Berlin 2015 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 30: P2: Organic Electronics and Photovoltaics

CPP 30.17: Poster

Dienstag, 17. März 2015, 14:00–16:00, Poster B

Morphology tuning and interface engineering of new donor model layers — •Saunak Das¹, Felix Herrmann¹, Rainer Beckert², Benjamin Dietzek^1,3, and Martin Presselt¹ — ¹Institute of Physical Chemistry, Friedrich Schiller University Jena, D-07743 Jena, Germany — ²Institute of Organic Chemistry and Macromolecular Chemistry, Friedrich Schiller University Jena, D-07743 Jena, Germany — ³Leibniz Institute of Photonic Technology (IPHT), Albert-Einstein-Str. 9, 07745 Jena, Germany

In the last years the efficiency of organic solar cells has been greatly enhanced towards actually 12%. These enhancements were mainly driven by using and synthesizing new active materials. The basic processes of exciton dissociation and recombination at the donor-acceptor interface are extensively debated because in bulk heterojunction devices capturing the nature of the interface and its morphology is challenging. Using the Langmuir-Blodgett technique allows for the production of donor- acceptor bilayer structures with defined interfaces and tunable ordering as model systems. We focus on tuning of the morphology of individual layers composed of merocyanines of varied chromophore size and their optical properties. Thus, one essential precondition for the investigation of defined donor-acceptor interfaces is accomplished.