This work introduces a simulation-driven framework for reliably reproducing experimental trends pertaining to two-dimensional thin films, thus rendering advanced heterostructure research feasible for facilities without sophisticated equipments. Zhang and his colleagues fabricated a molybdenum disulfide (MoS2) device in a ground-signal-ground (G-S-G) configuration and derived its equivalent electrical circuit. This research simulates a MoS2-graphene based coplanar transmission line (CPTL) in a G-S-G configuration using Ansys HFSS. Thereafter an accurate equivalent electrical model circuit was designed and calculated for its hetero-junction device using Advance Design System simulator. For validation the characteristic curves of the simulated and modeled devices are compared with the measurements obtained for the metallic MoS2 proposed by Zhang and his colleagues, which are used in this study for validation purposes rather than as a foundation for the proposed model. The validation results confirms that the proposed simulation method can consistently replicate experimental trends. Furthermore, the effect of the combined properties of MoS2 and graphene on performance is evaluated based on S-parameters, and its high-frequency behavior is assessed through scattering parameter analysis (S11, S21), particularly at 5.9 GHz. Among the four different configurations assessed in this study, the one with the graphene monolayer positioned on the source side of the MoS2 signal line exhibited improved high-frequency performance in terms of I–V and C–V characteristics, as well as a low parasitic effect. Therefore, it can potentially be utilized in future devices and next-generation Wi-Fi spectra.
Thapa et al. (Sun,) studied this question.