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dc.contributor.authorBisquert, Juan
dc.contributor.authorMora-Sero, Ivan
dc.contributor.authorGimenez, Sixto
dc.contributor.authorRogach, A. L.
dc.contributor.authorLutich, Andrey A.
dc.contributor.authorGross, Dieter
dc.contributor.authorPoeschl, Andreas
dc.contributor.authorSusha, A. S.
dc.contributor.authorLana-Villarreal, Teresa
dc.description.abstractHybrid structures of colloidal quantum dots (QDs) with Ru-dyes have been studied as candidates for panchromatic sensitizers for TiO2-based solar cells. Steady-state and time resolved photoluminescence spectroscopy and photocurrent measurements have been employed to identify the prevailing transfer mechanisms for photogenerated excitons between CdSe QDs capped with a traditional bulky organic ligand trioctylphosphine and Ru-dyes (N3 or Ru505) deposited onto inert glass or mesoporous TiO2 substrates. The type II energy level alignment between the QDs and both N3 and Ru505 offers a possibility for the directional charge separation, with electrons transferred to the QDs and holes to the dye. This scenario is indeed valid for the QD/Ru505 and TiO2/QD/Ru505 hybrid systems, with the negligible spectral overlap between the emission of the QDs and the absorption of the Ru505 dye. For the QD/N3 and TiO2/QD/N3 hybrid systems, the spectral overlap favors the longer range energy transfer from the QDs to N3, independently of the presence of the electron acceptor TiO2.ca_CA
dc.format.extent7 p.ca_CA
dc.publisher© 2011 American Institute of Physicsca_CA
dc.relation.isPartOfJournal of Applied Physics (July 2011), vol. 110, no. 1ca_CA
dc.subjectcadmium compoundsca_CA
dc.subjectII-VI semiconductorsca_CA
dc.subjectsemiconductor materialsca_CA
dc.titleEnergy transfer versus charge separation in hybrid systems of semiconductor quantum dots and Ru-dyes as potential co-sensitizers of TiO2-based solar cells.ca_CA

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