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dc.contributor.authorHinkel, Felix
dc.contributor.authorKim, Yoojin M.
dc.contributor.authorZagraniarsky, Yulian
dc.contributor.authorSchlütter, Florian
dc.contributor.authorAndrienko, Denis
dc.contributor.authorMüllen, Klaus
dc.contributor.authorLaquai, Frédéric
dc.date.accessioned2018-02-01T11:45:54Z
dc.date.available2018-02-01T11:45:54Z
dc.date.issued2018-01-26
dc.identifier.citationHinkel F, Kim YM, Zagraniarsky Y, Schlütter F, Andrienko D, et al. (2018) Efficiency-limiting processes in cyclopentadithiophene-bridged donor-acceptor-type dyes for solid-state dye-sensitized solar cells. The Journal of Chemical Physics 148: 044703. Available: http://dx.doi.org/10.1063/1.4999136.
dc.identifier.issn0021-9606
dc.identifier.issn1089-7690
dc.identifier.doi10.1063/1.4999136
dc.identifier.urihttp://hdl.handle.net/10754/627009
dc.description.abstractThe charge generation and recombination processes in three novel push-pull photosensitizers for dye-sensitized solar cells (DSSCs) are studied by ps–μs transient absorption (TA) and quasi-steady-state photoinduced absorption (PIA) spectroscopy. The three cyclopentadithiophene-based photosensitizer dye molecules exhibit comparably low power conversion efficiencies ranging from 0.8% to 1.7% in solid-state DSSCs. We find that the photocurrents increase in the presence of Li-salt additives. Both TA and PIA measurements observe long-lived dye cations created by electron injection from the dyes’ excited state for two dyes from the series. However, the third dye shows significantly lower performance as a consequence of the less efficient electron injection even after the addition of Li-salts and faster electron-hole recombination on the ns-μs time scale. In essence, the prerequisites for this class of donor-π bridge-acceptor photosensitizers to reach higher charge generation efficiencies are a combination of strong dipole moments and fine tuning of the electronic landscape at the titania-dye interface by Li-salt addition.
dc.description.sponsorshipF. Laquai thanks the Max Planck Society for funding the Max Planck Research Group.
dc.publisherAIP Publishing
dc.relation.urlhttp://aip.scitation.org/doi/10.1063/1.4999136
dc.rightsThis article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. The following article appeared in The Journal of Chemical Physics and may be found at http://doi.org/10.1063/1.4999136.
dc.subjectSolar cells
dc.subjectPhotochemistry
dc.subjectPhotoconductivity
dc.subjectChemical compounds
dc.subjectSpectroscopy
dc.titleEfficiency-limiting processes in cyclopentadithiophene-bridged donor-acceptor-type dyes for solid-state dye-sensitized solar cells
dc.typeArticle
dc.contributor.departmentKAUST Solar Center (KSC)
dc.contributor.departmentMaterial Science and Engineering Program
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalThe Journal of Chemical Physics
dc.eprint.versionPublisher's Version/PDF
dc.contributor.institutionMax-Planck-Institute for Polymer Research, Ackermannweg 10, D-55128 Mainz, Germany
kaust.personLaquai, Frederic
refterms.dateFOA2019-01-26T00:00:00Z
dc.date.published-online2018-01-26
dc.date.published-print2018-01-28


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