An extended phenacene-type molecule, [8]Phenacene: Synthesis and transistor application

Hideki Okamoto, Ritsuko Eguchi, Shino Hamao, Hidenori Goto, Kazuma Gotoh, Yusuke Sakai, Masanari Izumi, Yutaka Takaguchi, Shin Gohda, Yoshihiro Kubozono

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

AAnew 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 cm2 V-1 s -1, demonstrating excellent FET characteristics; the average μ was evaluated as 1.2(3) cm2 V-1 s-1. The m value in the [8]phenacene electric-double-layer FET reached 16.4 cm2 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) cm2 V-1 s-1. The μ values recorded in this study show that [8]phenacene is a promising molecule for transistor applications.

Original languageEnglish
Article number5330
JournalScientific reports
Volume4
DOIs
Publication statusPublished - Jun 17 2014

ASJC Scopus subject areas

  • General

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