ZnO nanorod light-emitting diode (LED) and producing method thereof

A ZnO nanorod LED comprises a substrate, a p-GaN layer, a ZnO nanorod array, a graphene layer, an upper electrode and a lower electrode, wherein the p-GaN layer is produced on the substrate; the ZnO nanorod array is produced on one side of the p-GaN layer, and the other side of the p-GaN layer is a mesa; the graphene layer is produced on the ZnO nanorod array; the upper electrode is produced on an edge on one side of the graphene layer; and the lower electrode is produced on the mesa on one side of the p-GaN layer. The graphene has a visible light transmission ratio up to 97% as well as excellent electrical conductivity and mechanical properties, can naturally spread between nanorods, is not likely to crack and can perform good contact and connection functions, so that the graphene is a good transparent electrode material. Large-area continuous graphene which is produced by chemical vapor deposition is transferred above the ZnO nanorod array, and the graphene spreads out naturally while being supported by ZnO nanorods, forms an electrode layer of LED simply and performs the function of a current expansion layer simultaneously.