Journal
SOLAR ENERGY MATERIALS AND SOLAR CELLS
Volume 145, Issue -, Pages 16-25Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.solmat.2015.07.034
Keywords
Electrochromism; Silver; Nanoparticles; Deposition; Localized surface plasmon resonance; Multicolor device; Electronic paper
Funding
- Japan Society for the Promotion of Science (JSPS) [25620193]
- JST A-Step FS program from Japan Science and Technology Agency (JST) [AS242Z00605J]
- Futaba Electronics Memorial Foundation
- Chiba University VBL program
- Grants-in-Aid for Scientific Research [15K05660, 25620193] Funding Source: KAKEN
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Inorganic electrochromic (EC) materials are of interest because of their many possible applications, including use in information displays. The multifunctional EC materials that enable control of multiple colors and color depth have considerable promise as candidates for full color EC display devices. In this research, we focused on Ag nanoparticles that exhibit various colors on the basis of their localized surface plasmon resonance (LSPR). Because the LSPR band depends on the size and shape of the nanoparticles, control of the morphology of Ag nanoparticles can lead to dramatic changes in color. In order to apply this color variation for display devices, we utilized here the electrochemical formation of size-controlled Ag nanoparticles using a voltage-step method that consists of an application of two successive different voltages. In order to improve the variation of colors of the EC cell, the effect of application voltages and their times on morphology of deposited silver were investigated. The relationship between the morphology of the deposited Ag nanoparticles and color of the EC cell was discussed, and then we successfully represented multiple coloration of the EC cell with various color depth. (C) 2015 Elsevier B.V. All rights reserved.
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