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The optical spectra of thin films give therefore insight into the intermolecular coupling, which is relevant for transport properties and thus important for device applications. A further aspect is to monitor and control the film growth in order to obtain desired film properties. Optical methods are very well suited to study these properties in situ and in real-time to observe possible changes, such as:
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For the optical characterization we employ different experimental setups:
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[1] Birks Photophysics of aromatic molecules, Wiley (1970)
[2] R. Scholz, Organic Semiconductors, Encyclopedia of
Condensed Matter Physics (2005)
[3] A. S. Davydov, The theory of molecular excitons, Soviet
Physics (1964)
[4] U. Heinemeyer, R. Scholz, L. Gisslen, M. I. Alonso,
J. O. Osso, M. Garriga, A. Hinderhofer, M. Kytka, S. Kowarik,
A. Gerlach, and F. Schreiber. Exciton-phonon coupling in
diindenoperylene thin films Phys. Rev. B 78 (2008) 085210
For our recent work on the optical properties of organic thin films, see list of publications.