Defect and its dominance in ZnO films: A new insight into the role of defect over photocatalytic activity

- Defective ZnO bilayer films were prepared by cold plasma treatment technique and dip-coating method.
- The introduced defect remarkably enhanced the photocatalytic activity.
- The influence of defect on both photodegradation and photoreduction activities was investigated.
- The dominance of defect was studied and stabilization of defect was achieved.