Dresden 2014 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 37: Poster Session 2

CPP 37.12: Poster

Mittwoch, 2. April 2014, 15:00–19:00, P3

In situ x-ray studies of P3HT based bulk heterojunction (BHJ) solidification — •Christelle Kwamen¹, Eduard Mikayelyan¹, Panagiothis Karagiannidis², Stergios Logothetidis², and Souren Grigorian¹ — ¹Soft Matter Physics Group, University of Siegen,Siegen Germany — ²LTNF, Physics Department, Aristotle University of Tessaloniki, Tessaloniki Greece

Over the years, the performance of bulk heterojunction(BHJ) polymer solar cells has been shown to be dependent of the local morphology of the active layer. Many processing techniques have been explored to improve the structure of the BHJ layer, passing through solvent, concentration, mixture ratio, thermal annealing etc.(1)

Grazing incidence X-ray diffraction measurements performed on annealed and pristine P3HT:PCBM films showed a strong enhancement of P3HT structure making the (020) peak of π-π stacking visible after annealing. For in situ research, we monitored the solidification of BHJ films where the current- voltage characteristics where recorded simultaneously with GIXD patterns in real time during film formation(2). The structural properties of P3HT-based BHJ and their correlation to electrical performance will be discussed.

This work was partly supported by BMBF (project Nr 05K13PS4).

References: (1)*Al.Ibrahim, M. et al., Appl.Phys.Lett.86 201120(2005) (2)*Grodd L. et al., Macrom. Rapid Comm. 2012, 33(20),1765-1769