Regensburg 2016 – wissenschaftliches Programm
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DS: Fachverband Dünne Schichten
DS 4: Organic Thin Films I
DS 4.10: Vortrag
Montag, 7. März 2016, 12:15–12:30, H11
A novel strategy for enhancing layer-by-layer growth of organic thin films: Temperature variation during individual monolayer growth — •Laura Bogula, Linus Pithan, Anton Zykov, and Stefan Kowarik — Inst. für Physik, Humboldt-Universität zu Berlin, Germany
We investigate the influence of a time dependent substrate temperature on the thin film growth of the organic semiconductor PTCDI-C8. We show that varying the substrate temperature during the growth of each monolayer allows one to control the nucleation and coalescence regimes and to enhance layer-by-layer growth. We analysed the PTCDI-C8 films with in situ X-ray reflectivity at the Anti-Bragg point and post-growth atomic force microscopy and consistently found smoother films when the dynamic heating method was applied as compared with static substrate temperatures. We thus demonstrate a novel method to induce enhanced layer-by-layer growth of organic molecules, which is highly relevant for applications in organic electronics.