Printed, Sub-3V Digital Circuits on Plastic from Aqueous Carbon Nanotube Inks

Ha, Mingjing and Xia, Yu and Green, A A and Zhang, Weili and Renn, Mike J and Kim, Chris H and Hersam, Mark H and Frisbie, C Daniel. (2010) Printed, Sub-3V Digital Circuits on Plastic from Aqueous Carbon Nanotube Inks. ACS Nano, 4 (8). pp. 4388-4395. ISSN 1936-086X

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Printing electronic components on plastic foils with functional liquid inks is an attractive approach for achieving flexible and low-cost circuitry for applications such as bendable displays and large-area sensors. The challenges for printed electronics, however, include characteristically slow switching frequencies and associated high supply voltages, which together impede widespread application. Combining printable high-capacitance dielectrics with printable high-mobility semiconductors could potentially solve these problems. Here we demonstrate fast, flexible digital circuits based on semiconducting carbon nanotube (CNT) networks and high-capacitance ion gel gate dielectrics, which were patterned by jet printing of liquid inks. Ion gel-gated CNT thin-film transistors (TFTs) with 50 μm channel lengths display ambipolar transport with electron and hole mobilities >20 cm2/V·s; these devices form the basis of printed inverters, NAND gates, and ring oscillators on both polyimide and SiO2 substrates. Five-stage ring oscillators achieve frequencies >2 kHz at supply voltages of 2.5 V, corresponding to stage delay times of 50 μs. This performance represents a substantial improvement for printed circuitry fabricated from functional liquid inks.

Item Type: Article
Additional Information: Abstract reprinted with permission. Copyright 2010 American Chemical Society.
Uncontrolled Keywords: printed electronics; flexible electronics; thin-film transistor; ion gel; ambipolar; delay time
InterNano Taxonomy: Nanoscale Objects and Nanostructured Materials > Nanocomposites > Thin films
Nanomanufacturing Processes > Nanopatterning/Lithography > 3D lithography
Areas of Application > Electronics and Semiconductor Industries
Nanoscale Objects and Nanostructured Materials > Nanotubes > Carbon nanotubes
Collections: Nanomanufacturing Research Collection
Related URLs:
Depositing User: Rebecca Reznik-Zellen
Date Deposited: 08 Sep 2010 16:34
Last Modified: 19 Sep 2011 21:29

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