Toward controlling contact polarity and contact resistance in 2D-material devices

https://phys.org/news/2023-04-contact-polarity-resistance-2d-material-devices.html

"molybdenum disulfide and tungsten diselenide on gold contacts p-type when no defects... chalcogen vacancy defects in WSe2 in ambient conditions react with oxygen and remove states in band gap behaves like pristine material with no defects, which is p-type contact polarity... chalcogen vacancy defects in MoS2 are less reactive, it is conceivable that experimental conditions can be arranged to allow the defects to be similarly 'passivated' by oxygen... more tunable control of energy offset at MoS2 contacts"

Related: Physicists' 2D crystals show promise for advanced electronics

https://phys.org/news/2023-04-physicists-2d-crystals-advanced-electronics.html