Berlin 2005 – scientific programme
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DS: Dünne Schichten
DS 24: Postersitzung II
DS 24.9: Poster
Tuesday, March 8, 2005, 17:00–19:00, Poster TU B
The dielectric properties of organic heterostructures compared to mixed layers — •Daniel Lehmann, M. Friedrich, A. Fechner, and D.R.T. Zahn — Institut für Physik, Technische Universität Chemnitz, Reichenhainer Straße 70, D-09107 Chemnitz, Germany
Zinc phthalocyanine (ZnPc) and fullerene C60 are used in organic solar cells as p- respectively n-conducting materials. They can be deposited as individual layers in a heterostructur or as mixed (homogeneous or gradient) structures. The purpose of this work is to determine the differences in the optical properties of the various structures. ZnPc and C60 were evaporated respectively coevaporated on silicon substrates using Organic Molecular Beam Deposition (OMBD) in ultra high vacuum. The layers were studied ex situ with Variable Angle Spectroscopic Ellipsometry (VASE). The dielectric properties were obtained by fitting the ellipsometric data. The differences in the optical properties of the distinct structures are discussed with regard to the application in solar cells.