Fig. 5: GIWAXS and AFM analysis of PTB7-Th:BTPV-4F and PTB7-Th:BTPV-4F:PC₇₁BM films.

2D GIWAXS patterns of (a) binary blend film of PTB7-Th:BTPV-4F and (b) ternary blend film of PTB7-Th:BTPV-4F:PC₇₁BM. AFM images of (c) PTB7-Th:BTPV-4F and (d) PTB7-Th:BTPV-4F:PC₇₁BM films.