Application of Azo Dye as Sensitizer in Dye-Sensitized Solar Cells

In azo dye is used as photosensitizers in Dye-sensitized solar cells. Azo dyes are economically superior to organometallic dyes because they are color variation and cheap. The spectrophotometric evaluation of an azo dye in solution and on a TiO2 substrate shows that the dye forms J-aggregation on the nanostructured TiO2 substrate. Oxidation potential measurements for used azo dyes ensured an energetically permissible and thermodynamically favorable charge transfer throughout the continuous cycle of photo-electric conversion. The performance of dye-sensitized solar cells based on azo dyes has been studied. The results illustrate that the dye containing acetic acid and sulfonic acid as the acceptor group gave the maximum conversion efficiency of 3.52% and 3.17% in the presence and absence of anti-aggregation agent, respectively.