Ozone Modification of Nanoscale Structured Titanium Dioxide Films for Dye-Sensitized Solar Cells

The kinetics of the reaction of ozone with titanium dioxide is studied. The structure and optical characteristics of nanostructured thin layers of titanium dioxide (TiO2) treated with an ozone-oxygen mixture with various ozone concentrations were studied by optical and infrared spectroscopy. It was shown that ozone treatment increases the adsorption of ruthenium dye (N719) in the bulk of the TiO2 layer nano-structured. Ozone-treated TiO2 layers were used as photoelectrodes for the design of sensitized solar cells (SCs). A study of the photovoltaic parameters of sensitized SCs under standard illumination (spectrum AM1.5G, illumination level 1000 W/m2) shows that modification of TiO2 with ozone leads to an increase in the solar power conversion efficiency from 7.5 to 8.2%.