Dresden 2014 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

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

CPP 19.37: Poster

Dienstag, 1. April 2014, 09:30–13:00, P1

Aggregation Control in Organic Photovoltaic Blends — •Juan Felipe Martínez Grisales^{1, 2}, Eva M. Herzig¹, and Peter Müller-Buschbaum² — ¹TU München, MSE, Lichtenbergstr. 4, 85748 Garching — ²TU München, Physik-Department, LS Funktionelle Materialien, James-Franck-Str. 1, 85748 Garching

Since the discovery of conductive polymers, organic photovoltaics has turned into a very active field of research. This is owed to the potential of the inexpensive and widely available energy of the sun and the wide range of possible applications [1]. To fully exploit organic photovoltaics for efficient energy conversion processes the morphology of the active layer is a crucial parameter [2]. For example, the charge transport properties closely depend on the aggregation state, i.e. the nanomorphology of the polymers. Exploiting the properties of selective solvents we present a method to control the aggregation of a binary photovoltaic blend via the addition of a co-solvent. The system is thoroughly investigated using microscopy, spectroscopy and scattering to gain fundamental understanding on the processes involved and to relate these to solar cell performance. [1] E. M. Herzig, P. Müller-Buschbaum, Acta Futura, 2013, 6, 17-24 [2] M. A. Ruderer, et al., Soft Matter, 2011,7, 5482-5493