Fig. 3: Intermolecular packing modes of CH20, CH21 and CH22.
From: A rare case of brominated small molecule acceptors for high-efficiency organic solar cells
π-π stacking distances of interlayer involving with all the studied intermolecular packing modes of a, b CH20, c, d CH21 and e, f CH22, respectively. Red, gray and blue colors highlight the end groups (E), bridge unit (b) and central unit (C), respectively.
