Abstract
For the dye-sensitized solar cells, there are several methods to improve the efficiency. (1) Increase the total interface area of the anode. (2) Decrease the electron loss in the anode. (3) Develop the dye that can absorb the light across visible and near-IR. (4) Increase the light path in the anode. in this thesis, first we investigate the effect of anode thickness on the solar cell efficiency. We found that the optimal anode thickness is about 15 μm, which has the highest current density 13.7 mA/cm2, and efficiency 6.14 %. We also investigated the effect of adding a backscattering layer, and found that 10 % doping of diameter 170 nm TiO2 nanoparticles has the highest efficiency 5.60 % as compared with standard anode (10 μm thichness), efficiency 5.19 %. For the uniform doping structure. 5 % doping has the highest current density and highest efficiency 5.89 %, as compared with standard anode (10 μm thichness), efficiency 4.60 %. This result is consistent with the simulation result by Jorg Ferber et al. For 10 % doping, it has only 4.71 % efficiency, which is lower than the prediction by simulation. For the multi-layer anode with two section structure, the highest efficiency 6.04 % occurs at 10 % doping in second section with 0 % doping of the first section. For three section structure, the optima doping is 0 %, 5 %, 10 %, respectively for the three sections. It has an efficiency 5.93 %, which is slightly better than the 0 %, 5%, 5 % case. It is concluded that at the optima doping conditions three section structure is slight by better than uniform doping case.