ZnO:(Ag,N)ZnO p-n homojunction was fabricated by depositing a ZnO:(Ag,N) film on vertically aligned ZnO nanorods (NRs). The homojunction is able to work as a self-powered device due to the photovoltaic effect, and the ZnO NRs play an important role in the photovoltaic conversion process. Current-voltage (I-V) characteristic shows a turn-on voltage of similar to 3 V and a rectification ratio of 1.3 x 10(2) at 5 V. Spectral responsivity exhibits an UV-to-visible rejection ratio of 1 x 10(2). The photocurrent rise and decay times are 7 and 45 ms, respectively. These results indicate the ZnO:(Ag,N)/ZnO homojunction is an attractive candidate for high-performance self-powered UV photodetectors. (C) 2014 Elsevier B.V. All rights reserved.