Publication date: 15th December 2014
Cuprous oxide is a promising abundant material for solar water splitting. It is scalable and has a number of facile synthesis routes. Despite the many advantages of cuprous oxide it is known that the effective charge collection distance and the stability in aqueous solution are preventing its application in photoelectrochemical devices. In this presentation, we will show recent progress in the alloying of third elements into cuprous oxide that are beneficial for the electrochemical stability and preserve the favorable electronic structure. This alloying is performed as a wedge-type composition spread thin film materials library that spans a large fraction of the Cu-Si-Ti-O ternary metal-oxide system. In-depth analysis is performed by EDX, XRD, absorbtivity, resistivity, and photoelectrochemistry. Up until now there is no combinatorial study on the alloying of third elements in thin film cuprous oxide. To establish a protocol on analyzing the large datasets generated by these combinatorial methods in a rapid manner we present a tool for visualizing the six dimensional space containing composition, crystal structure, and elecrochemical data in two dimensional plots that are of great use when analysing large and complex datasets in the discovery of novel photoelectrochemical materials.
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