Solar water splitting promises a practical solution to challenges associated with large scale solar energy harvesting and storage. Due to the stringent requirements for the materials’ properties, however, research on solar water splitting has been progressing at a frustratingly slow pace. In this talk, we will examine the detailed considerations on how to best build an efficient photoelectrode of reasonable cost. We will first look at the thermodynamic requirements, and then discuss how these requirements can be met. We will also examine the unique roles played by co-catalysts and how the photoelectrodes may be influenced by the introduction of co-catalyst. At the end, we will provide our perspectives on the future of this important field.

© 2017 Optical Society of America

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