Screen-printed Source and Drain Electrodes for Inkjet-processed Zinc-tin-oxide Thin-film Transistor

Abstract

Screen-printed source and drain electrodes were used for a spin-coated and inkjet-processed zinc-tin oxide (ZTO) TFTs for the first time. Source and drain were silver nanoparticles. Channel length was patterned using screen printing technology. Different silver nanoinks and process parameters were tested to find optimal source and drain contacts Relatively good electrical properties of a screen-printed inkjet-processed oxide TFT were obtained as follows; a mobility of 1.20 <TEX>$cm^2$</TEX>/Vs, an on-off current ratio of <TEX>$10^6$</TEX>, a Vth of 5.4 V and a subthreshold swing of 1.5 V/dec.