CuO-1n(2)O(3) based nanocomposites were synthesized through a facile wet chemical approach and their structural/morphological characteristics were investigated using X-ray diffraction and transmission electron microscopic measurements, respectively. The composites were drop cast over transparent conducting substrates (from colloidal media) at room temperature to fabricate the working electrodes for electrochemical studies. The charge transfer resistance, nature of charge carriers, flat band potential and carrier density of CuO-In2O3 was determined using Nyquist and Mott-Schottky plots. The potential of solution processed CuO-In2O3 nanocomposites for electronic functions was evaluated by fabricating heterojunction diodes based on p-CuO-In2O3/n-Si architectures. Their diode characteristics revealed an excellent rectifying behaviour. (C) 2015 Elsevier B.V. All rights reserved.