Effect of intrachain configuration disorder on the exciton delocalization in π-conjugated polymers

Both interchain stacking disorder (a) and intrachain configuration disorder (b) intrincially exist in polymer-based D/A photovoltaic system. Different from the interchain stacking disorder, the intrachain configuration disorder is found to play crucial roles in facilitating the exciton delocalization, which consequently contributes to the ultrafast charge separation phenomenon.189