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. 2021 Nov 18;12:6679. doi: 10.1038/s41467-021-26995-1

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© The Author(s) 2021

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Fig. 1 — 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).