TiO2 arrays (TNAs) with different morphologies were synthesized on transparent conductive tin-doped indium oxide (ITO) and fluorine-doped tin oxide (FTO). Back-incident array TNA-based UV detectors were assembled. Effects of growth substrates on the morphologies of TNAs and the performance of UV detectors were investigated for the first time. The device based on the vertically aligned TNAs on FTO (TNFs) exhibited more excellent photoresponse properties than that based on the cluster-shaped TNAs on ITO (TNIs). This phenomenon can be ascribed to the easier and faster electron transport in the single crystallographic orientation TNFs. The outstanding performance also demonstrated the obvious superiority of TNFs in the application of UV detection. (C) 2014 Elsevier B.V. All rights reserved.