SnS quantum dot solar cells with Cu2S as counter electrode

Different size SnS quantum dots are prepared by chemical bath deposition. size of the particles are varied from 2.4 to 14.4 nm by varying the deposition time from 30 to 120 min. solar cells are fabricated with these quantum dots. Cu₂S coated FTO is used as counter electrode instead of the conventional platinum electrode and Na₂S as electrolyte. Cu₂S acts as a good catalyst for the polysulfide electrolyte. on comparing with a cell having platinum counter electrode and iodine based electrolyte, Cu₂S -polysulfide combination found to improve both the short circuit current and fill factor of the solar cell.