Regensburg 2016 – scientific programme

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O: Fachverband Oberflächenphysik

O 65: Organic Photovoltaics and Electronics

O 65.3: Talk

Wednesday, March 9, 2016, 15:30–15:45, H2

Mobility-limited recombination models for organic solar cells — •Alexander Wagenpfahl and Carsten Deibel — Institut für Physik, Technische Universität Chemnitz, 09126 Chemnitz, Germany

Recent results of kinetic Monte Carlo simulations indicate that recombination of charge carriers in organic semiconductor blends show a strong dependence on the domain size of neat material phases [1]. Consequently, the Langevin recombination model does not generally apply and has to be modified by the geometric mean of the charge carrier mobilities. Here, we present drift–diffusion simulations to reveal the influence of such a recombination model in comparison to the Langevin theory. We discuss differences in the quality of the solar cell current–voltage characteristics and distinguish the different processes which lead to a reduction of the observed recombination rate [2].

Phys. Rev. Lett. 114, 136602 (2015)
Phys. Rev. B 80, 075203 (2009)