Development of materials and printing methods for fabrication of thin-film transistors on flexible substrates

Abstract

In this study, we developed a valid method to fabricate all-printed functionalized CoMoCat 76 SCNT thin film transistors (TFTs) on PET substrates via a suite of printing technologies. The printing methods we investigated include inkjet printing, aerosol jet printing and a hybrid with nanoimprinting. Source and drain electrodes were first fabricated on flexible substrates by a hybrid printing of nanosilver ink, and then SCNT thin films were deposited on the channel of TFT devices by ink-jet printing. Subsequently, the side-gate electrode and ion gel dielectric layer were deposited by aerosol jet printing of nanosilver ink. The all-printed flexible TFTs exhibited the effective mobility up to 1.3 cm^{<font size="2">2</font>}V^{<font size="2">-1</font>}S^{<font size="2">-1</font>} and on/off ratio up to 2&times;10^{<font size="2">3</font>}. This work opens a way to fabricate scalable all-printed flexible electronics