Regensburg 2010 – scientific programme
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 27: Poster: Organic Electronics and Photovoltaics
CPP 27.19: Poster
Wednesday, March 24, 2010, 17:30–19:00, Poster C
Influence of electron transport on the efficiency of polymer-based solar cells — •Viktor Kuxhaus1, Frank Jaiser1, Dieter Neher1, and Frank Voges2 — 1Institute of Physics and Astronomy, University Potsdam, Karl-Liebknecht-Str. 24-25, 14476 Potsdam, Germany — 2Merck KGaA, 64271 Darmstadt, Germany
Recently, we showed that the mobility of electrons in polymer-based solar cells has a large influence on the overall performance of such devices [1]. Here, we investigate the correlation between electron mobility and charge generation effciency in organic bilayer solar cells for a series of electron transporting materials (ETMs) with comparable HOMO and LUMO levels. The electron mobility was measured by transient electroluminescence. Here, a thin M3EH-PPV was used as a sensing layer. The interface between M3EH-PPV and ETM acted as a recombination zone of electrons transported through the ETM layer and holes that are blocked at the interface. Therefore, the electron mobility can easily be determined from the onset of M3EH-PPV emission which is spectrally well separated from the ETM emission. To determine the charge generation efficiency, the different ETMs were combined in bilayer solar cell with PFB as donator.
[1] M. Schubert, R. Steyrleuthner, S. Bange, A. Sellinger, D. Neher, pss(a), DOI: 10.1002/200925312