Poly (methyl methacrylate) (PMMA) thin film (TF) was employed on nanowires (NWs) to fabricate organic–inorganic hybrid UV photodetector (PD), and its properties were studied and compared with bare NW-based PD. A maximum photoresponsivity of and a maximum external quantum efficiency of were observed in the UV region at 370 nm (). Enhanced photon absorption was observed in the hybrid detector. The TF of PMMA, which is a -conjugated polymer, increased the carrier lifetime and reduced recombination rate. The PMMA NWs hybrid UV detector shows excellent rectification, and light current/dark current ratio was measured to be times in comparison to bare NWs photodetector in the reverse bias condition from to .