Design and Parametric Analysis of Charge Plasma Junctionless TFET for Biosensor Applications

Abstract

This paper presents a new design of charge plasma junctionless tunnel field effect transistor (CP JLTFET) with improved ON current, surface potentials. For the ease of fabrication, source and drain regions are induced in intrinsic silicon material using proper metal workfunctions. The rate of tunneling of electrons is found more in case of proposed CP JLTFET. The cavity length is varied between 8 nm and 10 nm and different dielectric constants have been used. This increased the ON state performance of device i.e ON drive current, potential and electric field. The increase in tunneling of electrons is mainly due to high recombination of carriers in the channel region. The proposed device simulated their electrical parameters like drain current, surface potentials, electric field, and energy bands with different dielectric constants. These excellent performance parameters of the proposed device with an appropriate material can be used for sensing application of biomolecules by introducing a cavity in the device.

Keywords

• Charge plasma
• dielectric modulation tunnel FET
• biosensor
• biomolecule sensitivity