Abstract
The search for cost-effective devices for solar energy conversion has driven considerable research efforts from chemists, physicists, and material scientists. In dye-sensitized solar cells (DSSCs), TiO2 is the most widely employed semiconductor due its availability and outstanding properties. Nevertheless, other metal oxides have been tested in DSSCs, aiming at a deeper understand of the role of morphological and electronic properties on the DSSC photoelectrochemical parameters as well as the possibility to produce composites able to boost the overall conversion efficiency. In this chapter, attention is given to the application of Nb2O5 thin films in DSSCs. Their preparation methods, morphologic, optical, and electronic properties are summarized and an overview of their application with DSSCs is provided. Despite a comprehensive review of the literature, the main aim of this work is to correlate the intrinsic properties of this interesting metal oxide with the photoelectrochemical behavior of DSSCs. Selected examples of application of Nb2O5 as mesoporous or blocking layers in DSSCs are discussed and the main challenges to production of more efficient devices are highlighted.
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