Regensburg 2019 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 19: Poster Monday: Organic Molecules on Inorganic Surfaces
O 19.6: Poster
Montag, 1. April 2019, 17:45–20:00, Poster F
Diels-Alder adduct formation of pentacene and C60 on graphene/Ru(0001) and Cu/Ru(0001) — •Sebastian Flade and Peter Jakob — Fachbereich Physik, Philipps-Universität Marburg, 35032 Marburg, Germany
The combination of pentacene and C60 represents a prototypical donor-acceptor system that is ideal to study fundamental processes in organic photovoltaics. Very recently, an efficient Diels-Alder adduct formation at the heterolayer interface has been reported.1 Using infrared-absorption spectroscopy we have unambiguously identified the reaction product and investigated the kinetics of this reaction. Specifically, the thermal evolution of the formation and decomposition of the C60-PEN adduct has been examined. Another aspect concerned the dependence on layer thickness and stacking sequence which seem to play an only minor role for the described (reversible) interface reaction. We demonstrate that the reaction likewise proceeds when one of the reaction partners is in direct contact with the substrate. This has been verified for inert substrates like graphene/Ru(0001), as well as the more reactive Cu/Ru(0001) template.
1T. Breuer et al., Adv. Mater. Interfaces 3 (2016) 1500452.