Fig. 3.

Non-contact mode AFM 2D height images of BHJ films based on a–c in CB–DIO3% solvent and d in CB–CN3% solvent, a P-IDI-SVS(CB):PC₇₀BM, b P-IDI-SVS(CF):PC₇₀BM, c, d P-IDI-SVS(THF):PC₇₀BM. Non-contact mode AFM 3D height images of BHJ films based on based on e–g in CB–DIO3% solvent and h in CB–CN3% solvent, e P-IDI-SVS(CB):PC₇₀BM, f P-IDI-SVS(CF):PC₇₀BM, and g, h P-IDI-SVS (THF):PC₇₀BM