Efficient dye-sensitized solar cells with broad absorption and enhanced photo-current generation
- Efficient dye-sensitized solar cells with broad absorption and enhanced photo-current generation
- 김동영; 김지헌; 이호림; 서용석
- organic dye; DSSC; hierarchical structure; electro spray; TiO2
- Issue Date
- RSC advances
- VOL 6, NO 62-S6755
- Metal-free organic dyes comprising donor, electron-conducting, and acceptor moieties with anchoring groups were designed and synthesized for the sensitization of hierarchically structured TiO2 (HS-TiO2) nanoaggregates of TiO2 electrode. The performance of JH-2 in a dye sensitized solar cell (DSSC) was compared with the performances of JH-1 and PTD-02. The DSSC of JH-2 with the HS-TiO2 electrode yielded an unprecedented high photocurrent density of 21.62 mA cm(-2), an open circuit voltage of 691 mV and a fill factor of 0.631, and an overall efficiency of 9.42% under standard AM 1.5 sunlight. These were superior to those obtained from the JH-1 DSSC or the PTD-02 sensitizer, which has a chemical structure similar to JH-1, but displayed a much lower photocurrent density and efficiency. The performance of JH-2 DSSC developed here can offer an efficiency comparable to that of a popular ruthenium-coordinated dye (N719) while providing better long-term stability even without a UV filter.
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