Roll-to-roll solvent annealing of printed P3HT : IC_XA devices.

These UV-Vis spectra show a clear trend as the chloroform fraction increases in the solvent mixture with a distinct shoulder appearing at ∼600–620 nm; indicating polymer ordering associated with an increase in domain size and charge carrier mobility. 21 Furthermore, a redshift of the main absorption peak from ∼480 nm to ∼520 nm is observ

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