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Displays from Transparent Films of Natural Nanofibers

Published online by Cambridge University Press:  31 January 2011

Antonio Norio Nakagaito ,
Masaya Nogi  and
Hiroyuki Yano
Antonio Norio Nakagaito
Affiliation:
Department of Chemistry and Biotechnology, Graduate School of Engineering Tottori University, 4-101 Koyama-cho Minami, Tottori; Japan; tel. and fax 81(857) 31-5592; and e-mail nakagaito@rish.kyoto-u.ac.jp. (e-mail starting April 2010: norio.rm@gmail.com).
Masaya Nogi
Affiliation:
Department of Advanced Interconnection Materials, Institute of Science and Industrial Research, Osaka University, Ibaraki, Osaka 567-0047, Japan; tel. 81-6-6879-8521; fax 81-6-6879-8522; and e-mail nogi@eco.sanken.osaka-u.ac.jp.
Hiroyuki Yano
Affiliation:
Laboratory of Active Bio-Based Materials, Research Institute of Sustainable Humanosphere, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan; tel. and fax 81-0774-38-3669; and e-mail yano@rish.kyoto-u.ac.jp.
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Abstract

Organic light-emitting diodes bring a whole new level of image quality, power consumption, and very thin profiles to displays. In addition, with the appropriate choice of a flexible substrate, paper-like flexible displays that are lightweight, robust, and conformable can be produced. This will make it possible to roll or fold the displays for portability or incorporate them in clothing as wearable displays. Plastic substrates are considered prospective materials due to their inherent flexibility and optical qualities. However, one of the major drawbacks of plastics is the large thermal expansion. The thermal expansion of the substrate has to be compatible with those of the layers deposited on it, otherwise these layers will become strained and crack during the thermal cycling involved in the display manufacture. One of the proposed solutions to reduce the thermal expansion of plastics without appreciable loss in transparency is to reinforce them with nanofibers. These nanofibers are already available in enormous quantities in nature, in the form of cellulose, with the caveat that they have to be extracted properly. Here we present the methodologies required to obtain the cellulose nanofibers and to produce optically transparent composites for use in flexible displays.

Type
Research Article
Information
MRS Bulletin , Volume 35 , Issue 3: Materials from Renewable Resources , March 2010 , pp. 214 - 218
Copyright
Copyright © Materials Research Society 2010

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