Regensburg 2007 – wissenschaftliches Programm
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DS: Fachverband Dünne Schichten
DS 6: Organic Photovoltaics (SYOE 2)
DS 6.6: Vortrag
Montag, 26. März 2007, 17:15–17:30, H32
Nanomorphology of Poly[3-alkylthiophene] based Polymer/Fullerene Bulk Heterojunction Solar Cells — •Harald Hoppe1, Le Huong Nguyen2, Tobias Erb1, Serap Günes2, Gerhard Gobsch1, and N. Serdar Sariciftci2 — 1Institute of Physics, Ilmenau Technical University, Weimarer Str. 32, 98693 Ilmenau, Germany — 2Physical Chemistry - LIOS, Johannes Kepler University Linz, Altenbergerstr. 69, 4040 Linz, Austria
We report on nanomorphology evolution within poly[3-alkylthiophene]/[6,6]-phenyl C61-butyric acid methyl ester (P3AT/PCBM) blends upon film formation and subsequent thermal annealing. In detail, the influence of the P3AT side chain length on the extend of the polymer/fullerene phase separation is discussed for butyl, hexyl, octyl, decyl and dodecyl side groups. We apply atomic force microscopy (AFM), X-ray diffraction and optical spectroscopy to understand the underlying processes. Photovoltaic devices based on the different P3ATs have been processed and optimised. In conclusion a correlation between the achieved solar cell performance and the corresponding nanomorphology is drawn.