Large-Area MXene Electrode Array for Flexible Electronics.

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 TiCT MXene electrode array on a flexible plastic substrate for application in high-performance OFETs. The work function of the TiCT MXene electrodes was also effectively modulated via chemical doping with NH. The fabricated OFETs with TiCT MXene electrodes exhibited excellent device performance, such as a maximum carrier mobility of ∼1 cm·V·s and an on-off current ratio of ∼10 for both ptype and ntype 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 ptype and ntype 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.