title: Synthesis and transistor application of the extremely extended phenacene molecule, [9]phenacene.
abstract: Many chemists have attempted syntheses of extended π-electron network molecules because of the widespread interest in the chemistry, physics and materials science of such molecules and their potential applications. In particular, extended phenacene molecules, consisting of coplanar fused benzene rings in a repeating W-shaped pattern have attracted much attention because field-effect transistors (FETs) using phenacene molecules show promisingly high performance. Until now, the most extended phenacene molecule available for transistors was [8]phenacene, with eight benzene rings, which showed very high FET performance. Here, we report the synthesis of a more extended phenacene molecule, [9]phenacene, with nine benzene rings. Our synthesis produced enough [9]phenacene to allow the characterization of its crystal and electronic structures, as well as the fabrication of FETs using thin-film and single-crystal [9]phenacene. The latter showed a field-effect mobility as high as 18 cm(2) V(-1) s(-1), which is the highest mobility realized so far in organic single-crystal FETs.
authors.affiliation: Department of Electric and Electronic Engineering, Okayama University, Okayama 700-8530, Japan.
authors.forename: Yuma
authors.initials: Y
authors.lastname: Shimo
authors.affiliation: Department of Electric and Electronic Engineering, Okayama University, Okayama 700-8530, Japan.
authors.forename: Takahiro
authors.initials: T
authors.lastname: Mikami
authors.affiliation: Research Laboratory for Surface Science, Okayama University, Okayama 700-8530, Japan.
authors.forename: Shino
authors.initials: S
authors.lastname: Hamao
authors.affiliation: Research Laboratory for Surface Science, Okayama University, Okayama 700-8530, Japan.
authors.forename: Hidenori
authors.initials: H
authors.lastname: Goto
authors.affiliation: Department of Chemistry, Okayama University, Okayama 700-8530, Japan.
authors.forename: Hideki
authors.initials: H
authors.lastname: Okamoto
authors.affiliation: Research Laboratory for Surface Science, Okayama University, Okayama 700-8530, Japan.
authors.forename: Ritsuko
authors.initials: R
authors.lastname: Eguchi
authors.affiliation: NARD Co. Ltd. Amagasaki 660-0805, Japan.
authors.forename: Shin
authors.initials: S
authors.lastname: Gohda
authors.affiliation: Department of Electric and Electronic Engineering, Okayama University, Okayama 700-8530, Japan.
authors.forename: Yasuhiko
authors.initials: Y
authors.lastname: Hayashi
authors.affiliation: Research Laboratory for Surface Science, Okayama University, Okayama 700-8530, Japan.|Research Centre of New Functional Materials for Energy Production, Storage and Transport, Okayama University, Okayama 700-8530, Japan.
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Kubozono