Enhanced photoresponse of ZnO nanorods-based self-powered photodetector by piezotronic interface engineering

A Pt/Al2O3/ZnO based MIS heterojunction self-powered photodetector has been developed. The piezotronic effect and introducing an insulating layer are used as two effective strategies for interface engineering to modify the band structure of the MIS heterojunction. The piezopolarization modulates the built-in electric field and the Schottky barrier height at the interface and improves the photoresponse properties of a self-powered photodetector.276