Contents: (Adv. Mater. Interfaces 7/2016)

TiO 2 |Ag solid state plasmonic solar cells are shown to give effi ciencies of 0.2%, which is high for these types of cells.The Ag is sputtered directly on to the TiO 2 , which has a rough surface, enabling formation of Ag nanoparticles.Quantum effi ciency measurements and electrical analysis reveal that the "hot" electron mechanism is responsible for the photovoltaic activity.