Evaluation of most efficient redox couple based on compatibility of donor–acceptor in photogalvanic cell for simultaneous solar power conversion and storage

•To evaluate the most efficient redox (dye-reductant combination) couple based on compatibility of electron donor (reductant) and acceptor (dye) species for the PG cell.•The photogalvanic study for four (BCB-fructose, BCB-AA, MB-fructose and MB-AA) redox systems has been done, simultaneously. The order for redox couple based on electrical output is: MB-AA > MB-fructose > BCB-AA > BCB-fructose.•The electrical output is high when MB is used as a photosensitizer with both fructose and AA. It may be because of the larger λmax and the low molecular weight of MB than BCB.•The literature photogalvanic data for the different dye-AA systems clearly indicate that the electrical output has a lower than MB-AA redox couple of present study.•Thus, for the PG cell, the MB-AA redox couple has highest compatibility for electron acceptor and donor out of four redox systems.