SrTiO_3 modified TiO_2 electrodes and improved dye-sensitized TiO_2 solar cells

摘要

The SrTiO_3-coated TiO_2 (TiO_2/SrTiO_3) electrodes prepared by radio frequency magnetron sputtering are used to improve the performance of dye-sensitized T1O_2 solar cells by means of surface modification. The structural and performance characterizations reveal that the TiO_2/SrTiO_3 electrodes, in comparison with fresh TiO_2 electrodes, have low density of oxygen vacancies, passivated surface states, and suppressed interfacial recombination effect, thus resulting in improved performance parameters of the cells. An optimized coating of SrTiO_3 layer on the TiO_2 film surface allows an enhancement of the power conversion efficiency from 4.78% to 5.91%.