Abstract
We fabricated ZnO nano rod substrate of DSSC which was grown on FTO glass. The nano rod has the diameter of 60nm and length of 7μm. Then we coated MgO thin film covering ZnO nano rod. We have improved Voc and conversion efficiency by MgO coating. Namely, Voc was 627mV and efficiency was 0.125% for ZnO nano rod substrate. Voc was 660mV and efficiency was 0.130% after MgO coating.