Date

Place

Room F (Room 320)
6. Flexible and Stretchable TFTs
August 19, 2015 (Wednesday)
09:00 ~ 10:15

[6-1]
09:00 ~ 09:25
Title:[Invited] Flexible Printed Organic TFT Device Arrays and Circuits
Shizuo Tokito, Kenjiro Fukuda, and Daisuke Kumaki (Yamagata Univ., Japan)
Abstract: Fully printed OTFT devices were successfully fabricated on a flexible plastic substrate using solution-processable organic semiconductors (OSC), silver nanoparticle inks and polymeric insulators. The printed OTFT devices using the new OSC showed excellent p-type electrical performance with a maximum mobility of 2 cm2/Vs. The subthreshold swings were small and current on/off ratios were over 107. The uniformity of the device performance within the panel was excellent. In particular, the deviations in threshold voltage were very small, which is ideal for display applications.?Ultra-thin OTFT devices can be fabricated using an?ultra-thin parylene-C films. The resulting ultra-thin printed OTFT devices and inverter circuits were extremely lightweight, flexible and compressible. Virtually?no changes were observed in the electrical?characteristics, even under 50% compression.?We also attempted to fabricate pseudo-CMOS inverters by using only p-type printed OTFT devices. The fabricated inverter showed a typical transfer curve with a high gain of 35 at 20 V. Logic circuits such as NAND and NOR circuits based on the pseudo-CMOS were also successfully fabricated and exhibited ideal characteristics. Furthermore, a more complicate circuit (1-bit flip-flop) using the pseudo-CMOS logic was fabricated.?
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