[en] Sustained and efficient photovoltaic action depends on the electrolyte employed in the device like Quantum Dot Sensitized Solar cell (QDSSC). The study here focuses on the comparison of performance of different polysulphide electrolytes in CdS QDSSC by virtue of difference in their composition. Systematic electrochemical analyses were performed to study the effect of electrolyte composition on the overall solar cell performance by employing chronoamperometry, electrochemical impedance spectroscopy and electrical characterization of the fabricated solar cells. Of all the composition of electrolytes considered here, a modified polysulphide electrolyte with combination of ethanol, methanol and water has emerged as the best. (paper)