Berlin 2015 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 84: Focus Session (CPP with HL): Hybrid photovoltaics and perovskites II

HL 84.8: Talk

Thursday, March 19, 2015, 17:30–17:45, C 130

Charge Transport in Dye-sensitized Solar Cells: What do J-transients really depend on? — •Frank Marlow, Abigail Hullermann, and Lisanne Messmer — MPI für Kohlenforschung, 45470 Mülheim an der Ruhr, Germany

J-transients (electrical current transients) following a laser excitation are considered as a powerful tool for the understanding of the action of dye-sensitized solar cells. In the last years, a sophisticated model for their understanding has been established which, however, turns out to be in contradiction with a number of experimental findings including the J-signal shape and the signal dependences on experimental parameters. It is especially remarkable that there are the always delays of the electrical signal after the laser excitation and that the possible diffusion times do not follow an Einstein diffusion relation which is a-priori assumed in many works.