Electronic Properties of Organic Semiconductors


July 7 – 11, 2003



The workshop on the “Electronic Properties of Organic Semiconductors” has taken place from July 7 to July 11. The total number of participants was 46, coming from all over the world (particularly noticeable the large Japanese participation), has been substantially larger than anticipated. Both senior and junior participants took active part in the workshop and contributed to the lively atmosphere and discussions that have been taking place during the entire week. These were stimulated by the particular format of the workshop. The number of talks scheduled per day was typically three or four. These were all extended talks during which the initial part of the discussion took place, contributing to an easy interaction between the participants even after the talks. One poster session was scheduled. In our opinion this format is particularly suitable for workshops involving a large number of experimentalists, such as the present one (approximately two thirds of the audience).


The purpose of this workshop was to bring together researchers in the field of high purity molecular electronics and to assess the present state of the art in this field, both experimentally and theoretically. This assessment was expected to be crucial for the future developments of research in this area, in view of the case of scientific fraud which recently occurred at the Bell Laboratories. In these respects the workshop fully reached its goals, even beyond expectations.


In particular, all key players in the field were present and openly discussed their results, in many cases prior to their publication. This has allowed the direct comparison of the experimental results presently achieved in different laboratories. It was stimulating to see that experiments are reproduced with comparable outcome, indicating clear progress. More specifically, the values of electronic mobilities in the studied materials are rapidly increasing and their low-temperature characteristics are improving. For theorists, the common trends observed in the experimental data were of particular interest in that they allow to these results in an appropriate theoretical context. Specifically the role of electron-phonon and electron-electron interactions in organic materials was discussed, for different carrier density regimes.


The workshop also attracted the interest of the press, as the press release of the Lorentz Center attracted the interest of the Leidsch Dagblad, that published two articles on the happening.


The participants clearly expressed their enthusiasm for the workshop, they appreciated the its scientific contents as well as the logistic organization. Particularly efficient was the role of the Lorentz Center management.


A. Morpurgo (Delft, The Netherlands)

T.T.M. Palstra (University Groningen, The Netherlands)

J. van den Brink (Leiden University, The Netherlands)