Current Enhancement of Green Transistors Compared with Conventional Tunnel Field-Effect Transistors

Abstract

P-type tunneling-based high-driving-current green field-effect transistors (p-gFETs) with dopant segregation (DS) on bulk Si were successfully fabricated and developed. gFETs with the vertical band-to-band tunneling (BTBT) mechanism have a valid benefit for ∼25× ON current enhancement compared with tunneling field-effect transistors (TFETs) without sacrificing leakage current and subthreshold swing for CMOS scaling in future-generation transistors. Ni DS enhanced the amount of n+ dopant in the source/drain region and produced a steep junction profile, which improved the BTBT mechanism. The promising gFET with silicon-on-insulator-free (SOI-free) gFET can be compatible with current processes and solve the issues of cost and thermal dissipation.