Dielectric Characteristics and Electrical Conductivity Behavior of Graphene/Al2O3/p-silicon Structure

Abstract Graphene nanosheets (Gns) obtained by the chemical vapor deposition (CVD) method have been employed for the fabrication of Graphene/Al2O3/p-silicon structure. The Raman, scanning-electron- microscopy (SEM) and transmission-electron-microscopy (TEM) have been used to analyze the morphology and structural features of the graphene nanosheet. The dielectric features and electrical-conductivity of Graphene/Al2O3/p-silicon have been studied in the frequency range 10 kHz to 400 kHz and in the voltage range, –4 to +4 V at 300 K. The obtained experimental outcomes imply that electrical conductivity and dielectric features of Graphene/Al2O3/p-silicon were found out to be powerful functions of frequency and applied bias voltage. It can be seen that almost all of the interface states between metal and silicone contribute to modify of dielectric features of Graphene/Al2O3/p-silicon structure.