Accession Number : AD1031473

Title :   Effects of Growth Conditions on the Measured Electrical Properties of Monolayer Molybdenum Disulfide

Descriptive Note : Technical Report

Corporate Author : US Army Research Laboratory Adelphi United States

Personal Author(s) : Mazzoni, Alexander L ; Burke,Robert A ; Chin,Matthew L ; Hwee,Matthew J

Full Text :

Report Date : 01 Feb 2017

Pagination or Media Count : 50

Abstract : Molybdenum disulfide (MoS2) is a 2-D material that shows promise for flexible electronics, low-power applications, and optoelectronics due to its atomic thickness, high strain limit, large Ion/Ioff, and direct bandgap. We report on the electrical characterization of MoS2 transistors fabricated from US Army Research Laboratory-grown MoS2 and focus on how the MoS2 growth conditions affect the electrical performance. Metrics such as electron mobility, threshold voltage, hysteresis, and contact resistance are calculated for multiple devices on each growth condition. Measured devices had an electron mobility in the range of 115 cm2/Vs. MoS2 grown with lower sulfur precursor purity had the lowest mobility and a negatively shifted threshold voltage. A longer MoS2 growth time led to devices with the highest measured mobility. Transferring the MoS2 to a new substrate and modifying the growth setup to a 2-boat process show potential for improving device performance and prompt further investigation.

Descriptors :   field effect transistors , electron mobility , two dimensional , low power , optoelectronics , electrical properties , power electronics , carrier mobility , materials processing , material degradation processes , dielectric gases , electron beam lithography , chemical vapor deposition

Distribution Statement : APPROVED FOR PUBLIC RELEASE