Figure 2

Surface morphology of the studied blends.
Large-area (left) and high resolution (right) IC-AFM height images of thin films of PBDTTT-C:PC71BM prepared with different amounts of DIO.

Surface morphology of the studied blends.
Large-area (left) and high resolution (right) IC-AFM height images of thin films of PBDTTT-C:PC71BM prepared with different amounts of DIO.