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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 19: Poster Session 1 (joint session with BP)

CPP 19.39: Poster

Dienstag, 1. April 2014, 09:30–13:00, P1

Influence of electrochemical grown thiophenes at the anode interface of bulk hetero structure organic solar cells studied by photo-CELIV. — •Arne Hendel, Sidhant Bom, and Veit Wagner — Jacobs University Bremen, 28759 Bremen, Germany

The charge carrier mobility and the charge carrier density in the active layer play a crucial role in organic solar cells for the device performance. The need for long lasting and stable solar cells requires an understanding of the transport and degradation processes of the cell. By the technique of charge carrier extraction by linearly increasing voltage with an additional light source (photo-CELIV) the charge transport, the lifetime and recombination dynamics in the organic BHJ is studied, which gives insight into the charge carrier creation and extraction. An additional layer of thiophenes at the interface of PDOT-PSS and P3HT-PCBM grown by electropolymerization is beneficial to the solar cell performance. The effect of such layers is studied by photo-CELIV analysis and the reason for improvements is discussed.