title: An extended phenacene-type molecule, [8]phenacene: synthesis and transistor application.
abstract: A new phenacene-type molecule, [8]phenacene, which is an extended zigzag chain of coplanar fused benzene rings, has been synthesised for use in an organic field-effect transistor (FET). The molecule consists of a phenacene core of eight benzene rings, which has a lengthy π-conjugated system. The structure was verified by elemental analysis, solid-state NMR, X-ray diffraction (XRD) pattern, absorption spectrum and photoelectron yield spectroscopy (PYS). This type of molecule is quite interesting, not only as pure chemistry but also for its potential electronics applications. Here we report the physical properties of [8]phenacene and its FET application. An [8]phenacene thin-film FET fabricated with an SiO2 gate dielectric showed clear p-channel characteristics. The highest μ achieved in an [8]phenacene thin-film FET with an SiO2 gate dielectric is 1.74 cm(2) V(-1) s(-1), demonstrating excellent FET characteristics; the average μ was evaluated as 1.2(3) cm(2) V(-1) s(-1). The μ value in the [8]phenacene electric-double-layer FET reached 16.4 cm(2) V(-1) s(-1), which is the highest reported in EDL FETs based on phenacene-type molecules; the average μ was evaluated as 8(5) cm(2) V(-1) s(-1). The μ values recorded in this study show that [8]phenacene is a promising molecule for transistor applications.
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: 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: Kazuma
authors.initials: K
authors.lastname: Gotoh
authors.affiliation: Research Laboratory for Surface Science, Okayama University, Okayama 700-8530, Japan.
authors.forename: Yusuke
authors.initials: Y
authors.lastname: Sakai
authors.affiliation: Research Laboratory for Surface Science, Okayama University, Okayama 700-8530, Japan.
authors.forename: Masanari
authors.initials: M
authors.lastname: Izumi
authors.affiliation: Graduate School of Environmental and Life Science, Okayama University, Okayama 700-8530, Japan.
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Takaguchi
authors.affiliation: NARD Co. Ltd., Amagasaki 660-0805, Japan.
authors.forename: Shin
authors.initials: S
authors.lastname: Gohda
authors.affiliation: 1] Research Laboratory for Surface Science, Okayama University, Okayama 700-8530, Japan [2] Research Centre of New Functional Materials for Energy Production, Storage and Transport, Okayama University, Okayama 700-8530, Japan [3] Japan Science and Tecnology Agency, ACT-C Kawaguchi 322-0012, Japan.
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Kubozono