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Sarah T. Turner, Patrick Pingel, Robert Steyrleuthner, Edward J. W. Crossland, Sabine Ludwigs and Dieter Neher Quantitative Analysis of Bulk Heterojunction Films Using Linear Absorption Spectroscopy and Solar Cell Performance Advanced Functional Materials 21

Article first published online: 19 OCT 2011 | DOI: 10.1002/adfm.201101583

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P3HT aggregate morphology in P3HT:PCBMthin films is studied by analyzing the optical properties with a model developed by F. C. Spano. Films with non-optimized (CF cast) and nearly optimized initial morphologies (DCB cast, solvent-annealed) are thermally annealed directly at the target temperatures. Changes in the energetic disorder (σ), excitonic bandwidth (W) and degree of P3HT crystallinity are related to the glass transition range (light grey) and to the solar cell device performance.

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