Regensburg 2007 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe

DS: Fachverband Dünne Schichten

DS 15: Poster Session

DS 15.1: Poster

Dienstag, 27. März 2007, 15:00–17:00, Poster B

The dielectric function of coronene studied by spectroscopic ellipsometry — •Daniel Lehmann and Dietrich R.T. Zahn — Chemnitz University of Technology, Semiconductor Physics, D-09107 Chemnitz, Germany

Coronene is a planar molecule and a promising candidate to be used as organic semiconductor due to its similarity to anthracene and pentacene. Especially for a possible use in organic light emitting diodes and organic solar cells the knowledge of the dielectric properties is crucial. We present the dielectric function of coronene thin films in the energy range from 0.73 eV to 5.00 eV. Several films with different thicknesses were grown in high vacuum on oxidized silicon substrates using organic molecular beam deposition and characterized ex situ by spectroscopic ellipsometry. The measured data of all samples were coupled to simulate the dielectric function using a mathematical model of summed Gauss functions to describe the optical response of the organic material.