
JournalSolar Energy Materials and Solar Cells
Publication statusPublished - 2019 Sep 15
Externally publishedYes


  • Counter material
  • Device durability
  • Electrochromic device
  • Film thickness
  • Polymeric gel electrolyte
  • Thermal stability

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films


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