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SUMMARY:Functional interfaces in organic electronic devices - Dr. Norbert 
 Koch\, Humboldt-Universität zu Berlin\, Institut für Physik\, Germany
DTSTART:20090113T143000Z
DTEND:20090113T153000Z
UID:TALK15788@talks.cam.ac.uk
CONTACT:Dr. Z Chen
DESCRIPTION:A most appealing feature of the development of (opto-) electro
 nic devices based on conjugated organic materials is the highly visible li
 nk between fundamental research and technological advances. Improved under
 standing of organic material properties can often instantly be implemented
  in novel device architectures\, which results in a rapid progress of perf
 ormance and functionality of devices. Interfaces between dissimilar materi
 als – organic/organic and organic/inorganic – are inherent in organic 
 electronic devices. It has been recognized that these interfaces are a key
  for device function and efficiency. Photoelectron spectroscopy is a key t
 ool for investigating the energy levels at such contacts. However\, comple
 mentary experimental methods (e.g.\, scanning tunneling microscopy\, x-ray
  absorption spectroscopy\, x-ray standing waves) have to be used in conjun
 ction with theoretical modeling in order to obtain a comprehensive underst
 anding of elementary physico-chemical interfacial phenomena. Prototypical 
 examples will be presented that show how the complex interplay of molecula
 r orientation\, molecule-substrate charge transfer\, and molecular conform
 ation dependent dipoles controls the energy level alignment at molecule/el
 ectrode contacts.
LOCATION:Kapitza Building Seminar Room\, Cavendish Laboratory\, Department
  of Physics
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