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SYOO: Organic Optoelectronics and Photonics

SYOO 2: Optoelectronic Properties

SYOO 2.1: Talk

Monday, March 7, 2005, 11:30–11:45, TU C130

Electronic Spectroscopy of Organic Semiconducters in Helium Nanodroplets — •O. Bünermann, M. Wewer, and F Stienkemeier — Fakultät für Physik, Universität Bielefeld, Universitätsstr. 25, D-33615 Bielefeld

Helium nanodroplet isolation spectroscopy (HENDI) is applied to study organic molecules and nanostructures of molecules. E.g., PTCDA and MePTCDI have been investigated. The suprafluid and cold helium environment allows to characterize geometric as well as electronic structures of these molecules [1]. In particular, charge transfer processes in complexes of molecules can be addressed [2]. By using a new pulsed laser system we were able to extend the measurements to a much wider range of excitation energies. Furthermore the opportunity arises to investigate other interesting molecules. Recent results in this line of work will be presented.

[1] M. Wewer and F. Stienkemeier, J. Chem. Phys. 120(3), 1239 (2004).

[2] M. Wewer and F. Stienkemeier, Phys. Rev. B 67, 125201 (2003).