Regensburg 2022 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

DS: Fachverband Dünne Schichten

DS 13: Thin Film Applications 2

DS 13.4: Vortrag

Mittwoch, 7. September 2022, 10:15–10:30, H14

Photoelectrochemical properties of CuBi2O4-based electrodes prepared via spin-coating for solar water splitting. — •Francesco Caddeo, Marco Krueger, Sophie Medicus, Carina Hedrich, Robert Zierold, and Dorota Koziej — University of Hamburg, Institute of Nanostructure and Solid State Physics Luruper Chaussee 149, D-22761 Hamburg, Germany

Photoelectrochemical (PEC) water splitting is one of the most promising technologies for the conversion of solar energy into hydrogen gas, which can be stored and used on demand as a fuel with net-zero CO2 emissions. Copper bismuth oxide (CuBi2O4) is recently emerging as a promising metal-oxide to be used as a light harvesting material in the photocathode of a PEC cell and is attracting increasing attention due to its well-suited bandgap of ca. 1.8 eV, its conduction band position of -0.7 V vs RHE (Reversible Hydrogen Electrode) and its highly anodic onset potential of ca. 0.8 V vs RHE, which makes it an ideal material to be implemented in a tandem device for unassisted solar water splitting. In our labs, we have developed a spin-coating procedure that allows us to fabricate highly uniform CuBi2O4 films with pure crystalline phase and various thicknesses on top of fluorine-doped tin oxide coated glass (FTO) used as a support. During my presentation, I will talk about recent results on the synthesis, characterization and photoelectrochemical properties of CuBi2O4 based photo-electrodes protected with a uniform coating of TiO2 overlayer deposited using Atomic Layer Deposition (ALD).