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Lévy defects in matrix-immobilized J aggregates : tracing intra-and intersegmental exciton relaxation
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dc.contributor.author | Lüer, Larry | |
dc.contributor.author | Rajendran, Sai Kiran | |
dc.contributor.author | Stoll, Tatjana | |
dc.contributor.author | Ganzer, Lucia | |
dc.contributor.author | Rehault, Julien | |
dc.contributor.author | Coles, David M. | |
dc.contributor.author | Lidzey, David | |
dc.contributor.author | Virgili, Tersilla | |
dc.contributor.author | Cerullo, Giulio | |
dc.date.accessioned | 2019-05-20T12:30:03Z | |
dc.date.available | 2019-05-20T12:30:03Z | |
dc.date.issued | 2017-02-02 | |
dc.identifier | 258563447 | |
dc.identifier | 9b62b5d1-e929-4ce1-a3cd-2dfd41a27bcb | |
dc.identifier | 85011343069 | |
dc.identifier | 000393443400001 | |
dc.identifier.citation | Lüer , L , Rajendran , S K , Stoll , T , Ganzer , L , Rehault , J , Coles , D M , Lidzey , D , Virgili , T & Cerullo , G 2017 , ' Lévy defects in matrix-immobilized J aggregates : tracing intra-and intersegmental exciton relaxation ' , Journal of Physical Chemistry Letters , vol. 8 , no. 3 , pp. 547-552 . https://doi.org/10.1021/acs.jpclett.6b02704 | en |
dc.identifier.issn | 1948-7185 | |
dc.identifier.other | ORCID: /0000-0002-9079-120X/work/100172736 | |
dc.identifier.uri | https://hdl.handle.net/10023/17731 | |
dc.description | L.L. thanks the EC for financial support by the cofunded Amarout program and the Spanish Ministry for economy and competitiveness (plan nacional, Project MultiCrom (CTQ2014-58801)). G.C. acknowledges financial support by the European Research Council (ERC-2011-AdG No. 291198). D.G.L. and D.C. thank the UK EPSRC for funding via research grant EP/M025330/1 “Hybrid Polaritonics” | en |
dc.description.abstract | One-dimensional J aggregates present narrow and intense absorption and emission spectra that are interesting for photonics applications. Matrix immobilization of the aggregates, as required for most device architectures, has recently been shown to induce a non-Gaussian (Lévy type) defect distribution with heavy tails, expected to influence exciton relaxation. Here we perform two-dimensional electronic spectroscopy (2DES) in one-dimensional J aggregates of the cyanine dye TDBC, immobilized in a gel matrix, and we quantitatively model 2DES maps by nonlinear optimization coupled to quantum mechanical calculations of the transient excitonic response. We find that immobilization causes strong non-Gaussian off-diagonal disorder, leading to a segmentation of the chains. Intersegmental exciton transfer is found to proceed on the picosecond time scale, causing a long-lasting excitation memory. These findings can be used to inform the design of optoelectronic devices based on J aggregates as they allow for control of exciton properties by disorder management. | |
dc.format.extent | 6 | |
dc.format.extent | 1686841 | |
dc.format.extent | 3302673 | |
dc.language.iso | eng | |
dc.relation.ispartof | Journal of Physical Chemistry Letters | en |
dc.subject | QC Physics | en |
dc.subject | Materials Science(all) | en |
dc.subject | NDAS | en |
dc.subject.lcc | QC | en |
dc.title | Lévy defects in matrix-immobilized J aggregates : tracing intra-and intersegmental exciton relaxation | en |
dc.type | Journal article | en |
dc.contributor.sponsor | EPSRC | en |
dc.contributor.institution | University of St Andrews. School of Physics and Astronomy | en |
dc.identifier.doi | 10.1021/acs.jpclett.6b02704 | |
dc.description.status | Peer reviewed | en |
dc.date.embargoedUntil | 2018-01-03 | |
dc.identifier.grantnumber | EP/M025330/1 | en |
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