Resistive switching behaviour of multi-stacked PVA/graphene oxide plus PVA composite/PVA insulating layer-based RRAM devices

Abstract

In this study, we have investigated the resistive switching behavior of multi-stacked PVA/GO + PVA composite/PVA insulating layer-based RRAM (resistive random-access memory) as the annealing temperature of the insulating layer was varied between 100 degrees C, 150 degrees C, and 200 degrees C. The fabricated RRAM device with a multi-stacked insulating layer annealed at 200 degrees C showed relatively good switching properties with a high on/off ratio (similar to 10(4)) and low V-SET (3.5 +/- 0.29 V) and V-RESET (-1.81 +/- 0.10 V), which were uniformly distributed over 100 DC sweep cycles. In terms of reliability, multi-stacked insulating layer-based RRAM devices exhibited good retention (>2 x 10(3) s) and DC sweep endurance (>80) due to the enhanced stability of the insulating layer by good dispersion and the thermal treatment. The conduction mechanisms of the device at low resistance state (LRS) and high resistance state (HRS) were analyzed through Ohmic conduction LRS and Poole-Frenkel emission of HRS, respectively. In addition, we demonstrated the filamentary switching mechanism of resistive switching in our proposed devices.