Abstract:The π–π
stacking robustness of the photoactive
layer is key to maintaining efficiency of organic photovoltaics (OPVs).
We show local disruption more than 2 Å on average in the π–π
stack of crystalline poly(3-hexylthiophene) (P3HT), one of the most
common materials used in OPVs, through formation of a chainlike water
structure with limited growth and mostly pentameric cluster ends.
In contrast, a 3D aggregated water cluster with constant growth is
observed in amorphous P3HT. Dynamics of water molecules that fo… Show more
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