Ultraviolet　(UV)　detectors　have　a　wide　range　of　commercial　applications.　However,　most　UV　light　detectors　require　an　external　power　source,　which　limits　their　applications　as　portable　and/or　wearable　electronics.　In　this　work,　a　self-powered　UV　detector　based　on　triboelectric　nanogenerator　(TENG)　technology　is　demonstrated.　Nano-ripple　zinc　oxide　(ZnO)　film　acting　as　both　UV-sensitive　and　triboelectric　material　was　synthesized　by　a　simple　sol-gel　method.　The　self-powered　UV　sensor　detected　UV　irradiation　without　an　external　power　source.　The　open-circuit　voltage　of　the　device　under　UV　irradiation　was　130　V,　which　was　2.3　times　higher　than　the　output　of　the　device　in　the　dark.　Possible　operating　mechanisms　of　the　device,　which　is　based　on　the　contact　electrification　process,　are　described.