Regensburg 2016 – scientific programme

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O: Fachverband Oberflächenphysik

O 22: Organic-Inorganic Hybrid Systems and Organic Films

O 22.10: Poster

Monday, March 7, 2016, 18:15–20:30, Poster E

Energy-Level-Engineering of Indium-Tin-Oxide (ITO) - Linking Simulation and Experiment for Small Molecule Self-Assembled-Monolayers (SAMs) — •Johannes Breuer, Julia Rittich, Sebastian Mäder, Carolin C. Jacobi, and Matthias Wuttig — I. Institute of Physics (IA), RWTH Aachen University

Organic electronics promise cost-effective and easy fabrication of highly energy-efficient and versatile devices. Over the last decade these prospects have motivated a vast variety of research activities. One of the major issues that still has to be addressed is the energy-level-mismatch at the critical electrode-organic interface.

Indium tin oxide (ITO) is a transparent conductive electrode-material that is crucial for the development of organic electronic applications like organic thin-film transistors (OTFTs) or organic light emitting diodes (OLEDs). Understanding and controlling the surface properties of ITO allows molecular engineering of the ITO organic interface which enables precise control of the interfacial chemistry and electronics. One way to optimize the energy-level alignment at the ITO interface is the use of monolayers based on organic molecules with tailored functional groups.

In this work the modified surfaces of ITO coated with self-assembled-monolayers (SAMs) are characterized by means of photoelectron spectroscopy, contact angle and kelvin probe measurements. Via gas-phase simulations of these organic molecules it is possible to link calculated properties and experimental results.