To enhance its autiority, TiO2 scing layers are immersed in a mixture of philosensitive molicular sensitizer Cy a solvent. Due to highly porous structure by large surface area of electrode are high no. of dye molecules get attached on nanocryptalline TiO2 surface cy thus light absorption at sc suitace increases Photosensitizer or Dye Dyes resp. for max absorption of light should have foll photophysically electrochem. props: absorption spectra must cover UV-viscy NIR region dyes shud be luminescent periphery of dye shud be hydrophobic trenhance cr-absorbents like chemideoxy cholic acid (CDCA) long-tirm stability of alls or anchoring groups like alkoxy-silyl, phosphonic add by -COOH several be present to avoid aggregation of dye over TiO2 surface. Electrolyte I/I3, Br/B, SON/SCN2, (6II) /Co(III) has 5 main components u nedox couple, solvent additives ionic liquids 4 cations.
Foll propram shud be present in electrolyte : Redox couple shud be able to regenerate oxidized shud have chemical, thermal Cy electrochem stability dye efficiently. shud be non- corrosive with DSSC comp ovents shud he able of permit fast diffusion of charge carriers, enhance conductivity, Cy create effective contact between working by counter electrodes Counter Electrodes CE in DSSCs mostly prepared using pt, C, Cos, Aul GNP, alloy CES like Fese, CONio.25