The synthesis of high energy-density liquid fuels from CO2 and H2O powered by sunlight has the potential to create a circular economy. Despite the progress in producing simple gaseous products, the assembly of unassisted photoelectrochemical devices for liquid multicarbon production remains a major challenge. Here, we assembled a standalone artificial leaf device by integrating an oxide-derived Cu94Pd6 electrocatalyst with perovskite-BiVO4 tandem light absorbers that couple CO2 reduction with water oxidation. The wired Cu94Pd6|perovskite-BiVO4 device provides a faradaic efficiency of ~7.5% for multicarbon alcohols (~1:1 ethanol and n-propanol), whereas the standalone artificial leaf produces ~1 µmol cm–2 alcohols after 20 h unassisted operation under AM1.5G irradiation with a rate of ~50 µmol h–1 gCuPd–1. This study demonstrates the production of multicarbon liquid fuels from CO2 over an artificial leaf and therefore brings us a step closer in using sunlight to generate value-added complex products.