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Tiziano Agostinelli, Samuele Lilliu, John G. Labram, Mariano Campoy-Quiles, Mark Hampton, Ellis Pires, Jonathan Rawle, Oier Bikondoa, Donal D. C. Bradley, Thomas D. Anthopoulos, Jenny Nelson and J. Emyr Macdonald Real-Time Investigation of Crystallization and Phase-Segregation Dynamics in P3HT:PCBM Solar Cells During Thermal Annealing Advanced Functional Materials 21

Version of Record online: 7 MAR 2011 | DOI: 10.1002/adfm.201002076

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The evolution of morphology in poly(3-hexylthiophene) (P3HT):[6,6]-phenyl C61-butyric acid methyl ester (PCBM) bulk-heterojunction solar cells during thermal annealing is studied by in situ grazing incidence X-ray diffraction, ellipsometry, and field-effect-transistor measurements. We conclude that the solar-cell performance initially improves thanks to the crystallization of the polymer chains, and then to the diffusion and aggregation of fullerene molecules.

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