Spatial degradation mapping and componentwise degradation tracking in polymer-fullerene blends

Emil Bøje Lind Pedersen, Thomas Tromholt, Morten Vesterager Madsen, Arvid P.L. Böttiger, M. Weigand, Frederik C Krebs, Jens Wenzel Andreasen

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Abstract

Using X-ray absorption the effects of photodegradation in active layer materials for polymer solar cells are investigated. Through the observation of changes in the X-ray absorption energy spectra the degradation of the individual components is tracked in blends of poly-3-hexyl-thiophene (P3HT) and C60 butyric acid methyl ester (PCBM). The degradation rates in the blend are decreased by a factor of 3 for P3HT and by a factor between 1.1 and 2.3 for PCBM compared to the pure materials. For P3HT, degradation is resolved spatially using scanning transmission X-ray microscopy and the photodegradation process is found to be intrinsically homogeneous at the nanometer scale.
Original languageEnglish
JournalJournal of Materials Chemistry C
Volume2
Pages (from-to)5176-5182
ISSN2050-7526
DOIs
Publication statusPublished - 2014

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