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High Speed Roll-to-Roll Printable Transistor Enabled by a Pulsed Light Curable CNT Ink

1
Department of Electrical and Computer Engineering, Cockrell School of Engineering, University of Texas, Austin, TX 78712, USA
2
Omega Optics, Austin, TX 78757, USA
3
Department of Electrical and Computer Engineering, Boise State University, Boise, ID 83706, USA
*
Authors to whom correspondence should be addressed.
These authors contributed equally to this work.
J. Manuf. Mater. Process. 2019, 3(2), 33; https://doi.org/10.3390/jmmp3020033
Received: 25 March 2019 / Revised: 8 April 2019 / Accepted: 10 April 2019 / Published: 16 April 2019
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Abstract

This paper reports the first high speed roll-to-roll printable transistor using a carbon nanotube (CNT) semiconducting layer. The transistor is made possible through the development of a pulsed light curable CNT ink compatible with typical drop on demand inkjet cartridges. This CNT ink uses a xylene based solvent with methanol, glycerin, and Triton X-100 modifiers to create an evaporable solution with appropriate absorption spectra for a mercury or xenon flash lamp with strong energy transmission in the UVB to mid visible light range, allowing the solution to absorb the energy from the flash lamp and evaporate. Transistor dimensions were defined by the capabilities of a typical roll-to-roll drop on demand cartridge. The final device demonstrated an on/off ratio of 104, representing performance similar to gravure printed devices. This represents the first CNT ink which can be used in high speed production methods without long thermal curing steps in the workflow. View Full-Text
Keywords: flexible printed circuits; carbon nanotubes; semiconductor nanotubes; production engineering flexible printed circuits; carbon nanotubes; semiconductor nanotubes; production engineering
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Grubb, P.M.; Mokhtari Koushyar, F.; Lenz, T.; Asghari, A.; Gan, G.; Xia, W.; Dalir, H.; Subbaraman, H.; Chen, R.T. High Speed Roll-to-Roll Printable Transistor Enabled by a Pulsed Light Curable CNT Ink. J. Manuf. Mater. Process. 2019, 3, 33.

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