 This paper examined the properties of zinc oxide, ZNO, nanorods and their potential use in white light emitting diodes, LEDs. It was found at the presence of deep-level centers in the nanorod structure caused the emission of visible light. By combining the nanorods with various P-type materials such as PCC, PgN, or polymer, it was possible to create heterojunctions which could then be used to produce white light LEDs. The electroluminescence of the LEDs was analyzed and the deep-level centers responsible for the emission were identified. This article was authored by Magnus Willender, Omer Neur, Jamil Ronasithoff and others.