A solid advancement for dye-sensitized solar cells.

: Switching to solids: Solid-state dye-sensitized solar cells are achieving efficiencies similar to those of their counterparts with liquid electrolytes. The new p-type semiconductor CsSnI(3) was found to be an excellent replacement for the traditional I(-)/I(3)(-) redox system. The picture shows a cross section of a dye-sensitized solar cell based on CsSnI(3).