Unsymmetrical Heptamethine Dyes for NIR Dye-Sensitized Solar Cells

الملخص EN

Seven unsymmetrical heptamethine dyes with carboxylic acid functionality were synthesized and characterized.

These near-infrared dyes exhibit outstanding photophysical properties depending on their heterocyclic moieties and molecular structure.

As proof of principle, the dyes were used as photosensitizers in dye-sensitized solar cells.

Using the most promising dye, an overall conversion efficiency of 1.22% and an almost colorless solar cell were achieved.