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Proceedings Paper

Large-area stretchable organic transistor integrated circuits for sensor and display applications
Author(s): Tsuyoshi Sekitani; Takao Someya
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Paper Abstract

Stretchability significantly expands the scope of electronic applications-particularly large-area electronics such as displays, sensors, and actuators-because stretchable electronics can cover arbitrary surfaces and movable parts, which is impossible with conventional electronics. However, the realization of stretchable electronics for the manufacturing of electrical wiring with high conductivity, high stretchability, and large-area compatibility is a major hurdle. We manufactured printable elastic conductors comprising single-walled carbon nanotubes (SWNTs) uniformly dispersed in fluorinated rubber. Using ionic liquid and jet milling, we produced longer and finer SWNT bundles that formed well-developed conducting networks in rubber. A conductivity and stretchability greater than 100 S/cm and 100%, respectively, were obtained. In order to demonstrate the feasibility of the elastic conductors for electrical wiring, we manufactured a rubber-like large-area organic transistor active matrix comprising printed organic transistors and elastic conductors. The effective area of the matrix was 20 × 20 cm2. The active matrix sheet was uniaxially and biaxially stretched to 70% without incurring mechanical or electrical damage. Furthermore, we constructed a rubber-like stretchable active matrix display comprising integrated printed elastic conductors, organic transistors, and organic light-emitting diodes. The display could stretch by 30-50% and spread over a hemisphere without being mechanically or electrically damaged.

Paper Details

Date Published: 27 August 2009
PDF: 15 pages
Proc. SPIE 7418, Organic Semiconductors in Sensors and Bioelectronics II, 74180Q (27 August 2009); doi: 10.1117/12.826576
Show Author Affiliations
Tsuyoshi Sekitani, The Univ. of Tokyo (Japan)
Takao Someya, The Univ. of Tokyo (Japan)

Published in SPIE Proceedings Vol. 7418:
Organic Semiconductors in Sensors and Bioelectronics II
Ruth Shinar; George G. Malliaras, Editor(s)

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