Fig. 4: Thin-film morphology of the neat films and blended films.

a 2D GIWAXS patterns, b in-plane and out-of-plane line-cut profiles from 2D GIWAXS data, c AFM height imgaes, and d The average fiber width of acceptor obtained from AFM-IR technique for PM6:NaO1, PM6:NaO2, and PM6:NaO3 blend films.