| 초록 |
Over the last decade, dye-sensitized solar cell (DSSC) based on Ru-Complexes have been attracted much attention due to the high solar-to-electricity conversion efficiency up to 12% as well as low cost compared with p-n junction photovoltaic devices. Recently, organic dye molecules benefit from lower fabrication costs and higher molar extinction coefficients than Ru-dyes but generally produce less efficient solar cells. According to our recent report, it was observed that the electron lifetimes (τ) for the DSSCs with organic dyes were shorter than with a Ru dye. And we found that the long alkyl chain not only increases open-circuit voltage, but also decreases the electron recombination rate. In this work, organic photosensitizing dyes containing a phenothiazine framework with different alkyl chain length in the chromophore were synthesized to investigate the correlation between the alkyl chain length and photovoltaic properties as photosensitizers for DSSC. |
