Figure 4: Comparative studies on structurally similar polymers.
From: Aggregation and morphology control enables multiple cases of high-efficiency polymer solar cells
(a) Chemical structures of PffBT4T-1ON, PffBT4T-3OT and PffBT4T-2DT. (b) Normalized UV-Vis absorption spectra of PffBT4T-1ON and PffBT4T-3OT in a 85 °C DCB solution and in a DCB solution at room temperature as indicated on the plot. (c) Two-dimensional GIWAXS pattern of a pure PffBT4T-1ON film. (d) Uneven film formed by the PffBT4T-3OT solution forming a gel before being able to be spun. (e) R-SoXS profiles in log scale for PffBT4T-2OD and PffBT4T-2DT, the inset indicates the domain size and relative purity.
