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18 October 2019 Relationship between optical property and nanoparticle morphology in silver deposition-based multicolor electrochromic device (Conference Presentation)
Norihisa Kobayashi, Kazuki Nakamura, Tomoko Sugita
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Proceedings Volume 11165, Optical Materials and Biomaterials in Security and Defence Systems Technology XVI; 111650A (2019) https://doi.org/10.1117/12.2533999
Event: SPIE Security + Defence, 2019, Strasbourg, France
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.
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Norihisa Kobayashi, Kazuki Nakamura, and Tomoko Sugita "Relationship between optical property and nanoparticle morphology in silver deposition-based multicolor electrochromic device (Conference Presentation)", Proc. SPIE 11165, Optical Materials and Biomaterials in Security and Defence Systems Technology XVI, 111650A (18 October 2019); https://doi.org/10.1117/12.2533999
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KEYWORDS
Silver
Nanoparticles
Optical properties
Colorimetry
Absorption
Electrodes
Sun
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