Lateral-Coupled Junctionless IZO-Based Electric-Double-Layer Thin-Film Transistors Gated by Solid-State Phosphosilicate Glass Electrolyte

We describe the lateral-coupled junctionless indium-zinc-oxide (IZO) thin-film transistors (TFTs) in which there are no junctions between channel and source/drain electrodes and with solid-state phosphosilicate glass electrolyte (PSG) gating. Due to the three-dimensional high proton conduction and lateral coupled electric-double-layer (EDL) capacitance (> 1 mu F/cm(2)) of the PSG, the low voltage (2.0 V) junctionless IZO TFTs and the dual coplanar gate devices are obtained. An AND logic function is demonstrated on the basis of the junctionless EDL-TFTs. Such devices are promising for applications in pH sensors, humidity sensors, biosensors, and neuron network simulation.