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Proceedings Paper

Enhanced smart window based on electrochromic (EC) polymers
Author(s): Chunye Xu; Lu Liu; Susan E. Legenski; Marie Le Guilly; Minoru Taya; Art Weidner
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Paper Abstract

A large contrast ratio and rapid switching EC polymer device which consists of a laminated two-layer structure between two electrodes was prepared. The new design consists of an ITO glass electrode, a cathodic EC polymer film, a gel electrolyte and a counter-electrode that replaces the anodic EC polymer and ITO electrode. Several types of EC polymers, such as, poly[3,3-dimethyl-3,4-dihydro-2H-thieno(3,4-b)(1,4)dioxepine] (PProDOT-(CH3)2) and poly[3,4-(2,2-dimethylpropylenedioxy)-pyrrole] (PProDOP-(CH3)2) were synthesized as cathodic EC polymers. A carbon-based counter-electrode was prepared for comparison with an Au-based counter-electrode. Screen-printing was utilized for the carbon-based counter-electrode. Lithography and sputtering were used for the Au patterned glass counter-electrodes. Several kinds of polymer gel electrolytes were prepared for solid-state applications. Color change of high contrast ratio of visible light transmittance (>ΔΤ55%)of the device is rapidly obtained (0.5-1s) when even less than 2.5V is applied. The repeatability of color changeable EC polymer windows was estimated by the method of electrochemistry and spectrophotometry. This "smart window" technology can be used in many applications where a rapid color change between transparent and color states is required.

Paper Details

Date Published: 28 July 2003
PDF: 8 pages
Proc. SPIE 5051, Smart Structures and Materials 2003: Electroactive Polymer Actuators and Devices (EAPAD), (28 July 2003); doi: 10.1117/12.484393
Show Author Affiliations
Chunye Xu, Univ. of Washington (United States)
Lu Liu, Univ. of Washington (United States)
Susan E. Legenski, Univ. of Washington (United States)
Marie Le Guilly, Univ. of Washington (United States)
Minoru Taya, Univ. of Washington (United States)
Art Weidner, - (United States)

Published in SPIE Proceedings Vol. 5051:
Smart Structures and Materials 2003: Electroactive Polymer Actuators and Devices (EAPAD)
Yoseph Bar-Cohen, Editor(s)

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