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Type: 
Journal
Description: 
We report the fabrication and optoelectronic characterization of field-effect transistors (FETs) based on few-layer ReSe2. The devices show n-type conduction due to the Cr contacts that form low Schottky barriers with the ReSe2 nanosheet. We show that the optoelectronic performance of these FETs is strongly affected by air pressure, and it undergoes a dramatic increase in conductivity when the pressure is lowered below the atmospheric one. Surface-adsorbed oxygen and water molecules are very effective in doping ReSe2; hence, FETs based on this two-dimensional (2D) semiconductor can be used as an effective air pressure gauge. Finally, we report negative photoconductivity in the ReSe2 channel that we attribute to a back-gate-dependent trapping of the photo-excited charges.
Publisher: 
MDPI
Publication date: 
31 May 2022
Authors: 

Faella Enver, Kimberly Intonti, Loredana Viscardi, Filippo Giubileo, Arun Kumar, Hoi T. Lam, Konstantinos Anastasiou, Monica F. Craciun, Saverio Russo, Antonio Di Bartolomeo

Biblio References: 
Volume: 12 Issue: 11 Pages: 1886
Origin: 
Nanomaterials