Dresden 2006 – scientific programme

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HL: Halbleiterphysik

HL 31: Organic semiconductors

HL 31.4: Talk

Wednesday, March 29, 2006, 15:15–15:30, POT 51

Two dimensional dispersion of electron-hole excitations in pentacene — •Roman Schuster and Martin Knupfer — Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden, D-01069 Dresden, Germany

We have investigated the dispersion of the lowest electron-hole excitation in pentacene within the a-b crystal plane using inelastic electron scattering. Surprisingly, the results indicate a significant dispersion anisotropy. The results will be discussed in consideration of different inter-molecular interactions that can cause the observed dispersions.