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Coloration mechanisms of Ag deposition‐based multicolor electrochromic device investigated by morphology of Ag deposit and its optical properties
Author(s) -
Onodera Ryou,
Tsuboi Ayako,
Nakamura Kazuki,
Kobayashi Norihisa
Publication year - 2016
Publication title -
journal of the society for information display
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.578
H-Index - 52
eISSN - 1938-3657
pISSN - 1071-0922
DOI - 10.1002/jsid.451
Subject(s) - electrochromism , magenta , cyan , materials science , surface plasmon resonance , deposition (geology) , absorption (acoustics) , prussian blue , optoelectronics , thin film , reflection (computer programming) , nanoparticle , plasmon , absorption spectroscopy , electrochemistry , electrode , nanotechnology , optics , chemistry , computer science , inkwell , paleontology , physics , sediment , composite material , biology , programming language
Electrochromism, phenomenon of reversible color change induced by electrochemical redox reactions, is one of the prime candidates for full‐color electronic paper. Recently, we reported Ag‐deposition based multicolor electrochromic device showing color change between three primary colors of cyan, magenta, and yellow. These observed spectra include both absorbing and reflectance components. Therefore, it is necessary to separate these components in order to analyze coloration mechanism of the device. In this paper, coloration mechanisms of Ag deposition‐based multicolor electrochromic device were investigated in terms of measurement of the actual absorption and actual reflection of the device. Morphologies of the deposited Ag nanoparticles were also investigated by FE‐SEM, and then relationship between optical properties and deposited Ag morphologies was examined. As the results, color appearances of magenta and yellow state of the device were mainly dominated by absorption component of localized surface plasmon resonance of the deposited Ag nanoparticles. On the other hand, cyan state of the device was based on absorption as well as reflection component induced by thin film structure of the Ag deposit.