In this paper we have reported the electrical properties of Al/ZnPc-TiO2/Al thin film device. The composite layers were prepared by the vacuum evaporation of ZnPc and sol-gel-coated TiO2. The current voltage characteristics are found to be Ohmic and non-Ohmic at low field and high field, respectively. The charge transport conduction appears to be Poole-Frankel type of conduction. The total number of interface states, which is responsible for the dispersion of capacitance, is found to be increasing with increase in bias voltage. (c) 2005 Elsevier B.V. All rights reserved.