Solid State DSC

The liquid electrolyte may be replaced with a solid molecular material, such as spiro-OMeTAD (2,2’,7,7’-tetrakis (N,N-dimethoxyphenylamine)-9,9’-spirobifluorene) or conducting polymers such as P3HT to make a solid state DSC.

The solid hole-conductor may have practical advantages compared to the liquid electrolyte based DSC. The highest energy conversion efficiency of solid state DSC (sDSC) currently is lower than that in liquid electrolyte DSCs, but it has recently been improved to over 7%. In the sDSC the mesoporous TiO2 layer is needed to be thinner in comparison with liquid electrolyte DSC, due to fast recombination and possibly due to problems of infiltrating the hole-conductor molecules in the mesoporous electrode. To increase the efficiency of the sDSC we develop new hole-conductor molecules and we try to identify the key limitations in the sDSC and how to improve the hole-conductor materials in combination with the dye-sensitized electrode.