Enhanced field-emission behavior of layered MoS₂ sheets

Ranjit V Kashid; Dattatray J Late; Stanley S Chou; Yi-Kai Huang; Mrinmoy De; Dilip S Joag; Mahendra A More; Vinayak P Dravid

doi:10.1002/smll.201300002

Enhanced field-emission behavior of layered MoS₂ sheets

Small. 2013 Aug 26;9(16):2730-4. doi: 10.1002/smll.201300002. Epub 2013 Feb 21.

Authors

Ranjit V Kashid¹, Dattatray J Late, Stanley S Chou, Yi-Kai Huang, Mrinmoy De, Dilip S Joag, Mahendra A More, Vinayak P Dravid

Affiliation

¹ Center for Advanced Studies in Material Science and Condensed Matter Physics, Department of Physics, University of Pune, Pune 411007, India.

PMID: 23427106
DOI: 10.1002/smll.201300002

Abstract

Field emission studies are reported for the first time on layered MoS₂ sheets at the base pressure of ∼1 × 10⁻⁸ mbar. The turn-on field required to draw a field emission current density of 10 μA/cm² is found to be 3.5 V/μm for MoS₂ sheets. The turn-on values are found to be significantly lower than the reported MoS₂ nanoflowers, graphene, and carbon nanotube-based field emitters due to the high field enhancement factor (∼1138) associated with nanometric sharp edges of MoS₂ sheet emitter surface. The emission current-time plots show good stability over a period of 3 h. Owing to the low turn-on field and planar (sheetlike) structure, the MoS₂ could be utilized for future vacuum microelectronics/nanoelectronic and flat panel display applications.

Keywords: MoS2; field emission; field enhancement factors; layered materials.

Publication types

Research Support, Non-U.S. Gov't