Journal
OPTICAL MATERIALS
Volume 31, Issue 10, Pages 1467-1471Publisher
ELSEVIER
DOI: 10.1016/j.optmat.2009.02.004
Keywords
Organic-inorganic hybrid electrolytes; Sputtering; Electrochromic materials
Categories
Funding
- University of Minho
- Fundacao para a Ciencia e a Tecnologia [POCI/QUI/59856/2004, POCTI/SFA/3/686, SFRH/BD/22707/2005, SFRH/BD/38616/2007]
- Fundação para a Ciência e a Tecnologia [SFRH/BD/22707/2005, POCI/QUI/59856/2004, SFRH/BD/38616/2007] Funding Source: FCT
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Sol-gel derived cross-linked PEO/siloxane xerogels (designated as di-ureasils) were prepared using lithium trifluoromethanesulfonyl imide (LiTFSI) as a guest salt. In this paper we describe the assembly of a prototype solid-state electrochromic device (ECD) based on a four-layer sandwich structure, with the following configuration: glass/IZO/WO3/polymer electrolyte/IZO/glass. The electrochromic switching performance of these devices was characterized as a function of salt concentration. The average transmittance in the visible region of the spectrum was above 69% for all the bleached samples characterized. After coloration the structures assembled with d-U(900)(n)LiTFSI presented an average transmittance in the visible wavelength region above 22% and an optical density above 0.49. (C) 2009 Elsevier B.V. All rights reserved.
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