| Autor: | Jeung-Soo Huh, H. R. Hwang, J. H. Paik, Jong-Jae Lee, Dong-Seok Lee, D. D. Lee, Jeong-Ok Lim |
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| Rok vydání: | 2001 |
| Předmět: |
Materials science
Analytical chemistry Electrolyte Condensed Matter Physics Polypyrrole Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Vacuum evaporation chemistry.chemical_compound Differential scanning calorimetry chemistry Electrochromism Propylene carbonate Electrical and Electronic Engineering Acetonitrile Diffractometer |
| Zdroj: | Journal of Materials Science: Materials in Electronics. 12:41-44 |
| ISSN: | 0957-4522 |
| Popis: | 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. © 2001 Kluwer Academic Publishers |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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