Molecular modeling of Nano bio p-i-n FET

We propose a gate-controlled first principle approach based bio-molecular Nano p-i-n Field Effect Transistor (FET). Density Functional Theory conjugated with Non Equilibrium Green´s Function has been applied to design this bio-molecular FET in atomic scale region. The device length is 19.618Å and this bio-molecular chain is made with two Adenine molecules and two Thymine molecules, which is attached with two electrodes made with Platinum and this device is wrapped with di-electric region and metallic cylindrical gate. This model has been activated in forward and reverse bias region, hence conducts satisfactory current in both n and p regions. Transmission spectrum, Device Density of States, Current-Voltage characteristics and Quantum Transport Co-efficients of this device has been analyzed. To achieve faster transmission the molecular device is passivated with Hydrogen atoms. The current-voltage characteristics model shows this device can act as bio-molecular n-channel and p-channel FET. Quantum Transport co-efficients like Peltier-co-efficients and Seebeck coefficients are calculated in this paper by solving Poisson´s equations self consistent function method. In this model, opposite electrical charge doping procedure has been introduced in two electrodes which makes possible to create n and p regions at the two ends of the intrinsic bio-molecular chain.