Heterojunctions: Joining different semiconductors

Abstract

Coupling different semiconductors is one of the strategies that have been successfully followed in order to obtain more active photocatalysts. Here we will concentrate on materials composed of clearly distinct crystalline phases and, especially on the role of the interface between these different phases, which is the feature that characterizes this type of systems and provides improved photocatalytic (and other) properties. TiO2-based coupled systems are by far the most studied ones, and hence, they will be covered to a higher extent.