期刊
ADVANCED ELECTRONIC MATERIALS
卷 7, 期 2, 页码 -出版社
WILEY
DOI: 10.1002/aelm.202000838
关键词
field-effect transistors; field emission; gate control; molybdenum disulfide; pressure effects
资金
- DFG -German Research Foundation [406129719]
- German Research Foundation (DFG) [RI_00313]
- MIUR -Italian Ministry of Education, University and Research (project Pico Pro) [ARS01_01061]
- MIUR -Italian Ministry of Education, University and Research (project RINASCIMENTO) [ARS01_01088]
Monolayer molybdenum disulfide nanosheets obtained via chemical vapor deposition were used to fabricate field-effect transistors with n-type conduction, high on/off ratio, and good mobility. The study demonstrated that the voltage applied to the Si substrate back-gate can modulate the field emission current.
Monolayer molybdenum disulfide (MoS2) nanosheets, obtained via chemical vapor deposition onto SiO2/Si substrates, are exploited to fabricate field-effect transistors with n-type conduction, high on/off ratio, steep subthreshold slope, and good mobility. The transistor channel conductance increases with the reducing air pressure due to oxygen and water desorption. Local field emission measurements from the edges of the MoS2 nanosheets are performed in high vacuum using a tip-shaped anode. It is demonstrated that the voltage applied to the Si substrate back-gate modulates the field emission current. Such a finding, that it is attributed to gate-bias lowering of the MoS2 electron affinity, enables a new field-effect transistor based on field emission.
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