Berlin 2012 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

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

CPP 6.11: Poster

Monday, March 26, 2012, 17:30–19:30, Poster A

Influence of PEDOT:PSS on the Morphology of P3HT:PCBM:PSS Solar Cells — •Ben Stafford, Klaus Wagenbauer, Eva M. Herzig, and Peter Müller-Buschbaum — TU München, Physik-Department, LS Funktionelle Materialien, James-Franck-Str. 1, 85748 Garching, Germany

In organic photovoltaics the binary system poly(3-hexylthiophene) (P3HT) and phenyl C61-butyric acid methylester (PCBM) is well known for the active layer. By adding a third component, in our case polystyrenesulfonate (PSS), the performance of a solar cell can be improved. [1] PSS has no conductive or absorbing properties, consequently it must influence the morphology of the ternary system as compared with the two component system. Indeed, we have observed an ordering effect on P3HT when adding PSS to the binary blend. Of great interest is the interface between PEDOT:PSS and the active layer and its influence on the P3HT morphology. To optimise device performance different layer thicknesses of the PEDOT:PSS blocking layer are examined via electrical characterization.

[1] Kim et al., Solar Energy Materials and Solar Cells, 92:1188 (2008)