Theoretical upper limit of short-circuit current density of TiO2 nanorod based dye-sensitized solar cell

Modeling and simulation of TiO2 nanorod based DSSC are done to explore the effect of nanorod diameter on the short-circuit current density. The results show that the porosity decreases with increasing diameter of nanorod for a fixed value of inter-rod separation. The short-circuit current density can be improved by optimizing the nanorod diameter. From this study it could be observed that the nanorods of diameter from 65 nm to 90 nm with a porosity range from 0.43 to 0.66 would result in better performing DSSC. The peak value of current density of 23.96 mA/cm2 is obtained for the working electrode with a nanorod diameter of 81 nm of length 12 μm for N719 dye.