Regensburg 2019 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 65: Poster Wednesday: Surface Structure, Epitaxy and Growth
O 65.13: Poster
Mittwoch, 3. April 2019, 17:45–20:00, Poster B1
2D Supramolecular Self-assembly of C8-BTBT on Cu(111) — •Sebastian Becker1,3, Lu Lyu1, Benjamin Stadtmüller1,2, Sina Mousavion1, Maniraj Mahalinam1 und Martin Aeschliemann1 — 1Department of Physics and Research Center OPTIMAS, University of Kaiserslautern, Erwin-Schrödinger-Straße 46, 67663 Kaiserslautern, Germany — 2Graduate School Materials Science in Mainz, Erwin-Schrödinger-Straße 46, 67663 Kaiserslautern, Germany — 3Department of Chemistry, University of Kaiserslautern, Erwin-Schrödinger-Straße 52, 67663 Kaiserslautern, Germany
Benzothieno[3,2-b]-benzothiophene (BTBT) is one of the most attractive core structures because of its chemical stability as well as its electronic properties and its derivatives with different end groups have been synthesized which demonstrate a very promising mobility up to 100 cm2V-1s-1. Here we use the VT-STM and LEED to systematically investigate the self-assemble behavior of monolayer 2,7 Dioctyl[1]-BTBT (C8-BTBT) on Cu(111). STM shows three different phases of C8-BTBT at 106 K. When increasing the sample temperature, phase transitions exist in different phases, which coincides with a temperature-dependent LEED measuring. Our findings will open insight into understanding of the mechanism of single-crystal organic semiconductor to further improve the performance.