The power conversion efficiency (PCE) of organic solar cells (OSCs) has improved steadily thanks to aggressive research and development efforts. On the other hand, improvement of device durability of OSCs is also an important factor for the practical application of OSCs. In this work, we studied the photodurability of inverted OSCs (i-OSCs) with ZnO prepared at 100 and 250 °C (ZnO 100 and ZnO 250 ). The photodurability of the ZnO 100 -based i-OSCs is much poorer than that of ZnO 250 -based ones. This could have originated from the higher photocatalytic activity of ZnO 100 , which relates to the number of surface OH groups and adsorbed water species. To suppress the photocatalytic activity of ZnO 100 , we fabricated a self-assembled monolayer (SAM) on the surface of ZnO 100 and found that the photodurability of the surface-treated ZnO 100 -based i-OSC was improved. This result indicated that the photodurability of i-OSC can be influenced by the surface conditions of ZnO and can be improved by SAM modification.

Naphthalene diimide (NDI)-incorporated helical thienoacene (1) was designed and synthesized. 1 forms a molecular packing struc-ture with two-dimensional π-π interaction assisted by the intermo-lecular C-H⋯O hydrogen bonding of the NDI...

Zinc oxide (ZnO) is a readily preparable n-type semiconducting material with excellent electron transport properties and good transparency. It was recently reported that low-temperature sol-gel processes for the preparation of...

The resistive switching voltages of SAM-modified ZnO films were shifted from that of bare ZnO (from 2.9 V to 1.6 V) depending on the surface dipole induced by SAMs, and the on/off ratio was also improved by SAM modification (from 102 to 104).