| 초록 |
One of the most feasible approaches to control the electronic properties of graphene is chemical doping by incorporation of heteroatoms into graphitic framework. Particularly, nitrogen has been known as an effective atom for producing n-type semiconducting graphene channels by donating its lone pair of electrons to the graphene network. In this report, we synthesized nitrogen-doped graphene nanoribbon (GNR-Ns) with different amounts of doping by bottom-up method. The degree of nitrogen doping was controlled by changing the monomer feed ratio of pyrazine to benzene for polymerization. The μe of GNR-N increases with increasing the amount of nitrogen doping in GNR-Ns and the Vth of GNR-Ns is shifted from +20 V to ‒6 V, indicating that the charge transport behavior of GNR-Ns is changed from ambipolar to n-type as the amount of nitrogen doping increases in GNR-Ns. Particularly, the μe of GNR-N100 (0.102 cm2/V∙s) is two orders of magnitude higher that of GNR-N0. |
