In this study, we aimed to enable the use of high-quality p-type Cu2O-obtained by thermal oxidation of copper foils-to be used as a photoanode through the application of chargeselective contacts, drawing inspiration from the work of Gurudayal et al. where selective contacts enabled the use of n-type Si to be used as a photocathode for PEC carbon dioxide reduction . Thermal oxidation of Cu metal foil facilitates the synthesis of a semiconductor sheet without the need for an additional conductive substrate, allowing the production of highly crystalline Cu2O through high-temperature synthesis (>1000 °C). Furthermore, judicious selection of an electron-selective contact composed of Ga2O3 and TiO2, along with the hole transport layers Al2O3 and Au, were employed to provide effective charge separation and high solar water oxidation photocurrents. Our approach achieved a photocurrent density of 8.65 mA cm -2 at 1.23 V vs. the reversible hydrogen electrode (RHE) for solar water oxidation. To the best of our knowledge, this is the highest value reported for metal oxide photoanodes. Based on these results, we present a design principle for developing high performance p-type Cu2O photoanodes towards the fabrication of practical PEC and photocatalytic systems.