Metal-centred states control carrier lifetimes in transition metal oxide photocatalysts

Efficient sunlight-to-fuel conversion requires materials that produce long-lived charges, but increasing carrier lifetimes in visible-light-active photocatalysts has proven difficult. Now it has been shown that rapid charge deactivation via metal-centred states prevents long lifetimes and limits photocatalytic performance. These insights bridge solid-state and molecular photochemistry, informing strategies for improved photocatalyst design.