Enhanced low power, multistate, unipolar stable RRAM devices with MoS2-rGO hybrids
摘要
Resistive random-access memory (RRAM) is a potential next-generation memory technology, known for its large storage and efficient switching. In this work, flexible 2D materials viz. MoS2 and reduced graphene oxide (rGO) are explored for RRAM applications. MoS2 offers excellent switching characteristics and stability, while rGO improves conductivity and facilitates charge transport. The synergy between MoS2 and rGO structures results in lower power consumption, reliable resistive switching, and enhanced endurance. The novelty in the work is related to the material property correlation with the resistive switching behavior of rGO and MoS2-rGO-based active layer RRAM devices. Based on material analysis conducted on hydrothermally synthesized pure MoS2, rGO and hybrid MoS2-rGO, MoS2-rGO4.5 hybrid material with higher weight percentage of rGO is chosen as hybrid active layer for RRAM, on account of its well-formed morphology with strong chemical binding. The electrical performance of spin-coated RRAM device with hybrid MoS2-rGO4.5 and pure rGO as active layer are evaluated and compared. The fabricated hybrid Ag/MoS2-rGO4.5/ITO RRAM devices show novel unipolar resistive switching behavior with multistate characteristics, resulting in better performance with enhanced ION/IOFF of 479 at low VSET of 0.97 V, making it suitable for low power high-storage memory applications.