Injection and Recombination in Dye-Sensitized Solar Cells with a Broadband Absorbance Metal-Free Sensitizer Based on Oligothienylvinylene
Impacto
Scholar |
Otros documentos de la autoría: Caballero, Rubén; Barea, Eva M; Fabregat-Santiago, Francisco; De la Cruz, Pilar; Márquez, Lourdes; Langa, Fernando; Bisquert, Juan
Metadatos
Mostrar el registro completo del ítemcomunitat-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 |
Metadatos
Título
Injection and Recombination in Dye-Sensitized Solar Cells with a Broadband Absorbance Metal-Free Sensitizer Based on OligothienylvinyleneAutoría
Fecha de publicación
2008Editor
American Chemical SocietyISSN
1932-7447Cita bibliográfica
The Journal of Physical Chemistry C, 112, 47, p. 18623–18627Tipo de documento
info:eu-repo/semantics/articleVersión de la editorial
http://pubs.acs.org/doi/abs/10.1021/jp8061515Versión
info:eu-repo/semantics/publishedVersionPalabras clave / Materias
Resumen
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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