Berlin 2018 – scientific programme

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O: Fachverband Oberflächenphysik

O 26: Organic-inorganic hybrid systems and organic films III

O 26.9: Talk

Tuesday, March 13, 2018, 12:30–12:45, MA 042

Optoelectronic Properties of Hybrid Systems of Inorganic Semiconductors and the Organic Semiconductor α-Hexathiophene — •Hannah Schamoni, Oliver Bienek, Felix Eckmann, and Martin Stutzmann — Walter Schottky Institut und Physik-Department, Technische Universität München, Am Coulombwall 4, 85748 Garching, Deutschland

The combination of organic and inorganic semiconductors is one promising approach towards new materials for applications like solar cells and light emitting devices, as they open up the possibility to benefit from the advantages of both material types. In order to identify the most promising hybrid systems, a detailed knowledge of the properties of the organic/inorganic interface is essential. In this work, thin films of the organic semiconductor α-hexathiophene are deposited on Si and SiC in an organic molecular beam deposition (OMBD) setup. The resulting hybrid systems are characterized amongst others by current-voltage and Kelvin Probe Force Microscopy measurements. On that basis, we discuss the influence of the choice of inorganic material on the optoelectronic properties of the hybrid systems. For example, the current-voltage output characteristics of the heterojunctions are found to depend on the doping type and strength of the inorganic substrate.