Photoinduced electron transfer in [Ru(II)∗–Co(III)]5+ on ITO leads to anodic current.
Energy transfer in [Ru(II)∗–Fe(II)]4+ is avoided in presence of electron acceptor.
[Ru(II)∗–Fe(II)]4+ on ITO leads to cathodic current in presence of electron acceptor.
Photocurrent magnitudes increase with the coverage value of the modified electrode.