Dresden 2014 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 19: Poster Session 1 (joint session with BP)

CPP 19.59: Poster

Tuesday, April 1, 2014, 09:30–13:00, P1

Theoretical Investigations of Surface Relief Gratings Based on Azobenzene-Containing Polymers — •Marcus Böckmann and Nikos L. Doltsinis — Institut für Festkörpertheorie, Westfälische Wilhelms-Universität Münster, Münster, Germany

Polymers containing the azobenzene (AB) chromophore are known to exhibit photo-fluidity when exposed to inhomogeneous light fields [1]. This phenomenon results in effective mass transport and can be utilized to, e.g., create surface relief structures of distinguished shape. Recently, it has been demonstrated that specific surface relief gratings (SRGs) imprinted on the rear panel of organic photovoltaic solar cells contribute to enhanced efficiency due to trapping of incident light [2].

We investigate the photoinduced behaviour of such an active layer based on the PDO3M azo-polymer by means of multiscale molecular dynamics simulation techniques [3] making use of a molecular mechanics switch for AB photoisomerisation that we designed recently [4].

[1] P. Karageorgiev, D. Neher, B. Schulz, B. Stiller, U. Pietsch, M. Giersig, and L. Brehmer Nature Materials 4, 699 (2005). [2] S.-I. Na, S.-S. Kim, J. Jo, S.-H. Oh, J. Kim, and D-Y. Kim Adv. Funct. Mater. 18, 3956 (2008). [3] M. Böckmann, D. Marx, C. Peter, L. Delle Site, K. Kremer, and N. Doltsinis, Phys. Chem. Chem. Phys. 10, 1039 (2011). [4] M. Böckmann, S. Braun, N. L. Doltsinis, and D. Marx, J. Chem. Phys. 139, 084108 (2013).