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Lecture Norbert Koch


12 January 2005 FWN-Building 5114.0004, Nijenborgh 4, 9747 AG, Groningen
Speaker: Dr. Norbert Koch
Affiliation: Institut für Physik, Humboldt-Universität zu Berlin, Germany
Title: Energy level alignment at interfaces between conjugated organic molecules and electrode materials
Date: Wed Jan 12, 2005
Start: 11.00
Location: FWN-Building 5114.0004
Host: P. Rudolf
Telephone: +31 50 363 4736 / 4974


Whenever charges are to be injected across interfaces in novel organic-based electronic and opto-electronic devices, knowledge of the electronic structure and the energy level alignment is essential for understanding and improving device performance. Numerous studies - frequently employing photoemission spectroscopy - have led to a thorough understanding of mechanisms governing the alignment of organic molecular energy levels in contact with electrode materials (metals and conducting polymers). Several of the important mechanisms (substrate work function phi, polarization, chemical reactions, and diffusion) will be discussed.

Studies on interfaces between conjugated molecules and high phi electrodes (Au, polyethylenedioxythiophene/polystyrenesulfonate) and low phi electrodes (Sm, alkali metals) reveal that several of the aforementioned mechanisms can be operational simultaneously.

Last modified:22 October 2012 2.30 p.m.