1-s2.0-S1566119918305172-fx1_lrg Published on 04/04/2021 at 1926 × 886 in 1-s2.0-S1566119918305172-fx1_lrg Atomic layer deposition of ZnO electron transporting layers directly onto the active layer of organic solar cells Atomic layer deposition of ZnO electron transporting layers directly onto the active layer of organic solar cells