Ultrathin Reduced Graphene Oxide Films as Transparent Top-Contacts for Light Switchable Solid-State Molecular Junctions

A new type of solid‐state molecular junction is introduced, which employs reduced graphene oxide as a transparent top contact that permits a self‐assembled molecular monolayer to be photoswitched in situ, while simultaneously enabling charge‐transport measurements across the molecules. The electrical switching behavior of a less‐studied molecular switch, dihydroazulene/vinylheptafulvene, is described, which is used as a test case.