Dye-sensitized solar cells are at present based on a nanostructured interpenetrating network of dye and semiconductor, which overcomes the prerequisite of a long exciton diffusion length; however, this also hampers charge-carrier transport. This work demonstrates that efficient light-induced charge separation is not necessarily only obtained in the case of a nanostructured network, but can also be achieved in a bilayer configuration (see figure).
Huijser, A., Savenije, T. J., Kotlewski, A., Picken, S. J., & Siebbeles, L. D. A. (2006). Efficient light-harvesting layers of homeotropically aligned porphyrin derivatives. Advanced materials, 18(17), 2234-2239. https://doi.org/10.1002/adma.200600045