Panchromatic Solar-to-H2 Conversion by a Hybrid Quantum Dots-Dye Dual Absorber Tandem Device
Impacto
Scholar |
Otros documentos de la autoría: González Pedro, Victoria; Zarazúa, Isaac; Barea, Eva M; Fabregat-Santiago, Francisco; Rosa, Elder de la; Mora-Sero, Ivan; Gimenez, Sixto
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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/jp4109893 |
Metadatos
Título
Panchromatic Solar-to-H2 Conversion by a Hybrid Quantum Dots-Dye Dual Absorber Tandem DeviceAutoría
Fecha de publicación
2014-01Editor
American Chemical SocietyCita bibliográfica
GONZÁLEZ PEDRO, Victoria, et al. Panchromatic Solar-to-H2 Conversion by a Hybrid Quantum Dots–Dye Dual Absorber Tandem Device. The Journal of Physical Chemistry C, 2014, 118.2: 891-895.Tipo de documento
info:eu-repo/semantics/articleVersión de la editorial
http://pubs.acs.org/doi/abs/10.1021/jp4109893Versión
info:eu-repo/semantics/publishedVersionPalabras clave / Materias
Resumen
Solution-processed mesoscopic oxide semiconductor-based materials offer potentially low-cost and high stability alternative for next generation of water to hydrogen conversion photoelectrochemical cells (PEC). In the ... [+]
Solution-processed mesoscopic oxide semiconductor-based materials offer potentially low-cost and high stability alternative for next generation of water to hydrogen conversion photoelectrochemical cells (PEC). In the present study, we demonstrate the effective unassisted H2 generation by a tandem device based on a quantum dot (QD)-dye dual absorber system. These systems are constituted by a TiO2 mesoscopic photoanode sensitized with CdS QDs and a dye sensitized solar cell (DSSC), based on ruthenium dye, connected in series. This solar cell supplies the needed photovoltage to induce photodriven hydrogen production. Opto-electrochemical characterization of the single components allows the prediction of the operational photocurrents and a reliable estimation of the theoretical power conversion efficiencies of tandem systems. Evolved hydrogen under simulated solar illumination was collected, and solar to hydrogen conversion efficiencies (STH) were obtained. The tandem devices have demonstrated high stability in aqueous medium and solar-to-hydrogen conversion efficiency of (0.78 ± 0.04)%, near tripling the efficiency of single QD based photoanodes. These results highlight the importance of the design of hybrid photoanodes combining the effect of different light absorbers working in parallel tandem devices for the development of efficient H2 generation QD-based photoelectrochemical cells. © 2013 American Chemical Society. [-]
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The Journal of Physical Chemistry C, 2014, 118.2Derechos de acceso
Copyright © 2013 American Chemical Society
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