56.4: Naturally White Electrochromic Display Using Organic/Inorganic Nanocomposite Pulp

Nakashima, M.; Hatusaka, Kazuaki; Kawai, Kazunari; Shishikura, Masami; Ebine, Toshihiro; Suzuki, Yasuyuki

doi:10.1889/1.2720339

Cited by 3 publications

(1 citation statement)

References 5 publications

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“…However, various reflective display devices, which have been examined and practically used up to now, have a chromophore mechanism fundamentally different from that of paper because they use a white pigment such as titanium dioxide , , thus a paperlike natural white color has not been obtained. In this study, we have done various examinations using newly developed organic/inorganic nanocomposites in order to develop an electronic paper with a natural white background similar to paper (see ref for our preliminary results).…”

Section: Introductionmentioning

confidence: 99%

Bismuth Electrochromic Device with High Paper-Like Quality and High Performances

Nakashima

Ebine

Shishikura

et al. 2010

ACS Appl. Mater. Interfaces

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An electrochromic-type electronic paper was prepared using nanocomposites that consisted of silica nanoparticles (silica 60 wt %) and polyamide pulp. Its light scattering, ion transport, and aqueous electrolyte retention characteristics were examined. As a result, the shape of the nanocomposites was completely self-standing, though it could be impregnated with about nine times as much water on a weight basis. Moreover, its light scattering property was extremely similar to paper. Because of the impregnation of a large amount of water, the ion transport property of the nanocomposites was the same as that of the electrolyte solution without the nanocomposites. The nanocomposites was impregnated using an aqueous solution in which bismuthyl perchlorate (redox species), copper perchlorate, perchloric acid, sodium perchlorate, hydroquinone (electron mediator) and 2-buthyne-1,4-diol (leveling agent) were dissolved. The electronic paper was then prepared by sandwiching the nanocomposites between an indium-tin-oxide transparent electrode and a copper sheet. This electronic paper utilizes the reversible codeposition reaction of black Bi-Cu from bismuthyl perchlorate and copper(II) ions. The characteristics of this electronic paper were examined, and excellent characteristics with a white reflectivity of 65%, black reflectivity of 6.4%, contrast ratio of 10:1, operating life of over 1 × 10 6 cycles and open-circuit memory of at least 1 month were obtained. In addition, its driving voltage was 1.2 V, and the write time was 500 ms.

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Section: Introductionmentioning

confidence: 99%

Bismuth Electrochromic Device with High Paper-Like Quality and High Performances

Nakashima

Ebine

Shishikura

et al. 2010

ACS Appl. Mater. Interfaces

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Electrofluidic displays using Young–Laplace transposition of brilliant pigment dispersions

et al. 2009

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67.1: Active Matrix Electronic Paper with Silver Electrodeposition

Kokeguchi

Hakii

Kishinami

et al. 2008

Symp Digest of Tech Papers

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Electronic paper (3.5 inch & 113 ppi) driven by active‐matrix using silver electrodeposition has been developed. It has a reflectivity of at least 60%, and a contrast ratio of at least 20, resulting in realizing visibility equivalent to paper. By discovering a new halogen‐free silver salt electrolyte composition, driving stability, a gray color tone, and bi‐stability have been considerably improved.

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56.4: Naturally White Electrochromic Display Using Organic/Inorganic Nanocomposite Pulp

Cited by 3 publications

References 5 publications

Bismuth Electrochromic Device with High Paper-Like Quality and High Performances

Bismuth Electrochromic Device with High Paper-Like Quality and High Performances

Electrofluidic displays using Young–Laplace transposition of brilliant pigment dispersions

67.1: Active Matrix Electronic Paper with Silver Electrodeposition

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