Bandgap engineering of bilayer graphene for field-effect transistor channels

Eiichi Sano, Taiichi Otsuji

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)


A potential difference between the two layers of bilayer graphene caused by charge doping and/or an applied gate field can open a bandgap. In this paper, bandgap and charge controllability in graphene field-effect transistors (GFETs) with doped bilayer graphene channels is clarified by solving a one-dimensional Poisson's equation, including electron and hole concentrations derived from a tightbinding Hamiltonian. The calculations show that a high doping concentration of 1013 cm-2 is required to produce a bandgap of 0.3 eV and that this degrades the charge controllability in GFETs.

Original languageEnglish
Pages (from-to)916051-916053
Number of pages3
JournalJapanese Journal of Applied Physics
Issue number9 Part 1
Publication statusPublished - 2009


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