Characteristics of electrochromic device with polypyrrole and WO3

D. S. Lee; D. D. Lee; H. R. Hwang; J. H. Paik; J. S. Huh; J. O. Lim; J. J. Lee

doi:10.1023/A:1011268628803

Characteristics of electrochromic device with polypyrrole and WO₃

D. S. Lee, D. D. Lee, H. R. Hwang, J. H. Paik, J. S. Huh, J. O. Lim, J. J. Lee

Research output: Contribution to journal › Article › peer-review

22 Scopus citations

Abstract

The characteristics of electrochromic films (WO₃, V₂O₅) prepared by sol-gel-spin coating and a vacuum evaporation process were compared to identify a new application of an electrochromic display. Polypyrrole films were prepared by electropolymerization in a pyrrole solution, acetonitrile, and TEPS (tetraethylammonium p-toluenesulfonate). The liquid electrolyte was prepared using LiClO₄, propylene carbonate, polymethylmetacrylate, and ethyl acetate. The optical modulation of the electrochromic device was measured as the LiClO₄: PMMA weight ratio changed from 10:3 to 10:5. The highest optical modulation value was when the LiClO₄: PMMA weight ratio was 10:4. Each type of film was analyzed using a four-point probe, a differential scanning calorimeter (DSC), an X-ray diffractometer (XRD), and a UV-vis spectrophotometer (DR/4000H). The ESCA spectra of the WO₃ films showed that the tungsten oxidation number decreased in a coloration state.

Original language	English
Pages (from-to)	41-44
Number of pages	4
Journal	Journal of Materials Science: Materials in Electronics
Volume	12
Issue number	1
DOIs	https://doi.org/10.1023/A:1011268628803
State	Published - Jan 2001

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title = "Characteristics of electrochromic device with polypyrrole and WO3",

abstract = "The characteristics of electrochromic films (WO3, V2O5) prepared by sol-gel-spin coating and a vacuum evaporation process were compared to identify a new application of an electrochromic display. Polypyrrole films were prepared by electropolymerization in a pyrrole solution, acetonitrile, and TEPS (tetraethylammonium p-toluenesulfonate). The liquid electrolyte was prepared using LiClO4, propylene carbonate, polymethylmetacrylate, and ethyl acetate. The optical modulation of the electrochromic device was measured as the LiClO4: PMMA weight ratio changed from 10:3 to 10:5. The highest optical modulation value was when the LiClO4: PMMA weight ratio was 10:4. Each type of film was analyzed using a four-point probe, a differential scanning calorimeter (DSC), an X-ray diffractometer (XRD), and a UV-vis spectrophotometer (DR/4000H). The ESCA spectra of the WO3 films showed that the tungsten oxidation number decreased in a coloration state.",

author = "Lee, \{D. S.\} and Lee, \{D. D.\} and Hwang, \{H. R.\} and Paik, \{J. H.\} and Huh, \{J. S.\} and Lim, \{J. O.\} and Lee, \{J. J.\}",

year = "2001",

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doi = "10.1023/A:1011268628803",

language = "English",

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T1 - Characteristics of electrochromic device with polypyrrole and WO3

AU - Lee, D. S.

AU - Lee, D. D.

AU - Hwang, H. R.

AU - Paik, J. H.

AU - Huh, J. S.

AU - Lim, J. O.

AU - Lee, J. J.

PY - 2001/1

Y1 - 2001/1

N2 - The characteristics of electrochromic films (WO3, V2O5) prepared by sol-gel-spin coating and a vacuum evaporation process were compared to identify a new application of an electrochromic display. Polypyrrole films were prepared by electropolymerization in a pyrrole solution, acetonitrile, and TEPS (tetraethylammonium p-toluenesulfonate). The liquid electrolyte was prepared using LiClO4, propylene carbonate, polymethylmetacrylate, and ethyl acetate. The optical modulation of the electrochromic device was measured as the LiClO4: PMMA weight ratio changed from 10:3 to 10:5. The highest optical modulation value was when the LiClO4: PMMA weight ratio was 10:4. Each type of film was analyzed using a four-point probe, a differential scanning calorimeter (DSC), an X-ray diffractometer (XRD), and a UV-vis spectrophotometer (DR/4000H). The ESCA spectra of the WO3 films showed that the tungsten oxidation number decreased in a coloration state.

AB - The characteristics of electrochromic films (WO3, V2O5) prepared by sol-gel-spin coating and a vacuum evaporation process were compared to identify a new application of an electrochromic display. Polypyrrole films were prepared by electropolymerization in a pyrrole solution, acetonitrile, and TEPS (tetraethylammonium p-toluenesulfonate). The liquid electrolyte was prepared using LiClO4, propylene carbonate, polymethylmetacrylate, and ethyl acetate. The optical modulation of the electrochromic device was measured as the LiClO4: PMMA weight ratio changed from 10:3 to 10:5. The highest optical modulation value was when the LiClO4: PMMA weight ratio was 10:4. Each type of film was analyzed using a four-point probe, a differential scanning calorimeter (DSC), an X-ray diffractometer (XRD), and a UV-vis spectrophotometer (DR/4000H). The ESCA spectra of the WO3 films showed that the tungsten oxidation number decreased in a coloration state.

UR - https://www.scopus.com/pages/publications/0035017038

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DO - 10.1023/A:1011268628803

M3 - Article

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SN - 0957-4522

VL - 12

SP - 41

EP - 44

JO - Journal of Materials Science: Materials in Electronics

JF - Journal of Materials Science: Materials in Electronics

IS - 1

ER -

Characteristics of electrochromic device with polypyrrole and WO₃

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