Dye sensitized solar cell efficiency is a measure to characterize a DSSC. It is the ratio of the total electric power produced to a particular solar energy provided to the cell expressed as a percentage. In simpler words dye sensitized solar cell efficiency can be put down as the amount of electric power produced for a particular amount of solar light that is shining on the cell. The term dye sensitized solar cell efficiency helps us understanding the nanostructure of the dye sensitized solar cell. In the case of a dye sensitized solar the surface available for sunlight is large because of its nanostructure. Therefore there is every possibility that a photon will be absorbed by the dye and it is immediately converted into an electron.
The loss of energy is very little in the case of a dye sensitized solar cell and it is generally lost when the photon is transferred from the photo anode to the electrolyte. This loss is around 10% of the total photons excited and is relatively very less compared to other electrical energy generating systems.
The amount of electricity generated by a dye sensitized solar cell depends upon the number of photons absorbed and this largely depends on the absorption spectrum of the dye