Ag3PO4 films were electrodeposited onto indium-tin oxide (ITO) coated glass through electrochemical generation of acid in a stable aqueous solution contained silver ammonia complexes and sodium phosphate at room temperature and pH 10. After the released H+ ions lower the local pH at ITO working electrode, Ag+ ions were dissociated from silver ammonia complex and then reacted with PO43- to form Ag3PO4 deposits on ITO. The morphologies of electrodeposited Ag3PO4 films depended on the applied potentials: trisoctahedral like structure obtained at 1.2 V versus Ag/AgCl and tetrahedral structure obtained at 1.6 V versus Ag/AgCl. The absorption spectra of the electrodeposited Ag3PO4 films were measured and they had direct and indirect band gaps of 2.43 eV and 1.99 eV, respectively. The electrodeposited Ag3PO4 films produced stable sensitive photocurrent in response to visible light irradiation at pH 7. (C) 2016 The Electrochemical Society. All rights reserved.