Large-Area MXene Electrode Array for Flexible Electronics.
basic_science · Level V
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- Record sourced from PubMed, PMID 31553884.
- Also identified by DOI 10.1021/acsnano.9b04731.
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Abstract
MXenes, an emerging class of two-dimensional (2D) transition metal carbides and nitrides, have potential for application as high-performance, low-cost electrodes in organic field-effect transistors (OFETs) because of their water dispersibility, high conductivity, and work-function tunability. In this study, we successfully fabricated a large-scale, uniform Ti<sub>3</sub>C<sub>2</sub>T<sub><i>x</i></sub> MXene electrode array on a flexible plastic substrate for application in high-performance OFETs. The work function of the Ti<sub>3</sub>C<sub>2</sub>T<sub><i>x</i></sub> MXene electrodes was also effectively modulated via chemical doping with NH<sub>3</sub>. The fabricated OFETs with Ti<sub>3</sub>C<sub>2</sub>T<sub><i>x</i></sub> MXene electrodes exhibited excellent device performance, such as a maximum carrier mobility of ∼1 cm<sup>2</sup>·V<sup>-1</sup>·s<sup>-1</sup> and an on-off current ratio of ∼10<sup>7</sup> for both p<i>-</i>type and n<i>-</i>type OFETs, even though all the electrode and dielectric layers were fabricated on the plastic substrate by solution processing. Furthermore, MXene-electrode-based complementary logic circuits, such as NOT, NAND, and NOR, were fabricated via integration of p<i>-</i>type and n<i>-</i>type OFETs. The proposed approach is expected to expand the application range of MXenes to other OFET-based electronic devices, such as organic light-emitting displays and electronic skins.