Fig. 1: Structural analysis for the thin films of DCDA polymers.
From: Increasing donor-acceptor spacing for reduced voltage loss in organic solar cells
a Chemical structure of the DCDA polymers with different lengths of alkyl chain linkers. b TEM image and c GIWAXS pattern from the thin film based on PBDB-T-NDI(C18). d Schematic representation of the molecular arrangement in the ordered phases of the thin film based on PBDB-T-NDI(C18).
