Open AccessHigh dielectric material dependence of carbon nanotube field effect transistor considering non‐ballistic conduction
Author(s) -
Rouf Nirjhor Tahmidur,
Deep Ashfaqul Haq,
Hassan Rusafa Binte,
Khan Sabbir Ahmed,
Hasan Mahmudul,
Mominuzzaman Sharif Mohammad
Publication year - 2014
Publication title -
micro and nano letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.25
H-Index - 31
ISSN - 1750-0443
DOI - 10.1049/mnl.2014.0268
Subject(s) - transconductance , materials science , dielectric , carbon nanotube , high κ dielectric , capacitance , optoelectronics , gate dielectric , subthreshold slope , transistor , carbon nanotube field effect transistor , field effect transistor , ballistic conduction , condensed matter physics , electron , electrical engineering , nanotechnology , voltage , physics , engineering , electrode , quantum mechanics
As a result of this reported research, a simulation model to analyse the behaviour of carbon nanotube field effect transistors (CNTFETs) under non‐ballistic conditions is explained and the effect of gate dielectric on the performance of CNTFETs has been explored in detail. For the first time, a thorough study of the combined non‐ballistic effect on the performance of CNTFETs has been conducted and the output of the device has been analysed. It has been observed that a gate material with a high dielectric constant leads to higher on‐state current and higher on and off state current ratio. In addition, the transconductance, total capacitance, charging energy, subthreshold swing ( S ), drain‐induced barrier lowering (DIBL) and gain with respect to the dielectric constant have been observed and analysed. Transconductance and total capacitance increases by a significant amount, while charging energy and S decrease as the dielectric value increases. The DIBL and gain vary slightly as a higher value dielectric material is used as a gate. Furthermore, the results of this study have been plotted against previously reported ballistic outputs to provide a better perception of the deviation from ideal behaviour. At the same time, the outcomes of this analysis have been compared against some reported experimental values.