Vibrational Properties of Doped P3HT Chains in Solution: Insight into the Doping Mechanism from Infrared IRAV and Raman RaAV Bands.

The intensity of the band at 1430 cm −1 (orange symbols) shows an increasing trend with dopant concentration: as doping increases, non-doped domains are replaced by doped crystals and co-crystals with a dense polarons population, which contribute to the rise of the 1430 cm −1 component (orange region of Scheme 2 b).

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