Tuning the Polarity of MoTe(2) FETs by Varying the Channel Thickness for Gas-Sensing Applications

In this study, electrical characteristics of MoTe(2) field-effect transistors (FETs) are investigated as a function of channel thickness. The conductivity type in FETs, fabricated from exfoliated MoTe(2) crystals, switched from p-type to ambipolar to n-type conduction with increasing MoTe(2) channel...

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Autores principales: Rani, Asha, DiCamillo, Kyle, Khan, Md Ashfaque Hossain, Paranjape, Makarand, Zaghloul, Mona E.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6603731/
https://www.ncbi.nlm.nih.gov/pubmed/31167486
http://dx.doi.org/10.3390/s19112551
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author Rani, Asha
DiCamillo, Kyle
Khan, Md Ashfaque Hossain
Paranjape, Makarand
Zaghloul, Mona E.
author_facet Rani, Asha
DiCamillo, Kyle
Khan, Md Ashfaque Hossain
Paranjape, Makarand
Zaghloul, Mona E.
author_sort Rani, Asha
collection PubMed
description In this study, electrical characteristics of MoTe(2) field-effect transistors (FETs) are investigated as a function of channel thickness. The conductivity type in FETs, fabricated from exfoliated MoTe(2) crystals, switched from p-type to ambipolar to n-type conduction with increasing MoTe(2) channel thickness from 10.6 nm to 56.7 nm. This change in flake-thickness-dependent conducting behavior of MoTe(2) FETs can be attributed to modulation of the Schottky barrier height and related bandgap alignment. Change in polarity as a function of channel thickness variation is also used for ammonia (NH(3)) sensing, which confirms the p- and n-type behavior of MoTe(2) devices.
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spelling pubmed-66037312019-07-17 Tuning the Polarity of MoTe(2) FETs by Varying the Channel Thickness for Gas-Sensing Applications Rani, Asha DiCamillo, Kyle Khan, Md Ashfaque Hossain Paranjape, Makarand Zaghloul, Mona E. Sensors (Basel) Article In this study, electrical characteristics of MoTe(2) field-effect transistors (FETs) are investigated as a function of channel thickness. The conductivity type in FETs, fabricated from exfoliated MoTe(2) crystals, switched from p-type to ambipolar to n-type conduction with increasing MoTe(2) channel thickness from 10.6 nm to 56.7 nm. This change in flake-thickness-dependent conducting behavior of MoTe(2) FETs can be attributed to modulation of the Schottky barrier height and related bandgap alignment. Change in polarity as a function of channel thickness variation is also used for ammonia (NH(3)) sensing, which confirms the p- and n-type behavior of MoTe(2) devices. MDPI 2019-06-04 /pmc/articles/PMC6603731/ /pubmed/31167486 http://dx.doi.org/10.3390/s19112551 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Rani, Asha
DiCamillo, Kyle
Khan, Md Ashfaque Hossain
Paranjape, Makarand
Zaghloul, Mona E.
Tuning the Polarity of MoTe(2) FETs by Varying the Channel Thickness for Gas-Sensing Applications
title Tuning the Polarity of MoTe(2) FETs by Varying the Channel Thickness for Gas-Sensing Applications
title_full Tuning the Polarity of MoTe(2) FETs by Varying the Channel Thickness for Gas-Sensing Applications
title_fullStr Tuning the Polarity of MoTe(2) FETs by Varying the Channel Thickness for Gas-Sensing Applications
title_full_unstemmed Tuning the Polarity of MoTe(2) FETs by Varying the Channel Thickness for Gas-Sensing Applications
title_short Tuning the Polarity of MoTe(2) FETs by Varying the Channel Thickness for Gas-Sensing Applications
title_sort tuning the polarity of mote(2) fets by varying the channel thickness for gas-sensing applications
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6603731/
https://www.ncbi.nlm.nih.gov/pubmed/31167486
http://dx.doi.org/10.3390/s19112551
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