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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 24: Poster: Organic Semiconductors

CPP 24.11: Poster

Mittwoch, 28. März 2012, 11:00–13:00, Poster A

Polyethylene induced structural modification in polymer blends used in photovoltaic cells — •Ammara Akhtar, Eva M. Herzig, and Peter Müller-Buschbaum — TU München, Physik-Department, LS Funktionelle Materialien, James-Franck-Str. 1, 85748 Garching, Germany

Photovoltaic cells consisting of organic semiconducting polymer poly(3-hexylthiophene) (P3HT): fullerene derivative PCBM blends have attracted much interest over the last two decades. In order to improve the morphology of organic materials in solar cells, a third component such as the commodity polymer polyethylene can be introduced. It is reported that among different commodity polymers, high density polyethylene (HDPE) is a promising material for organic solar cells because of an observed improvement in the photocurrent generation efficiency of the system [1]. Furthermore, it is also expected that, the use of HDPE instead of low density polyethylene (LDPE) provides a better control to the microstructure in the final photovoltaic cell because of its highly crystalline nature [2]. In order to improve the interfacial morphology of the P3HT:PCBM blend by adding HDPE spin coating at elevated temperature is necessary. A structural analysis of the ternary system is being carried out with the aid of spectroscopy and scattering experiments. [1] Ferenczi et al., Adv. Mater. 23, 4093 (2011) [2] Goffri et al., Nat.Mater. 5, 950 (2006)