Efficient dye-sensitized solar cells with broad absorption and enhanced photo-current generation

Authors
Kim, JihunLee, HorimKim, Dong YoungSeo, Yongsok
Issue Date
2016-06
Publisher
ROYAL SOC CHEMISTRY
Citation
RSC ADVANCES, v.6, no.62, pp.S6747 - S6755
Abstract
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.
Keywords
ORGANIC-DYES; SILYL-ANCHOR; TRIPHENYLAMINE; ELECTROLYTES; FABRICATION; STABILITY; ENERGY; organic dye; DSSC; hierarchical structure; electro spray; TiO2
ISSN
2046-2069
URI
https://pubs.kist.re.kr/handle/201004/124030
DOI
10.1039/c6ra06247d
Appears in Collections:
KIST Article > 2016
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