Research Article
Study of Light Harvesting Properties of Different Classes of Metal-Free Organic Dyes in TiO2 Based Dye-Sensitized Solar Cells
Table 1
Molecular formula, colour, solubility,
value, and structure of fluorone, triarylmethane, azo, and thiazine based metal-free organic dyes.
| Dyes | Colour | Formula (M. Wt.) | Solubility | (nm) | Structure |
| Fluorone based dyes | Phloxine B | Red | C20H2Br4Cl4Na2 (829.7) | Slightly in water and ethanol | 548 nm | | Ethyl eosin | Red | C22H11O5Br4Na (714) | Slightly in ethanol and water | 532 nm | | Eosinol | Red | C20H8Br4O5 (647.9) | Slightly in water and moderately in ethanol | 524 nm | | Erythrosin B | Maroon | C20H6O5I4Na2 (879.9) | Slightly in water and ethanol | 524 nm | |
| Triarylmethane based dyes | Victoria blue 4R | Blue | C34H34N3Cl (520.1) | Ethanol and slightly in water | 591 nm | | Methyl green | Green | C26H33N3Cl2 (458.5) | Soluble in ethanol | 630 nm, 420 nm | | Acid fuchsin | Red | C20H17N3Na2O9S3 (585.6) | Water, slightly in ethanol | 540–546 nm | | Chromoxane cyanin R | Yellow brown | C23H15O9SNa3 (536.4) | Readily soluble in water and ethanol | 518 nm | |
| Azo based dyes | Sudan III | Red | C22H16N4O (352.4) | Slightly in ethanol | 507 nm | | Orange G | Orange | C16H10N2O7S2Na2 (452.386) | Slightly in water and ethanol | 475 nm | | Azophloxine | Red | C18H13N3O8S2Na2 (509.44) | Soluble in water and slightly soluble in ethanol | 532, 506 nm | | Xylidine Ponceau | Red | C18H14N2O7S2Na2 (480.44) | Soluble in water and slightly soluble in ethanol | 503 nm | |
| Thiazine based dyes | Azure C | Blue | C13H12N3SCl (277.8) | Readily soluble in ethanol | 616 nm | | Azure B | Blue | C15H16N3SCl (305.8) | Readily soluble in ethanol | 648 nm | | Toluidine blue O | Blue | C15H16N3SCl (305.8) | Slightly in water and ethanol | 626 nm | |
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