Field of Expertise: Advanced Material Science

Attachment-limited nucleation and growth of organic films: Pentacene on sputter modified mica (001)
Levent Tumbek
Institut für Festkörperphysik
15:20 - 17:30 Thursday 24 October 2013 Foyer Alte Technik

The morphology of organic thin films is crucial for the functionality of organic electronic devices. Understanding the initial growth and formation of organic thin films requires a detailed description of island nucleation. The island density as a function of the deposition rate and the distribution of the areas of the capture zones of islands measurements are used for determination of critical island size. Here we consider the aggregation of pentacene islands on sputter amorphized mica as a model system for weakly interacting substrates. We show that nucleation and growth is diffusion limited at low deposition rates, and becomes limited by hindered-attachment at high deposition rates.