Regensburg 2013 – scientific programme

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DS: Fachverband Dünne Schichten

DS 32: Poster Session IV: Atomic layer deposition; Organic thin films; Organic Electronics and Phototovoltaics; Organic Materials for Spintronics - from spinterface to devices; Thin film photovoltaic materials and solar cells

DS 32.34: Poster

Thursday, March 14, 2013, 17:00–20:00, Poster B2

Interface Analysis of Thermally Evaporated Thin Noble Metal Films on PTCDI-C13 — •Carolin C. Jacobi, Daniel Gebauer, Rüdiger M. Schmidt, Christina M. M. Guntermann, Cathy Jodocy, Christian Effertz, and Matthias Wuttig — I. Physikalisches Institut (IA), RWTH Aachen University, D-52056 Aachen, Germany

In recent years optoelectronic devices based on organic thin-films have gained considerable interest. They offer a wide range of possible applications and have advantageous properties such as flexibility, applicability to large areas and low production costs. The performance of devices such as organic light emitting diodes (OLED), organic field effect transistors (OFET) or organic solar cells (OSC) depends critically on the interfaces between the different layers, e.g. the organic layer and the metal electrodes. In this study, thin noble metal top contacts (Gold and Silver) have been thermally evaporated with varying film thickness and different deposition rates on N,N*-ditridecyl-3,4,9,10-perylenetetracarboxylic diimide (PTCDI-C13), which is a promising n-type material for OFETs, because it exhibits a high electron mobility. A detailed investigation of the interface between the noble metal contact and the underlying PTCDI-C13 layer is presented. We have characterized the influence of metal evaporation on the organic layer with photoelectron spectroscopy (PS) and Rutherford backscattering spectroscopy (RBS). The morphology of the metal top layer has been investigated by scanning electron microscopy (SEM).