Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 8, Issue 23, Pages 14795-14801Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.6b01911
Keywords
multielectrochromics; smart windows; PVA gels; polyelectrolytes; viologens
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Stimuli-responsive reversible coloration-change materials represent a highly demanded type of smart systems useful for a wide variety of applications, with a significant growing interest in multicolor abilities. In particular, electrochromic materials have received a great deal of attention due to their versatility and broad range of industrial uses. However, most of the existing electrochromic technologies provide a single coloration, while achieving multiple colors based on simple approaches remains a challenge. The present article reports on PVA gel-based electiochromic devices, containing a, single viologen, providing a colorless and two different well colored states. The successful fabrication of a device, based on two viologens (multi-EC gel) with a simple architecture (glass/TCO/multi-EC gel/TCO/glass), with five different multiswitchable colors based on four-zoned electrodes (rainbow-like ECD) is also demonstrated. This novel easy-to make multichromic system represents a significant breakthrough toward the generation of full-color devices, expanding the potential of,electrochromic technology.
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