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DS: Fachverband Dünne Schichten

DS 8: Charge Transfer Effects in Molecular Materials II (jointly with BP, CPP, HL)

DS 8.1: Hauptvortrag

Montag, 11. März 2013, 15:00–15:30, H40

a molecular picture of charge-transfer processes at donor-acceptor interfaces in organic solar cells — •Jean-Luc Bredas — School of Chemistry and Biochemistry/Center for Organic Photonics and Electronics, Georgia Institute of Technology, Atlanta, Georgia 30332-0400

Our objective in this presentation is two-fold. First, after a general introduction to organic solar cells, we use a molecular mechanics / molecular dynamics simulations approach to try and provide a molecular picture of the packing configurations (local morphology) at the interface between the donor and acceptor components in organic solar cells [1-3]. Then, we discuss in detail the impact that these local packing configurations at the interfaces have on the exciton-dissociation and charge-separation processes [4]. Systems under consideration include fullerene derivatives or n-type oligoacene derivatives as acceptors and low optical-gap polymers or small molecules (pentacene or squaraine derivatives) as donors.

References (1) N. Cates Miller, E. Cho, et al., Advanced Materials, in press (DOI: 10.1002/adma.201202293). (2) N. Cates Miller, E. Cho, et al., Advanced Energy Materials, in press (DOI: 10.1002/aenm.201200392). (3) Y.T. Fu, C. Risko, and J.L. Bredas, Advanced Materials, in press (DOI: 10.1002/adma.201203412). (4) J.L. Bredas, J. Norton, J. Cornil, and V. Coropceanu, Accounts of Chemical Research 42, 1691 (2009).