Effects of 2-Amino-4,6-Dimethoxypyrimidine on PVDF/KI/I2-Based Solid Polymer Electrolytes for Dye-Sensitized Solar Cell Application

In this work, we have investigated the effects of 2-amino-4,6-dimethoxypyrimidine on polyvinylidene fluoride/potassium iodide/iodine (PVDF/KI/I 2 ) in dye-sensitized solar cells (DSSC). Different weight ratios (0%, 10%, 20%, 30%, 40% and 50%) of 2-amino-4,6-dimethoxypyrimidine-doped PVDF/KI/I 2 -based solid polymer electrolytes (SPEs) were prepared by solution-casting method. The prepared 2-amino-4,6-dimethoxypyrimidine-doped PVDF/KI/I 2 -based SPEs were characterized by powder x-ray diffraction (PXRD) analysis, AC impedance analysis and scanning electron microscopy (SEM) analysis. The crystallinity of 2-amino-4,6-dimethoxypyrimidine-doped PVDF/KI/I 2 -based SPEs was confirmed by PXRD measurement. The ionic conductivity of 2-amino-4,6-dimethoxypyrimidine-doped PVDF/KI/I 2 -based SPEs was calculated using AC impedance analysis. The ionic conductivity values of different weight ratios (0%, 10%, 20%, 30%, 40% and 50%) of 2-amino-4,6-dimethoxypyrimidine-doped PVDF/KI/I 2 -based SPEs are 5.50 × 10 −6 S cm −1 , 1.74 × 10 −5 S cm −1 , 4.91 × 10 −5 S cm −1 , 2.04 × 10 −5 S cm −1 , 1.58 × 10 −5 S cm −1 and 1.04 × 10 −5 S cm −1 , respectively. Ionic conductivity studies revealed that the 20% 2-amino-4,6-dimethoxypyrimidine-doped PVDF/KI/I 2 -based SPE showed the highest ionic conductivity value. The SEM images show the surface morphology of 2-amino-4,6-dimethoxypyrimidine-doped PVDF/KI/I 2 -based SPEs. The power conversion efficiency (PCE) of DSSCs utilizing different weight ratios (0%, 10%, 20%, 30%, 40% and 50%) of 2-amino-4,6-dimethoxypyrimidine-doped PVDF/KI/I 2 -based SPEs are 1.4%, 2.0%, 2.5%, 2.3%, 1.9% and 1.6%, respectively. These results revealed that the DSSC using 20% 2-amino-4,6-dimethoxypyrimidine-doped PVDF/KI/I 2 -based SPE exhibited the highest PCE.