Dresden 2014 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 43: Organic Electronics and Photovoltaics IV (CPP jointly with DS, HL, O)
O 43.2: Vortrag
Mittwoch, 2. April 2014, 09:45–10:00, ZEU 260
Controlling nanomorphology in bulk heterojunction solar cells via addition of third component — •Eva M. Herzig1, Ammara R. Akhtar2, Anna Naumann2, Shuai Guo2, Gregory Tainter2, Jianqi Zhan2, Jan Perlich3, Stephan V. Roth3, Christine M. Papadakis2, and Peter Müller-Buschbaum2 — 1TU München, MSE, Lichtenbergstr. 4, 85748 Garching — 2TU München, Physik-Department,, James-Franck-Str. 1, 85748 Garching — 3DESY, Notkestr. 85, 22603 Hamburg
Nanomorphology and effciency of organic solar cells are closely linked. It is therefore desirable to have control over the self-assembly process responsible for the morpholgy formation of the active material. Employing grazing incidence small and wide angle x-ray scattering(GISAXS & GIWAXS) as well as spectroscopy and microscopy methods allows us to characterize organic thin films on the nanoscale with high statistical relevance. Using these methods we thoroughly investigate the morphological changes upon the addition of a third polymeric component showing that the self-assembly process is altered. We find that the amount of the third component controls the phase separation in the bulk heterojunction active layer. Adjusting the preparation route to support crystallization of the active material leads to an increased solar cell performance for a tuned ternary solar cell system.