Figure 1

(Left) Atomic force microscopy (AFM) images of the p-DTS(FBTTh2)2:PC71BM films (a) as prepared (c)thermally annealed at 100 °C. (e) with 0.25 vol% DIO (g) with 0.25 vol% DIO thermally annealed at 80 °C (Right) High resolution images of p-DTS(FBTTh2)2:PC71BM films.