High-performance and self-rectifying resistive random access memory based on SnO2 nanorod array: ZnO nanoparticle structure

To develop high-density memory arrays, a self-rectifying resistive random access memory based on a Cu/SnO2 nanorod array: ZnO nanoparticle (NP)/fluorine-doped tin oxide (FTO) structure is proposed to avoid the sneak current. The proposed device exhibits transparent property and significant merits including high ON/OFF ratio, conspicuous endurance and superior data retention. A carrier transport model based on a SnO2/FTO Schottky barrier, ZnO NP trap effect and Cu filament is proposed to explain the self-rectifying resistive switching performance. This work provides a new method to effectively avoid sneak current and also shows promising prospects in constructing high-performance transparent memory arrays. (C) 2019 The Japan Society of Applied Physics