Novel organic dyes containing bis-dimethylfluorenyl amino benzo[b]thiophene for highly efficient dye-sensitized solar cell

Novel organic dyes, JK-16 and JK-17 containing bis-dimethylfluorenyl amino benzo[b]thiophene are designed and synthesized. Under standard global AM 1.5 solar condition, the JK-16 sensitized cell gave a short circuit photocurrent density (Jsc) of 15.33 mA cm−2, open circuit voltage (Voc) of 0.74 V, and a fill factor of 0.66, corresponding to an overall conversion efficiency η of 7.43%, and the JK-17 sensitized cell gave a Jsc of 12.66 mA cm−2, Voc of 0.67 V, and a fill factor of 0.65, corresponding to an overall conversion efficiency η of 5.49%.