Exciton Migration and Surface Trapping for a Photonic Crystal Displaying Charge-Recombination Fluorescence

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dc.contributor.authorAl-Aqar, Roza
dc.contributor.authorAtahan, Alparslan
dc.contributor.authorBenniston, Andrew C.
dc.contributor.authorPerks, Thomas
dc.contributor.authorWaddell, Paul G.
dc.contributor.authorHarriman, Anthony
dc.date.accessioned2020-05-01T12:14:13Z
dc.date.available2020-05-01T12:14:13Z
dc.date.issued2016
dc.departmentDÜ, Teknoloji Fakültesi, Polimer Mühendisliği Bölümüen_US
dc.descriptionWaddell, Paul/0000-0002-7851-7347; AL-AQAR, ROZA ABDULRAZAQ SALIH/0000-0001-9960-1313; Harriman, Anthony/0000-0003-0679-2232; Benniston, Andrew/0000-0001-8878-5014en_US
dc.descriptionWOS: 000384807600008en_US
dc.descriptionPubMed: 27597381en_US
dc.description.abstractA compact donor-acceptor molecular dyad has been synthesized by attaching an N,N-dimethylamino fragment to a naphthalic anhydride residue. The dyad shows fluorescence from an intramolecular charge-transfer state (i.e., charge-recombination fluorescence) in solution, with the photo-physical properties being strongly dependent on the solvent polarity. Similar emission is seen for single crystals of the target compound, the molecules being aligned head-to-head, although time-resolved emission profiles display dual-exponential kinetics. A second polymorph with the head-to-tail alignment also gives rise to two lifetimes that differ somewhat from those of the first structure, which are assigned to bulk and surface-bound molecules. Growing the crystal in the presence of Rhodamine B localizes the dye around the surface. Excitation of the crystal is followed by sub-ps exciton migration along the aligned stacks, with occasional crossing to adjacent stacks and trapping at the surface. Rhodamine B present at very low levels acts as the acceptor for excitons entering the surface layer. Crystals embedded in a polyester resin form an artificial light-harvesting antenna able to sensitize an amorphous silicon solar cell.en_US
dc.description.sponsorshipNewcastle University; TUBITAK (The Scientific and Technological Research Council of Turkey)Turkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK); Higher Committee for Education Development in Iraq (HCED)en_US
dc.description.sponsorshipWe thank Newcastle University for financial support of this work. A.A. gratefully acknowledges the award of a research scholarship from TUBITAK (The Scientific and Technological Research Council of Turkey) and R.A.A. is endebted to The Higher Committee for Education Development in Iraq (HCED) for the award of a postgraduate studentship.en_US
dc.identifier.doi10.1002/chem.201602155en_US
dc.identifier.endpage15429en_US
dc.identifier.issn0947-6539
dc.identifier.issn1521-3765
dc.identifier.issue43en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage15420en_US
dc.identifier.urihttps://doi.org/10.1002/chem.201602155
dc.identifier.urihttps://hdl.handle.net/20.500.12684/6348
dc.identifier.volume22en_US
dc.identifier.wosWOS:000384807600008en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakPubMeden_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherWiley-V C H Verlag Gmbhen_US
dc.relation.ispartofChemistry-A European Journalen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectelectronic energy transferen_US
dc.subjectfluorescenceen_US
dc.subjectlight harvestingen_US
dc.subjectphotophysicsen_US
dc.subjectpolymorphen_US
dc.titleExciton Migration and Surface Trapping for a Photonic Crystal Displaying Charge-Recombination Fluorescenceen_US
dc.typeArticleen_US

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