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O: Fachverband Oberflächenphysik

O 85: Organic-Inorganic Systems IV: Electronic Structure

O 85.6: Vortrag

Donnerstag, 10. März 2016, 16:30–16:45, S051

Characterizing Charge-Transfer Effects at Metal/Organic Interfaces by means of Two-Photon Photoemission — •David Gerbert and Petra Tegeder — Physikalisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Deutschland,

Further progress in the field of organic electronic devices requires a fundamental understanding of metal/molecule interactions at the interface between organic semiconducting materials and metal electrodes. These metal/molecule interactions lead to an energetic realignment, including the formation of new states and even bands, which may act as a basis for a improved device performance [1].Two-photon photoemission (2PPE) is a powerful tool which enables the observation of occupied and unoccupied electronic states directly at the interface. Additionally 2PPE experiments can be performed in a time-resolved or angle-resolved manner to gain insights into dynamics of optically excited electronic states and possible delocalized charge-carriers.

In this talk I will show recent results of different adsorbate/metal interfaces indicating adsorption-induced energetic realignment and band formation.

[1] M. Wießner et al., Nat- Commun. 2013, 4, 1514.