Interfacial interaction and intense interfacial ultraviolet light emission at an incoherent interface.

ABSTRACT: Incoherent interfaces with large mismatches usually exhibit very weak interfacial interactions so that they rarely generate intriguing interfacial properties. Here we demonstrate unexpected strong interfacial interactions at the incoherent AlN/Al₂O₃ (0001) interface with a large mismatch by combining transmission electron microscopy, first-principles calculations, and cathodoluminescence spectroscopy. It is revealed that strong interfacial interactions have significantly tailored the interfacial atomic structure and electronic properties. Misfit dislocation networks and stacking faults are formed at this interface, which is rarely observed at other incoherent interfaces. The band gap of the interface reduces significantly to ~ 3.9 eV due to the competition between the

SUBMITTER: Yan X 

PROVIDER: S-EPMC10185513 | biostudies-literature | 2023 May

REPOSITORIES: biostudies-literature