Artificial Synapse Emulated through Fully Aqueous Solution-Processed Low-Voltage In2O3 Thin-Film Transistor with Gd2O3 Solid Electrolyte

Brain-like neuromorphic computing system provides an alternative approach for the future computer for its characteristics of high-efficiency, power-efficient, self-learning, and parallel computing. Therefore, the imitation of synapse behavior based on microelectronics is particularly important. Recently, the synaptic transistors have received widespread attention. Among them, solid oxide-based synaptic transistors are more compatible with the large-scale fabrication than the liquid and organic-based transistors. So the development of oxide synaptic transistor is required. Here, a novel aqueous solution-processed Gd2O3 is suggested to be the solid electrolyte for synaptic transistors. The microstructure and the dielectric properties of Gd2O3 film are investigated, which show the potential for the simulation of synaptic transmission. Then, the fully aqueous solution-processed In2O3/Gd2O3 thin-film transistor (TFT) is fabricated. The device exhibits an acceptable electrical performance with a small threshold...