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 (J(sc)) of 15.33 mA cm(-2), open circuit voltage (V-oc) of 0.74 V, and a fill factor of 0.66, corresponding to an overall conversion efficiency eta of 7.43%, and the JK-17 sensitized cell gave a J(sc) of 12.66 mA cm(-2), V-oc of 0.67 V, and a fill factor of 0.65, corresponding to an overall conversion efficiency eta of 5.49%. (c) 2007 Elsevier Ltd. All rights reserved.