Organic ultraviolet (UV) light-sensitive photovoltaic (PV) diodes, based on 4, 4', 4"-tris(2-methylphenyl phenylamino) triphenylamine (m-MTDATA) as an electron donor and copper phthalocyanine (CuPc) as acceptor, have been fabricated. The PV diode exhibits high open-circuit voltage (V-OC) of 1.05 V under illumination of 365 nm UV light with 1.7 mW/cm(2), although the CuPc was generally used as electron donor in other PV diodes. And the short-circuit current (I-SC) of 54.6 mu A/cm(2), fill factor (FF) of 0.304 and power conversion efficiency (eta(e)) of 1.03% are respectively achieved. This diode can accurately detect the UV radiation according to photo-generated voltage signal. (c) 2005 Elsevier B.V. All rights reserved.