Introducing an anatase TiO2 passivation layer enhances carrier transport and suppresses recombination in BiVO4. Coupling the optimized photoanode with a Ta3N5 back photoanode broadens light absorption, and subsequently integrating a Si solar cell enables unassisted PEC water splitting with a 3.1% STH efficiency.
K. Deng, J. Cui, C. Wu, Z. Han, L. Liu and J. Ye, Chem. Commun., 2026, Accepted Manuscript , DOI: 10.1039/D5CC07054F
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