Journal
MACROMOLECULAR CHEMISTRY AND PHYSICS
Volume 214, Issue 23, Pages 2768-2773Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/macp.201300529
Keywords
graphene nanoribbons; nitrogen-doping; n-type semiconducting property; solution processability; thin-film transistors
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Funding
- Ministry of Education, Science and Technology, Korea through the Global Research Laboratory (GRL)
- National Research Foundation of Korea [2007-00015] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Novel nitrogen-doped graphene nanoribbons (GNR-Ns) are synthesized by the coupling reaction between a pyrazine (or benzene) derivative and naphthalene followed by cyclodehydrogenation. The amount of nitrogen doping in the GNR-Ns is controlled by changing the monomer feed ratio of pyrazine to benzene for polymerization. The electron mobility of the GNR-Ns increases while the hole mobility decreases, as the amount of nitrogen doping in the GNR increases, indicating that the charge-transport behavior of GNRs is changed from ambipolar to an n-type semiconductor. The threshold voltage of the GNR-Ns also shifts from 20 to -6 V as the amount of nitrogen doping increases.
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