We demonstrate covering of GaP NWs with a thin nanocrystalline Ga-doped ZnO layer using RF sputtering. Compact GaP NW/ZnO layer structure was created by alternation of ZnO deposition with ZnO etching using Ar ions. Antireflection behaviour of different types of structures consist of GaP NWs covered with nanocrystalline ZnO layer was demonstrated.