Dresden 2017 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 64: Poster: Photovoltaics and Optics

HL 64.20: Poster

Mittwoch, 22. März 2017, 15:00–19:00, P1C

Nongeminate Recombination in Organic Solar Cells — •Christopher Wöpke, Christoph Baumbach, and Carsten Deibel — Institut für Physik, Technische Universität Chemnitz, 09126 Chemnitz, Germany

Despite ongoing efforts to improving the overall efficiency of organic solar cells, nongeminate recombination - the dominant performance limiting mechanism - is still not fully understood. Nongeminate recombination depends strongly on the solar cell morphology.

The aim of this study is to explore the relationship between recombination and the morphology of P3HT:PCBM bulk-heterojunction organic solar cells. In a first step the charge carrier concentrations and recombination rates of devices with systematically varied morphologies will be studied with the method of time-delayed collection field (TDCF). Analysing the TDCF transients an approximated mean charge carrier mobility will be extracted. We will present our progress in finding the relationship between the devices morphology and the parameters recombination rate, charge-carrier mobility and concentration.