Please use this identifier to cite or link to this item: https://ktisis.cut.ac.cy/handle/10488/9847
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dc.contributor.authorTsokkou, Demetra-
dc.contributor.authorItskos, Grigorios-
dc.contributor.authorChoulis, Stelios A.-
dc.contributor.authorYarema, Maksym-
dc.contributor.authorHeiss, Wolfgang-
dc.contributor.authorOthonos, Andreas-
dc.contributor.otherΧούλης, Στέλιος-
dc.date.accessioned2017-02-23T10:53:06Z-
dc.date.available2017-02-23T10:53:06Z-
dc.date.issued2013-06-14-
dc.identifier.citationNanotechnology, 2013, Volume 24, Issue 23, Article number 235707en_US
dc.identifier.issn09574484-
dc.identifier.urihttp://ktisis.cut.ac.cy/handle/10488/9847-
dc.description.abstractThe dynamics of photoexcitations in hybrid blends of poly(3-hexylthiophene) (P3HT) conjugated polymer donor and oleic-acid capped lead sulfide (PbS) quantum dot (QD) acceptors of different concentrations - for light harvesting applications - were investigated using time-resolved transmission and photoluminescence spectroscopies. Following excitation at 400 nm and probing in the 500-1000 nm region, we find that geminate excitation recombination in the blend of P3HT/PbS QDs dominates the transient decays at sub-ns times while intermaterial interactions such as charge transfer processes appear at longer times in the 1-50 ns regime. For the hybrid blend films with lower QD concentrations (<67% wt), polymer exciton recombination dominates the overall transient absorption signal. For higher QD contents, QD state relaxation effects become visible. Excitation density studies reveal the presence of linear exciton relaxation effects in the P3HT region while carrier decay for films with high PbS QD concentration is influenced by QD Auger recombination. Time-resolved luminescence shows that electron transfer from the P3HT/PbS QDs appears relatively inefficient in comparison to the geminate recombination, while hole transfer competes favorably to intrinsic QD recombination.en_US
dc.formatpdfen_US
dc.language.isoenen_US
dc.publisherIOP Publishing Ltd.en_US
dc.rights© 2013 IOP Publishing Ltd.en_US
dc.subjectHeterojunction solar-cellsen_US
dc.subjectColloidal pbS nanocrystalsen_US
dc.subjectOrganic photodiodesen_US
dc.subjectCharge-separationen_US
dc.subjectElectron-transferen_US
dc.subjectPolymeren_US
dc.subjectFullereneen_US
dc.subjectSpectroscopyen_US
dc.subjectP3HT/PCBMen_US
dc.titleConcentration and excitation effects on the exciton dynamics of poly(3-hexylthiophene)/PbS quantum dot blend filmsen_US
dc.typeArticleen_US
dc.doi10.1088/0957-4484/24/23/235707en_US
dc.collaborationUniversity of Cyprusen_US
dc.collaborationCyprus University of Technologyen_US
dc.collaborationUniversity of Linzen_US
dc.subject.categoryNano-Technologyen_US
dc.journalsSubscription Journalen_US
dc.countryCyprusen_US
dc.countryAustriaen_US
dc.subject.fieldEngineering and Technologyen_US
dc.publicationPeer Revieweden_US
item.grantfulltextnone-
item.fulltextNo Fulltext-
item.languageiso639-1other-
crisitem.author.deptDepartment of Mechanical Engineering and Materials Science and Engineering-
crisitem.author.facultyFaculty of Engineering and Technology-
crisitem.author.orcid0000-0002-7899-6296-
crisitem.author.parentorgFaculty of Engineering and Technology-
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