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DS: Fachverband Dünne Schichten

DS 44: Postersession II

DS 44.18: Poster

Donnerstag, 23. März 2017, 17:00–19:00, P1C

Recombination prefactor in organic bulk heterojunction solar cells — •Jȩdrzej Szmytkowski — Faculty of Applied Physics and Mathematics, Gdańsk University of Technology, Gdańsk, Poland

In this work, we report on theoretical studies of reduced bimolecular recombination in organic donor–acceptor bulk heterojunction structures. The values of the Langevin recombination prefactor have been calculated as a function of several quantities, including temperature, external electric field and charge carrier concentration. In addition, an effect of exciton–charge carrier interaction has been taken into account to describe changes of this prefactor. We have also investigated an influence of disorder on the nongeminate recombination in organic systems with an exponential density of states. Presented results can explain mechanisms which cause a loss of photocurrent in organic solar cells.