Regensburg 2013 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 32: Poster: Organic Semiconductors

CPP 32.7: Poster

Wednesday, March 13, 2013, 16:30–18:30, Poster C

Systematic investigation on ternary bulk heterojunction solar cells based on PTB7:PC70BM — •Christian Jendrzejewski, Shuai Guo, and Peter Müller-Buschbaum — TU München, Physik-Department, LS Funktionelle Materialien, James-Franck-Str. 1, 85748 Garching, Germany

Organic solar cells hold great promise for future applications in photovoltaics as they have several advantages, like the potentially lower production costs, much lower weight and flexibility in comparison to inorganic solar cells. In the present investigation the new, high efficient chlorobenzene based PTB7:PC71BM bulk heterojunction system are prepared and investigated with the addition of different third components. These kind of ternary systems have shown a promising result, which combines the advantages of the host material as well as the third component, and therefore improves the final power conversion efficiency. The inner structure of the ternary blend films is probed via X-ray reflectivity (XRR) and grazing incidence small angle X-ray scattering (GISAXS). The surface morphology is investigated with atomic force microscopy (AFM) and scanning electron microscopy (SEM). Via integrating XRR, GISAXS, AFM and SEM data, the inner 3D structure of the ternary films is obtained. As a consequence, the correlation between the nano-morphology of the films and the efficiency of the polymer- based solar cells is addressable.