First Principle-based Analysis of Single-Walled Carbon Nanotube and Silicon Nanowire Junctionless Transistors

Autor: Ansari, Lida, Feldman, Baruch, Fagas, Giorgos, Lacambra, Carlos Martinez, Haverty, Michael G., Kuhn, Kelin J., Shankar, Sadasivan, Greer, James C.
Rok vydání: 2013
Předmět:
Zdroj: IEEE Trans. Nanotechnol., 12, 1075, Nov. 2013
Druh dokumentu: Working Paper
DOI: 10.1109/TNANO.2013.2279424
Popis: Junctionless transistors made of silicon have previously been demonstrated experimentally and by simulations. Junctionless devices do not require fabricating an abrupt source-drain junction and thus can be easier to implement in aggressive geometries. In this paper, we explore a similar architecture for aggressively scaled devices with the channel consisting of doped carbon nanotubes (CNTs). Gate all around (GAA) field effect transistor (FET) structures are investigated for n- and p-type doping. Current-voltage characteristics and sub-threshold characteristics for a CNTbased junctionless FET is compared with a junctionless silicon nanowire (SiNW) FET with comparable dimensions. Despite the higher on-current of the CNT channels, the device characteristics are poorer compared to the silicon devices due to the smaller CNT band gap.
Databáze: arXiv