Year: 2008
Type: article
Abstract: We investigate poly(ethylene imine) and diazonium salts as stable, complementary dopants on graphene. Transport in graphene devices doped with these molecules exhibits asymmetry in electron and hole conductance. The conductance of one carrier is preserved, while the conductance of the other carrier decreases. Simulations based on nonequilibrium Green's function formalism suggest that the origin of this asymmetry is imbalanced carrier injection from the graphene electrodes caused by misalignment of the electrode and channel neutrality points.
Source: Nano Letters
DOI: 10.1021/nl803214a
Authors: Damon B. Farmer, Roksana Golizadeh-Mojarad, Vasili Perebeinos, Yu-Ming Lin, George S. Tulevski, James C. Tsang, Phaedon Avouris
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W1977447550