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Materials 2011, 4(12), 2171-2182; doi:10.3390/ma4122171

Electrochromic Type E-Paper Using Poly(1H-Thieno[3,4-d]Imidazol-2(3H)-One) Derivatives by a Novel Printing Fabrication Process

1,* , 2
1 Kuraray America, Inc., 11500 Bay Area Boulevard, Pasadena, TX 77507, USA 2 Tsukuba Research Center, Kuraray Co. Ltd., 41 Miyukigaoka, Tsukuba, Ibaraki 305-0841, Japan
* Author to whom correspondence should be addressed.
Received: 8 October 2011 / Revised: 8 December 2011 / Accepted: 9 December 2011 / Published: 14 December 2011
(This article belongs to the Special Issue Electrochromic Materials and Devices)
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In this study, we report poly(1H-thieno[3,4-d]imidazol-2(3H)-one) (pTIO) derivatives for an electrochromic (EC) type e-paper and its novel printing fabrication process. pTIO is a kind of conductive polymer (CP) s which are known as one of the EC materials. The electrochromism of pTIO is unique, because its color in doped state is almost transparent (pale gray). A transparent state is required to show a white color in a see-through view of an EC type e-paper. An electrochromism of CP has a good memory effect which is applicable for e-paper. The corresponding monomers of CP are able to be polymerized with an electrochemical method, which be made good use of for the fabrication process of e-paper. pTIO derivatives are copolymerized with other pi-conjugated X unit, which adjusts the color of electrochromism. Finally, we fabricated a segment matrix EC display using pTIO derivatives by ink-jet printing.
Keywords: electronic papers; conductive polymers; printable electronics electronic papers; conductive polymers; printable electronics
This is an open access article distributed under the Creative Commons Attribution License (CC BY) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Kondo, Y.; Tanabe, H.; Kudo, H.; Nakano, K.; Otake, T. Electrochromic Type E-Paper Using Poly(1H-Thieno[3,4-d]Imidazol-2(3H)-One) Derivatives by a Novel Printing Fabrication Process. Materials 2011, 4, 2171-2182.

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