fig1

Figure 1. (A) Chemical structure of P(g2T-T); (B) Schematic diagram of blade coating; (C-F) AFM height images of single-solvent system-processed blade-coating films at rates of (C) 0.3 mm/s, (D) 0.9 mm/s, (E) 1.8 mm/s, and (F) 3.0 mm/s; (G-J) AFM height images of dual-solvent system-processed blade-coating films at rates of (G) 0.3 mm/s, (H) 0.9 mm/s, (I) 1.8 mm/s, and (J) 3.0 mm/s. P(g2T-T): Poly[3,3′-bis[2-[2-(2-methoxyethoxy)ethoxy]ethoxy]-2,2′:5′,2′′-terthiophene-5,5′′-diyl]; AFM: atomic force microscopy; RMS: root mean square.