Graphene is composed of pure carbon. Capable of being produced in one layer,it is one of thinnest material and yet strong , and good conductor of electricity. Scientists dsicovered that by adding layers to the two-dimensional hetero-structure of graphene, its photonic potential can be improved greatly. Roof top panels could be augmented or replaced by this energy generating ultra thin coating.
Researchers found that sandwiching monolayers of light- absorbing transition metal dichalcogenides (TMDC) between two layers of super-conductive transparent graphene create a highly efficient cell. This could be a immense breakthrough in the solar industry which might make the devices multi-functional. The experiments have yielded positive results.Source: http://www.energymatters.com