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Atomic force microscopy (AFM) micrographs (5 × 5 µm) of thin films of 1:1 TQ1:PC70BM (a–c) and 1:3 TQ1:PC70BM (d–f) spin-coated from chloroform (CF) (a,d), chlorobenzene (CB) (b,e), and ortho-dichlorobenzene (oDCB) (c,f). Scale bar indicates 1 µm. Surface roughness (RMS), as well as the corresponding height scale, is added to each image.
