Suspended MoTefield effect transistors with ionic liquid gate

W. R. Choi, J. H. Hong, Y. G. You, E. E.B. Campbell, S. H. Jhang*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

The electrical performance of suspended few-layer MoTe2 field-effect-transistors with ionic liquid gating has been investigated. The suspended structure not only enhances the mobility of MoTe2 by removing the influence of the substrate but also allows ions to accumulate on both the top and the bottom surface of MoTe2. The consequent increase in the gate capacitance resulted in an improved subthreshold swing (∼73 mV/dec) and on-off ratio (106) at room temperature for suspended MoTe2 compared to substrate-supported devices. Suspended transistors with ionic liquid gating enable a larger charge density compared to ionic liquid gated supported devices and may provide a useful platform to study screening physics in 2D materials.

Original languageEnglish
Article number223105
JournalApplied Physics Letters
Volume119
Issue number22
Early online date1 Dec 2021
DOIs
Publication statusE-pub ahead of print - 1 Dec 2021

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