Fig. 4: Morphological characterization.
From: High-performing organic electronics using terpene green solvents from renewable feedstocks

a,b, AFM height images (a) and 2D GIWAXS patterns (b) of the films obtained from different terpene-based formulations and CF:DIO. Scale bar in AFM images is 250 nm. qx–y and qz denote X-ray scattering in the IP and OOP directions. CPS, counts per second. c,d, Corresponding GIWAXS profiles in the IP (c) and OOP (d) directions. e, Integrated peak area in the OOP and IP directions comparing the crystallinity for the donor (100 lamellar) and acceptor species (π–π stacking) for each terpene-based formulation.