Berlin 2012 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 6: Poster: Structural Ordering and Electronic Transport (joint focus with HL)

CPP 6.19: Poster

Montag, 26. März 2012, 17:30–19:30, Poster A

Structured Interfaces in Organic Photovoltaic Devices — •Claudia Maria Palumbiny¹, Robert Meier¹, Holger Christian Hesse², Ricky Dunbar², Lukas Schmidt-Mende², and Peter Müller-Buschbaum¹ — ¹TU München, Physik -Department, LS Funktionelle Materialien, James-Franck-Str. 1, 85748 Garching, Germany — ²LMU München, Center for NanoScience (CeNS), Hybrid Nanostructures, Amalienstr.45, 80799 München, Germany

Precise control of the heterojunction morphology in thin films is one of the key issues for the improvement of organic photovoltaic (OPV) devices. Interdigitated interfaces of the organic material on the nanoscale provide ideal charge extraction pathways for separated charge carriers. Structured surfaces of the selective electrode on the lower microscale further allow to enhance the optical absorption of the thin film components due to light trapping. Two different ways of artificial structuring are under investigation: Using anodized aluminum oxide hard templates as stamps with controlled dimensions, nanostructured organic layers can be realized on ITO support. As shown recently, a sufficient replica of the template structure can be transferred into the organic compound[1]. Alternatively, master molds with nanoscale channels are used for the imprinting routine of the PEDOT:PSS layer. The shape of the imprinted structures is easily tunable by the concentration of an additional plasticizer. Depending on the structure dimensions the device efficiency of OPVs can be increased this way[2].

[1] Hesse et al., Nanotechnology, 22, 055303 (2011)

[2] Meier et al., DOI: 10.1039/C1JM13766B