Barium Staminate as Semiconductor Working Electrodes for Dye-Sensitized Solar Cells

Dye-sensitized solar cells (DSSCs) are fabricated with perovskite-type BaSnO 3 as the photoelectrode materials. Different preparation methods including coprecipitation, hydrothermal, and solid state reaction are employed to synthesize BaSnO 3 particles to optimize the photoelectric activities of electrode materials. The photoelectric properties of BaSnO 3 particles and the performances of DSSCs are investigated by surface photovoltage spectroscopy and current-voltage measurements. The light-to-electricity conversion of 1.1% is preliminarily reached on the DSSC made of the coprecipitation-derived BaSnO 3 particles. Large current density of hole injection into the HOMO level of N719 dye from the valence band of BaSnO 3 and reduced photogenerated charge recombination in BaSnO 3 could be responsible for the observed solar cell performance of the DSSC fabricated from the coprecipitation-derived BaSnO 3 particles.