Efficient dye-sensitized photocathodes offer new opportunities for converting sunlight into storable energy cheaply and sustainably. We are developing photocathodes based on dye-sensitized metal oxides for light-driven reduction of carbon dioxide or water to higher energy products (solar fuels) using the lessons we have learnt from solar cells. Despite the infancy and complexity of this research area, we have brought about a number of exciting developments which have improved our understanding of the system. We are tackling the main limitations to photocurrent, by improving the quality of the mesoporous electrodes and engineering new photocatalysts specifically for the p-type system, to increase the quantum efficiency of the device. The electron-transfer dynamics are key to the performance and a major challenge is slowing down charge recombination between the photoreduced dye and the oxidised NiO so that chemistry can take place. Highlights from recent work examining charge-transfer at the interface between metal oxides and new supramolecular photocatalysts using transient absorption spectroscopy and time-resolved infrared spectroscopy will be presented alongside the photoelectrochemical characteristics of the devices. Dye-sensitized photocathodes for H₂ evolution, E. A. Gibson, Chemical Society Reviews, 2017, 46, 6194 – 6209. Photoelectrocatalytic H₂ Evolution from Integrated Photocatalysts Adsorbed on NiO, N. Põldme, L. O’Reilly, I. Fletcher, I. Sazanovich, M. Towrie, C. Long, J. G. Vos, M. T. Pryce, E. A. Gibson Chem. Sci., 2019,10, 99-112. Rapid photoinduced charge injection into covalent polyoxometalate-bodipy conjugates. F. A. Black, A. Jacquart, G. Toupalas, S. Alves, A. Proust, I. P. Clark, E. A. Gibson*, G. Izzet. Chem. Sci., 2018, 9, 5578-5584