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Proceedings Paper • Open Access

Relationship between optical property and nanoparticle morphology in silver deposition-based multicolor electrochromic device (Conference Presentation)
Author(s): Norihisa Kobayashi; Kazuki Nakamura; Tomoko Sugita

Paper Abstract

Electrochromism (EC) is defined as reversible color change caused by electrochemical redox reactions. EC display has various advantages comparable to conventional displays, such as high visibility under sun light, a memory effect, and color variation. EC display has been attracting significant interest for strong candidate in information displays such as electronic paper (E-paper). We reported Ag deposition-based EC device which showed reversible color change from transparent to chromatic coloration, black and silver-mirror in a single device. Also, by improving voltage-application sequence, three chromatic color such as magenta, cyan and yellow have been successfully observed in the Ag deposition–based EC device in our previous study. This is due to the localized surface plasmon resonance (LSPR) of Ag nanoparticles deposited on the electrode. Namely, LSPR band is known to change its absorption wavelength depending on the size and shape of the nanoparticles. In this study, this device newly enabled us to achieve green coloration and we analyzed relationship between optical properties and morphology of silver nanoparticles at four chromatic states with theoretical calculation.

Paper Details

Date Published: 18 October 2019
Proc. SPIE 11165, Optical Materials and Biomaterials in Security and Defence Systems Technology XVI, 111650A (18 October 2019); doi: 10.1117/12.2533999
Show Author Affiliations
Norihisa Kobayashi, Chiba Univ. (Japan)
Kazuki Nakamura, Chiba Univ. (Japan)
Tomoko Sugita, Chiba Univ. (Japan)

Published in SPIE Proceedings Vol. 11165:
Optical Materials and Biomaterials in Security and Defence Systems Technology XVI
Roberto Zamboni; François Kajzar; Attila A. Szep, Editor(s)

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