Details

Autor(en) / Beteiligte

• Dam, Thuc Hieu

Titel

Electrochromic properties of dual and hybrid ink-jet printed electrochromic devices containing combinations of polyaniline/PVME, poly(N-methylpyrrole)/PVME, and poly(3-(3-thienyl)propanesulfonate)

Ort / Verlag

ProQuest Dissertations & Theses

Erscheinungsjahr

2000

Quelle

ProQuest Dissertations & Theses A&I

Beschreibungen/Notizen

• Electrochromic devices were prepared by ink jet printing combinations of processable polyaniline, poly-N-methylpyrrole, and polythiophene materials onto working electrodes, which were then assembled with a polymer gel electrolyte and vanadium oxide coated counter electrodes into functional devices. When two electrochromes were dither printed in various ratios on working electrodes, their perceived colors were subtractive color combinations of the two individually deposited electrochromes. The ability to efficiently mix electrochromes in this manner created a viable means for tailoring electrochromic device colors from a limited number of processable electrochromic polymers. Color changes for dual ink electrochromic devices were measured using spectrocolorimetric techniques and analyzed using Commission Internationale de l'Eclairage (CIE) 1931 (x,y)-chromaticity coordinates. The printed device's colors in their fully doped and dedoped states were linearly dependent on the composition of the two individual deposited polymers. Hybrid electrochromic devices were fabricated by combining two components: a semitransparent ink jet printed electrochromic device overlaying a none lectrochromic printed color background. The devices' electrodes were patterned using ink jet printing technology utilizing aqueous electrochromic inks containing processable polyaniline, poly-N-methylpyrrole, and polythiophene composites and derivatives. The counter electrodes consisted of a layer of vanadium pentoxide deposited via a sol-gel process onto ITO coated Mylar™. When a semitransparent device overlaped various ink jet printed color backgrounds, the hybrid device's perceived color was a combination of the foreground electrochromic device's color and the background nonactive printed color. Color changes for the hybrid electrochromic devices were measured using spetrocolorimetric techniques and analyzed using Commission Internationale de l'Eclairage (CIE) 1931 (x,y)-chromaticity coordinates. Scanned images for all devices were also acquired. The hybrid device's colors in their fully doped and dedoped states varied linearly between color coordinates of the foreground and background colors.