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UV-LED assisted ethanol sensing properties of NiO modified ZnO thick film at low temperatures

Sensor based on thick film of ZnO hollow microspheres with average thickness about 200 µm were obtained by spin-coating technique. The surface of the film was modified by NiO through dropping solution of Ni(NO3)2 onto the film to reach mass ratio of Ni(NO3)2 to ZnO of 1 %. Subsequently, the obtained film was calcined at 500 oC for 2 h. Upon calcination, Ni(NO3)2 would reduce to NiO. | UV-LED assisted ethanol sensing properties of NiO modified ZnO thick film at low temperatures