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Proceedings Paper

Electrochromic multilayer device
Author(s): Tadeusz Lukaszewicz; Marian Kucharski; Anton Ravinski; Ewa Mrozek
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Paper Abstract

A new multilayer electrochromic device has been constructed according to the following pattern: glass1/ITO/WO3/gel electrolyte/BP/ITO/glass2, where ITO is a transparent conducting indium tin oxide film having the surface resistance equal to 8-10 Ω. Tungsten oxide (WO3) films were two-stage electrodeposited from the solution of sodium tungstate. To obtain a double layer, WO3 film was first crystallized by annealing in the air at a temperature of 450°C for 1 hour, and subsequently, another WO3 film was electrodeposited on it and annealing in the air at a temperature of 300°C for 1 hour. Obtained films had double layer structure: crystalline and amorphous/crystalline. Electrodeposited thin layer of prussian blue (PB) was a storage electrode of the device. A new gel electrolyte guaranteed high conductivity (σ = 4.8 mS•cm-1). It consisted of 38% EC, 38% PC, 8% LiCF3SO3, 10% PMMA, 6% PEO, THF, where PMMA - polimethylmetacrylate, and poly(ethylene oxide)PEO - based polymers electrolytes, containing lithium triftalate - LiCF3SO3 and using mixed solvent of propylene carbonate (PC) + γ-butyrolacton (γ-BL). The electrochromic devices obtained in the research are characterized by considerable transmittance variation between coloration and bleaching state (25-40% at applied voltage of 1.5 to 3 V), and also high coloration efficiency (above 100 cm2C).

Paper Details

Date Published: 22 October 2003
PDF: 7 pages
Proc. SPIE 5136, Solid State Crystals 2002: Crystalline Materials for Optoelectronics, (22 October 2003); doi: 10.1117/12.519753
Show Author Affiliations
Tadeusz Lukaszewicz, Technical Univ. of Bialystok (Poland)
Marian Kucharski, Technical Univ. of Bialystok (Poland)
Anton Ravinski, Technical Univ. of Bialystok (Poland)
Ewa Mrozek, Technical Univ. of Bialystok (Poland)

Published in SPIE Proceedings Vol. 5136:
Solid State Crystals 2002: Crystalline Materials for Optoelectronics
Jaroslaw Rutkowski; Antoni Rogalski, Editor(s)

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