Surface Plasmon-mediated Luminescence in Organic Field-effect Transistors

摘要

We prepared novel type light-emitting organic field-effect transistors (LEOFETs) based on pentacene, in which thin metal wires were inserted between the source and drain electrodes of Au/Cr on SiO_2/Si substrates. The luminescence was observed along the inserted metal wires isolated electrically from the drain, source and gate electrodes. The luminescence spectrum was identical to that of pentacene films and its intensity was proportional to the channel current. The light emission was thought to be generated through energy transfer to the pentacene films from plasmon excited on metal surfaces by current injection.