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DS: Fachverband Dünne Schichten

DS 14: Poster

DS 14.55: Poster

Dienstag, 2. April 2019, 17:00–20:00, Poster E

Bisquinolylamide Metal Complexes for OFET — •Pascal Schweitzer¹, Georg Albrecht¹, Clemens Geis¹, Harald Locke², Peter R. Schreiner², and Derck Schlettwein¹ — ¹Justus-Liebig-Universität Gießen, Institut für Angewandte Physik — ²Justus-Liebig-Universität Gießen, Institut für Organische Chemie

Metal-organic complexes with two pincer-type bisquinolylamide ligands give the possibility to introduce a doubly charged metal ion M(II) center in an octahedral coordination sphere. Such coordination geometry is not commonly found in organic semiconducting complexes. Metals like Zn, Cr, Mn, Fe, Co were used in this present approach. The resulting cross-shaped complexes lead to stacking of the ligands’ electronic systems in two directions of the solid, indicated by XRD measurements on single crystals. Organic field-effect transistors (OFET) prepared on microstructured interdigitated gold electrode arrays on SiO₂ were used to investigate the charge-carrier mobility and electrical conductivity of these new molecular complexes. Potentiometry by atomic force microscopy in high vacuum was used to yield contact resistances between gold and the semiconductor materials in steady-state. In-situ measurements during film growth gave insight into layer and contact formation. Injection barriers between gold and the semiconductors were calculated from Kelvin probe force microscopy and data from cyclic voltammetry.