Co-sensitization of red and blue for dye-sensitized solar cells: A sequential approach

Combination of organic donor–linker–acceptor dyes for panchromatic enhancement in photoelectrodes of dye-sensitized solar cells enables their environmentally friendly and cost-effective design. A promising combination in terms of spectral broadening and miscibility are the dyenamo red and blue dyes, which differ only in their molecular structure via linkers. In this work, we investigate the sequential co-sensitization of both dyes together with the co-adsorption of aggregation inhibitor, chenodeoxycholic acid to increase the optical absorption and energy conversion efficiency. Finally, with a J_SC of 10.2 mA cm⁻² and a V_OC of 584 mV, a small increase was achieved.

Graphical abstract

Combining Dyenamo Red and Blue dyes with chenodeoxycholic acid in dye-sensitized solar cells enhances optical absorption and energy efficiency. These combination enable cost-effective, environmentally friendly designs by broadening the spectral range and improving miscibility through sequential co-sensitization and co-adsorption techniques.