Recent Progress in the Application of Polyoxometalates for Dye-sensitized/Organic Solar Cells

At present, high efficiency and low fabrication cost are still the main goal that people pursuit for next-generation solar cells such as dye-sensitized solar cells (DSSCs) and organic solar cells (OPVs). Polyoxometalates (POMs), as an environmentally friendly material, are a type of stable, low cost and soluble oxide clusters with desirable features, including highly tunable structural properties, peculiar optoelectronic properties and excellent redox properties. Thus, during the recent years, POMs have been increasingly recognized as important building blocks for DSSCs and OPVs. In this review, the development of various molecular and hybrid materials derived from POMs is discussed with regard to the function in solar cells.