| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 25961 | Journal of Photochemistry and Photobiology A: Chemistry | 2016 | 8 Pages |
•Four N-fluorenyl indoline sensitizers were synthesized.•The optimal DSSC shows an efficiency of 5.89%.•The incorporation of aryl ring in the π-bridge favors the improvement of JSC.
Four N-fluorenyl indoline sensitizers were designed and synthesized to compare the influence of vinyl bond and aryl ring on the cell efficiency based on the cyanoacrylic acid acceptor. Compared with vinyl bond, the introduction of aryl ring enlarges the conjugation system of the whole molecule and brings out the improvement of the absorption spectra favoring the improvement of JSC. Among three kinds of aryl rings, benzene unit favors the photovoltage due to a reduction of electron recombination while the photocurrent more benefit from thiophene unit. Due to the best JSC, dye with thiophene π-bridge shows the most efficient photoelectricity conversion efficiency and has the maximum η value of 5.89% (VOC = 650 mV, JSC = 13.88 mA cm−2, ff = 0.71) under simulated AM 1.5 G irradiation (100 mW cm−2).
