The Photovoltaic Performance of CdS/Cu2S (QD) Co-Sensitized Solar Cell

The performance of CdS/Cu 2 S co-sensitized quantum dot solar cell (QDSSCs) is studied. CdS quantum dots (QDs) were adsorbed onto TiO 2 using Successive Ionic Layer Adsorption and Reaction (SILAR) method for different cycles (2, 4, 6, 8 and 10). The Cu 2 S QDs were deposited onto TiO 2 /CdS10 cycle photoanodes using the same method. The FTO counter electrodes were coated with platinum, while the electrolyte containing polysulfide redox species was sandwiched between the two electrodes. The current density- voltage (J-V) characteristic curves of the assembled QDSSCs were measured at different cycles and AM 1.5 simulated sunlight. The value of current density (J sc ) and conversion efficiency (η) of TiO 2 /CdS/Cu 2 S are 252% larger than the TiO 2 /CdS values. The maximum values of J sc and η are 3.56 mA/cm 2 and 1.21% respectively corresponding to CdS10/Cu 2 S for 6 cycles of Cu 2 S.