I don't see how to edit that post to include this url, so here's the link to another dye sensitized electron transfer system discussion aimed not at silver halides but other metallic oxides.

http://photochemistryportal.net/home...ar-cells-dssc/

My own work in carbon nanotubes on SiO2 substrates supports the theory we can tune structures to various colors and enhance efficiency of PV solar using dendritic structures having electrical lengths 1/2 or 1/4 of a wavelength (not accounting for loading by adjacent structures) of the target wavelength, the idea being to make blue sensitive PV work in the red or even IR someday.