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Platinum (Pt) is a conventional material for counter electrodes of dye-sensitized solar cells (DSSCs) due to its excellent electrocatalytic activity in the redox process. However, the high cost of Pt motivates researchers to search for composite materials of Pt to reduce its consumption. This study is aimed to reduce Pt usage by incorporating reduced graphene oxide (rGO) with Pt of different ratios in counter electrode thin films and to determine the optimum ratio with the highest efficiency. A DSSCbased platinum/rGO (Pt/rGO) counter electrode composite was fabricated using doctor-blade method. X-ray diffraction analysis was performed to examine the crystallite structure of the Pt/rGO thin film. The optimum ratio was found to be 70:30 of Pt:rGO, with current–voltage characterization showing an efficiency of 5.5%, open-circuit voltage of 0.739 V, current density of 12.5 mA/cm, and fill factor of 59.24%.

INCORPORATION OF GRAPHENE INTO COUNTER ELECTRODE TO ENHANCE THE PERFORMANCE OF DYE-SENSITIZED SOLAR CELLS