Injection and Recombination in Dye-Sensitized Solar Cells with a Broadband Absorbance Metal-Free Sensitizer Based on Oligothienylvinylene
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Other documents of the author: Caballero, Rubén; Barea, Eva M; Fabregat-Santiago, Francisco; De la Cruz, Pilar; Márquez, Lourdes; Langa, Fernando; Bisquert, Juan
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Show full item recordcomunitat-uji-handle:10234/9
comunitat-uji-handle2:10234/2507
comunitat-uji-handle3:10234/6973
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http://dx.doi.org/10.1021/jp8061515 |
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Title
Injection and Recombination in Dye-Sensitized Solar Cells with a Broadband Absorbance Metal-Free Sensitizer Based on OligothienylvinyleneAuthor (s)
Date
2008Publisher
American Chemical SocietyISSN
1932-7447Bibliographic citation
The Journal of Physical Chemistry C, 112, 47, p. 18623–18627Type
info:eu-repo/semantics/articlePublisher version
http://pubs.acs.org/doi/abs/10.1021/jp8061515Version
info:eu-repo/semantics/publishedVersionAbstract
A new metal-free sensitizer for improved light harvesting with dye-sensitized solar cells (DSC) has been synthesized and fully characterized. The molecular sensitizer was engineered by linking the tiophenes groups by ... [+]
A new metal-free sensitizer for improved light harvesting with dye-sensitized solar cells (DSC) has been synthesized and fully characterized. The molecular sensitizer was engineered by linking the tiophenes groups by methine units, improving light absorption until 760 nm wavelength. In conventional DSC configuration the dye produces short-circuit current density of 13.4 mA/cm2 at 1.5 AM illumination (100 mW cm−2) and the incident photon-to-current conversion efficiency (IPCE) of 58%. The causes for the limitation to the photocurrent are investigated by impedance spectroscopy measurements, and it is shown that metal-based and metal-free molecular sensitizers show distinct characteristics concerning the blocking of the TiO2 surface with coadsorbents to prevent electron recombination. [-]
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Copyright © 2008 American Chemical Society
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