Figure 7. (a-c) The 2D GIXRD patterns for PffBT4T-2OD:N2200 blend film at 55, 95, 120 °C. Reproduced from[112]. (d) The region enclosed by dashed boundaries signifies the formation of an interpenetrating network. The beginning of P(NDI2OD-T2) crystallization is indicated by the red line, and the domain size diminishes following the phase separation that occurs within the crystallization-constrained phase. Reproduced from[113]. (e) PL profiles of blend films at different temperatures. Reproduced from[113].