Hybrid light-emitting diodes based on flexible sheets of mass-produced ZnO nanowires

摘要

We report the production of free-standing thin sheets made up of mass-produced ZnOnanowires and the application of these nanowire sheets for the fabrication of ZnO/organichybrid light-emitting diodes in the manner of assembly. Different p-type organicsemiconductors are used to form heterojunctions with the ZnO nanowire film.Electroluminescence measurements of the devices show UV and visible emissions. Identicalstrong red emission is observed independent of the organic semiconductor materials used in thiswork. The visible emissions corresponding to the electron transition between defect levelswithin the energy bandgap of ZnO are discussed.