Site-specific electronic structure of an oligo-ethylenedioxythiophene derivative probed by resonant photoemission
2005 (English)In: New Journal of Physics, ISSN 1367-2630, Vol. 7Article in journal (Refereed) Published
A combination of conventional and resonant photoemission spectroscopy, x-ray absorption spectroscopy and ground-state quantum-chemical calculations has been used to study the valence electronic structure of a phenyl-capped 3,4-ethylenedioxythiophene oligomer, in polycrystalline thin films. The photon energy-dependent intensities of specific resonant decay channels are interpreted in terms of the spatial overlap of the excitation site and the ground-state molecular orbital involved in the decay. By making use of chemical shifts, excitations on different atomic sites are distinguished. It is demonstrated that site-specific information on the electronic structure of relatively large and complex organic systems may be obtained experimentally from non-radiative resonant decay spectra. In addition, these spectra provide relevant insight into the interpretation of near-edge x-ray absorption fine structure spectra. © IOP Publishing Ltd and Deutsche Physikalische Gesellschaft.
Place, publisher, year, edition, pages
2005. Vol. 7
IdentifiersURN: urn:nbn:se:liu:diva-28798DOI: 10.1088/1367-2630/7/1/104Local ID: 13984OAI: oai:DiVA.org:liu-28798DiVA: diva2:249610