Berlin 2012 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 24: Poster: Organic Semiconductors

CPP 24.2: Poster

Wednesday, March 28, 2012, 11:00–13:00, Poster A

Ortho- and Terminal-substituted Perylene Diimides as Acceptor Materials for Organic Solar Cells — •Valentin Kamm, Glauco Battagliarin, Ian A. Howard, Michael Hansen, Hans W. Spiess, Chen Li, Klaus Müllen, and Frédéric Laquai — Max-Planck-Institute for Polymer Research, Mainz, Germany

Perylene diimide (PDI) is a promising electron acceptor material for high open circuit voltage bulk heterojunction organic solar cells. However, many PDI molecules have the tendency to strongly aggregate leading to intermolecular excited state formation that can result in exciton trapping.[1] Recently, a method for substitution at the ortho-position of the PDI core was introduced giving access to novel acceptor molecules.[2] The substitution affects the stacking and therefore the charge carrier mobility and excited state energies and dynamics. In this contribution we present the excited state and intermolecular packing of a series of PDI molecules with different substitution patterns at the terminal- and ortho-position investigated by time-resolved photoluminescence and solid-state NMR techniques.

[1] I. A. Howard, F. Laquai, P. E. Keivanidis, R. H. Friend, N. C. Greenham, J. Phys. Chem. C, 2009,113, 21225-21232. [2] Glauco Battagliarin, Chen Li, Volker Enkelmann, and Klaus Müllen, Organic Letters, 2011,13,3012-3015.