Abstract
In this work, Schottky diodes based on amorphous indium–gallium–zinc–oxide (IGZO) are fabricated on a cellulose microfiber paper substrate. Silver lines used as the Schottky barrier are printed, in parallel with the thermally evaporated ohmic Cr/Au contact, using a dispense printer. The morphological and electrical properties of the devices are presented. The fabricated diodes achieve rectification ratios from 3.4 to 34.9 at ± 1 V with ON voltage ranging from 1.1 V to 1.4 V and device lengths (Ag/Au spacing) from 145 µm to 894 µm. The diodes are characterized in a temperature range of 25 oC to 80 oC. The device shows a decrease in ON current with increasing temperature, mainly due to the change of the cellulose microstructure. In fact, an opposite behavior of the ON current was observed when the diode was realized on a polyimide substrate. The proposed paper-based flexible diode offers a promising choice for printed environmentally-friendly electronics.