title: Structural Polymorphism and Thin Film Transistor Behavior in the Fullerene Framework Molecule 5,6;11,12-di-o-Phenylenetetracene.
abstract: The molecular structure of the hydrocarbon 5,6;11,12-di-o-phenylenetetracene (DOPT), its material characterization and evaluation of electronic properties is reported for the first time. A single-crystal X-ray study reveals two different motifs of intramolecular overlap with herringbone-type arrangement displaying either face-to-edge or co-facial face-to-face packing depicting intensive π-π interactions. Density functional theory (DFT) calculations underpin that a favorable electronic transport mechanism occurs by a charge hopping process due to a π-bond overlap in the DOPT polymorph with co-facial arene orientation. The performance of polycrystalline DOPT films as active organic semiconducting layer in a state-of-the-art organic field effect transistor (OFET) device was evaluated and proves to be film thickness dependent. For 40 nm layer thickness it displays a saturation hole mobility (μhole ) of up to 0.01 cm(2)  V(-1)  s(-1) and an on/off-ratio (Ion /Ioff ) of 1.5×10(3) .
authors.affiliation: Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt, Alarich-Weiss-Strasse 12, 64287, Darmstadt, Germany.
authors.forename: Tobias
authors.initials: T
authors.lastname: Wombacher
authors.affiliation: Institut für Material- und Geowissenschaften, Technische Universität Darmstadt, Fachgebiet Elektronische Materialeigenschaften, Alarich-Weiss-Strasse 2, 64287, Darmstadt, Germany.
authors.forename: Andrea
authors.initials: A
authors.lastname: Gassmann
authors.affiliation: Institut für Material- und Geowissenschaften, Technische Universität Darmstadt, Fachgebiet Strukturforschung, Germany.
authors.forename: Sabine
authors.initials: S
authors.lastname: Foro
authors.affiliation: Institut für Material- und Geowissenschaften, Technische Universität Darmstadt, Fachgebiet Elektronische Materialeigenschaften, Alarich-Weiss-Strasse 2, 64287, Darmstadt, Germany.
authors.forename: Heinz
authors.initials: H
authors.lastname: von Seggern
authors.affiliation: Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt, Alarich-Weiss-Strasse 12, 64287, Darmstadt, Germany. joerg.schneider@ac.chemie.tu-darmstadt.de.
authors.forename: Jörg J
authors.identifier: 0000-0002-8153-9491
authors.initials: JJ
authors.lastname: Schneider
keywords: fullerene; fused-ring systems; hydrocarbons; organic field effect transistor; polycycles