Multifunctional Logic Demonstrated in a Flexible Multigate Oxide‐Based Electric‐Double‐Layer Transistor on Paper Substrate

Paper electronics represents a newly raised concept that includes various types of electronic devices and circuits on paper. In this work, the authors report multigate oxide-based homojunction electric-double-layer thin-film transistors (TFTs) with cellulose nanofibers electrolyte film as the gate dielectrics on paper substrate. These flexible TFTs exhibit high performance with a high ON/OFF ratio of 107 and a high mobility of around 26 cm2 V−1 s−1. Resistor-loaded inverters are demonstrated both in a bottom-gate mode and an in-plane-gate mode. Logic AND operation is realized in a device with two in-plane gates. Significantly, the universal logic NAND is experimentally demonstrated using a one transistor/one resistor structure by combining NOT and AND logics together. The paper-based TFT devices are very interesting for emerging areas such as disposable paper electronics and sensors.