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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 50: Poster: Organic Electronics and Photovoltaics, Molecular Excitations

CPP 50.23: Poster

Mittwoch, 22. März 2017, 18:30–21:00, P3

Structuring of insoluble polythiophene for organic solar cells — •Eva Maria Kratzer, Jenny Lebert, and Eva Maria Herzig — TU München, Munich School of Engineering, Herzig Group, 85748 Garching

Polythiophene, an insoluble semiconducting material, can be used as donor material in organic polymer solar cells. However, to cheaply process this material from solution the insolubility needs to be taken into account. Therefore, it is synthesized in situ from the soluble monomer to make it processable in solution. Advantages of the polythiophene are the low costs and the high availability of the used material for the synthesis. An important property for organic solar cells fabrication is a high degree of interfacial control between the donor and acceptor material for efficient charge separation.

In this work, we exploit the insolubility of the polythiophene thin films for processing of structured multilayers. Different approaches are shown to achieve well-defined, structured donor-acceptor interfaces. The structured multilayers are investigated regarding their geometric from on various length scales and the resulting influence on the electronic properties is systematically analyzed with microscopy, spectroscopy and scattering.