Figure 2: Morphological characterization data.
From: Aggregation and morphology control enables multiple cases of high-efficiency polymer solar cells
(a) Two-dimensional (2D) GIWAXS pattern of a pure PffBT4T-2OD film. (b) 2D GIWAXS pattern of a PffBT4T-2OD:PC61PM. (c) R-SoXS profiles in log scale for four samples of PffBT4T-2OD:fullerene blends. Blue line: PC61BM; red line: PC71BM; black line: ICMA; green line: PC61PM. (d) (010) diffraction peak (obtained from XRD) of PffBT4T-2OD pure films spun at different rates, the inset indicates the (010) coherence length (CL) of the films. (e) UV-Vis absorption spectra of PffBT4T-2OD:PC61PM blend films obtained with different spin rates and substrate temperatures. Blue line, 5,000 r.p.m./110 °C; dark green line, 3,000 r.p.m./100 °C; red line, 1,000 r.p.m./90 °C; pink line, 800 r.p.m./80 °C; emerald line, 600 r.p.m./70 °C. All spectra are normalized based on the intensity of their 0-1 transition peak (at ~640 nm) to highlight the change of the intensity of 0-0 transition peaks.
