Journal
CHEMISTRY OF MATERIALS
Volume 26, Issue 22, Pages 6477-6485Publisher
AMER CHEMICAL SOC
DOI: 10.1021/cm5039039
Keywords
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Funding
- Japan Society for the Promotion of Science (JSPS) [25620193]
- Japan Science and Technology Agency (JST) [AS242Z00605J]
- Futaba Electronics Memorial Foundation
- Chiba University VBL program
- Grants-in-Aid for Scientific Research [25620193, 14J07863] Funding Source: KAKEN
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Inorganic electrochromic (EC) materials have various advantages for use in display devices. We demonstrate here a new multicolor EC device based on an electrochemical silver deposition mechanism. Ag nanoparticles electrochemically deposited on an electrode exhibit a wide variety of optical states based on their localized surface plasmon resonance (LSPR). As LSPR bands and the resultant colors change depending on the size and shape of the nanoparticles, morphological control of the Ag nanoparticles enables multiple color representation. In order to exploit this color variation in inorganic EC devices, we investigated the electrochemical deposition of size- and shape-controlled Ag nanoparticles by varying the surface morphology of the electrode and by applying a step voltage, which consisted of the application of two consecutive different voltages. Using only silver deposition, we have successfully achieved the first LSPR-based multicolor EC device that enables reversible color changes, including three primary colorscyan, magenta, and yellowas well as transparent, black, and mirror in a single cell.
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