title: Transistor Properties of 2,7-Dialkyl-Substituted Phenanthro[2,1-b:7,8-b']dithiophene.
abstract: A new phenacene-type molecule with five fused aromatic rings was synthesized: 2,7-didodecylphenanthro[2,1-b:7,8-b']dithiophene ((C12H25)2-i-PDT), with two terminal thiophene rings. Field-effect transistors (FETs) using thin films of this molecule were fabricated using various gate dielectrics, showing p-channel normally-off FET properties with field-effect mobilities (μ) greater than 1 cm2V-1s-1. The highest μ value in the thin-film FETs fabricated in this study was 5.4 cm2V-1s-1, when a 150 nm-thick ZrO2gate dielectric was used. This implies that (C12H25)2-i-PDT is very suitable for use in a transistor. Its good FET performance is fully discussed, based on electronic/topological properties and theoretical calculations.
authors.affiliation: Research Laboratory for Surface Science, Okayama University, Okayama 700-8530, Japan.|Research Institute for Interdisciplinary Science, Okayama University, Okayama 700-8530, Japan.
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Kubozono
authors.affiliation: Division of Earth, Life, and Molecular Sciences, Graduate School of Natural Science and Technology, Okayama University, Okayama 700-8530, Japan.
authors.forename: Keita
authors.initials: K
authors.lastname: Hyodo
authors.affiliation: Research Laboratory for Surface Science, Okayama University, Okayama 700-8530, Japan.|Research Institute for Interdisciplinary 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: Yuma
authors.initials: Y
authors.lastname: Shimo
authors.affiliation: Research Institute for Interdisciplinary Science, Okayama University, Okayama 700-8530, Japan.
authors.forename: Hiroki
authors.initials: H
authors.lastname: Mori
authors.affiliation: Research Institute for Interdisciplinary Science, Okayama University, Okayama 700-8530, Japan.
authors.forename: Yasushi
authors.initials: Y
authors.lastname: Nishihara