| Abstract
| - Low-energy electron photoemission spectroscopy (LEPS) allows thestudy of the electronic properties of organized organic thin films(OOTF) adsorbed on conducting surfaces by monitoring the energyand angular distribution of electrons emitted from the substrateand transmitted through the film. The transmission properties areexplained by electronic band structure in the organic film. Thisband is an example of an electron resonance that is delocalized inthe layer. It results from the two-dimensional nature of the layer.Other resonances in the transmission spectra are also discussed,as well as their experimental manifestation. The temperaturedependence of the electron transmission efficiency is explained interms of dependence of the transmission probability on the initialmomentum of the electron and on the relative orientation of theelectron velocity and the molecules in the film. Hence, despite thefact that the molecules in the OOTF are weakly interacting, whennot charged, the electron transmission through the film is governedby cooperative effects. These effects must be taken into accountwhen considering electronic properties of adsorbed layers.
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