High-resolution organic field-effect transistors manufactured by electrohydrodynamic inkjet printing of doped electrodes

Electrohydrodynamic inkjet (E-jet) printing is a promising technology to fabricate high-performance organic electronic devices due to its high resolution, low-cost and drop-on-demand characteristics. Here, we fabricate top-contact OFETs by using E-jet printed source/drain electrodes. The printed resolution could be smaller than 5 mu m on an organic semiconductor. A printable Ag ink consisting of the F4-TCNQ additive greatly improves the charge injection of the OFET, and thus the OFETs show comparable performance with thermally evaporated electrodes. The printing and doping of top electrodes can be realized in one step, which is essential to realize fully printed organic devices. The E-jet printing demonstrates its potential in high-resolution, high-performance OFET applications.