Fig. 3. Microstructural and time resolved analysis of PffBT4T-2DT based films. (A) Integrated scattering intensity of the as cast PffBT4T-2DT:FBR and PffBT4T-2DT:PCBM films from grazing incident wide angle X-ray scattering (GIWAXS) measurements. (B) Transient absorption spectra of neat PffBT4T-2DT and PffBT4T-2DT:FBR films excited at 680 nm and probed at 1300 nm. The blend has much shorter exciton lifetime (48 ps) than the neat polymer (237 ps).
