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Effect of Oxygen on Sputtered Tantalum Nitride Thin Films for Photoelectrochemical Water Splitting

With the rising pressure of climate change pushing research into various areas of renewable energy sources, solar generated hydrogen represents a compelling research avenue. Using solar hydrogen farms, it would be possible to generate enough hydrogen from water and sunlight to support a theoretical hydrogen economy[1]. Since the discovery of photocatalytic water splitting using TiO2[2], four decades of research has focused on developing efficient solar to hydrogen water splitting technologies. However, despite large improvements in the capabilities of TiO2, efficient water splitting devices utilising it and other oxides have not eventuated.