title: Flexible gigahertz transistors derived from solution-based single-layer graphene.
abstract: Flexible electronics mostly relies on organic semiconductors but the limited carrier velocity in polymers and molecular films prevents their use at frequencies above a few megahertz. Conversely, the high potential of graphene for high-frequency electronics on rigid substrates was recently demonstrated. We conducted the first study of solution-based graphene transistors at gigahertz frequencies, and we show that solution-based single-layer graphene ideally combines the required properties to achieve high speed flexible electronics on plastic substrates. Our graphene flexible transistors have current gain cutoff frequencies of 2.2 GHz and power gain cutoff frequencies of 550 MHz. Radio frequency measurements directly performed on bent samples show remarkable mechanical stability of these devices and demonstrate the advantages of solution-based graphene field-effect transistors over other types of flexible transistors based on organic materials.
authors.affiliation: CEA Saclay, IRAMIS, Service de Physique de l'Etat Condensé (URA 2464), Laboratoire d'Electronique Moléculaire, F-91191 Gif sur Yvette, France.
authors.forename: Cédric
authors.initials: C
authors.lastname: Sire
authors.forename: Florence
authors.initials: F
authors.lastname: Ardiaca
authors.forename: Sylvie
authors.initials: S
authors.lastname: Lepilliet
authors.forename: Jung-Woo T
authors.initials: JW
authors.lastname: Seo
authors.forename: Mark C
authors.initials: MC
authors.lastname: Hersam
authors.forename: Gilles
authors.initials: G
authors.lastname: Dambrine
authors.forename: Henri
authors.initials: H
authors.lastname: Happy
authors.forename: Vincent
authors.initials: V
authors.lastname: Derycke
mesh_terms: D003460:Crystallization / Q000379:methods; D055119:Elastic Modulus; D004867:Equipment Design; D019544:Equipment Failure Analysis; D006108:Graphite / Q000737:chemistry*; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size; D012996:Solutions; D014173:Transistors, Electronic
chemical_list: D012996:Solutions; D006108:Graphite