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Christian Müller, Mahdieh Aghamohammadi, Scott Himmelberger, Prashant Sonar, Miquel Garriga, Alberto Salleo and Mariano Campoy-Quiles One-Step Macroscopic Alignment of Conjugated Polymer Systems by Epitaxial Crystallization during Spin-Coating Advanced Functional Materials 23

Version of Record online: 3 JAN 2013 | DOI: 10.1002/adfm.201202983

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Macroscopic spherulite-like structures of the conjugated polymer poly(3-hexylthiophene) (P3HT) grow directly during spin-coating. This is achieved by processing P3HT or P3HT:fullerene bulk heterojunction blends from a mixture of the crystallizable solvent 1,3,5-trichlorobenzene and a second carrier solvent such as chlorobenzene. Epitaxial growth of the polymer on solidified solvent crystals gives rise to circular-symmetric, spherulite-like structures that feature a high degree of anisotropy.

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