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Printable carbon nanotube-based elastic conductors for fully-printed sub-1 V stretchable electrolyte-gated transistors and inverters

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Abstract

Single-walled carbon nanotube (SWCNT)-based hybrid gel electrodes were fabricated for fully printed stretchable thin-film transistors and inverters operating at very small voltages (below 1 V). Printable and stretchable electrodes were fabricated by supplementing electrically conductive SWCNTs in rubbery polymer electrolytes, known as ionic gels. To fabricate stretchable electronic circuits, SWCNT-based stretchable source and drain electrodes as well as semiconductors, gate dielectrics, gate electrodes (either conducting polymer or SWCNT-based hybrid electrode) and load resistors were directly deposited by spray printing at low temperatures (≤130 °C). Fully printed electrolyte-gated transistors (EGTs) based on SWCNT hybrid electrodes turned on and off at low operation voltages below 1 V and the devices showed low hysteresis with reasonably high on/off current ratios on polymer and paper substrates. In addition, stretchable side-gated coplanar transistors were successfully demonstrated on a rubber substrate, which exhibited reliable electrical characteristics even at a strain of 100%. An array of resistor-loaded stretchable inverters was also fabricated by spray-printing EGTs and CNT-based resistors. The resulting inverters exhibited appropriate voltage-inverting characteristics at different tensile strains and the shift in inversion voltage was in a very small Vin range of 0.1 V. These results demonstrate that the hybrid gel-type electrodes are promising for the fabrication of low-voltage stretchable all-printed transistors and electronic circuits.

Graphical abstract: Printable carbon nanotube-based elastic conductors for fully-printed sub-1 V stretchable electrolyte-gated transistors and inverters

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Supplementary files

Article information


Submitted
19 Nov 2019
Accepted
31 Jan 2020
First published
03 Feb 2020

J. Mater. Chem. C, 2020, Advance Article
Article type
Paper

Printable carbon nanotube-based elastic conductors for fully-printed sub-1 V stretchable electrolyte-gated transistors and inverters

K. G. Cho, Y. K. Kwon, S. S. Jang, K. H. Seol, J. H. Park, K. Hong and K. H. Lee, J. Mater. Chem. C, 2020, Advance Article , DOI: 10.1039/C9TC06347A

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