Photocrosslinkable liquid-crystalline polymers for stable photovoltaics by adjusting side-chains spacing and fullerene size to control intercalation

► The performances of heterojunction solar cells are significantly influenced by the interpenetrating nanostructure. ► The nature of the molecular packing affects the optimum blend ratios and interpenetrating nanostructure. ► The large-scale phase separation occurs in some polymer:fullerene blend ratios.