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Tunable Circularly Polarized Luminescence via Chirality Induction and Energy Transfer from Organic Films to Semiconductor Nanocrystals

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cris.lastimport.scopus2024-02-12T19:55:10Z
dc.abstract.enCircularly polarized luminescent (CPL) films with high dissymmetry factors hold great potential for optoelectronic applications. Herein, we propose a strategy for achieving strongly dissymetric CPL in nanocomposite films based on chirality induction and energy transfer to semiconductor nanocrystals. First, focusing on a purely organic system, aggregation-induced emission (AIE) and CPL activity of organic liquid crystals (LCs) forming helical nanofilaments was detected, featuring green emission with high dissymmetry factors glum∼10-2. The handedness of helical filaments, and thus the sign of CPL, was controlled via minute amounts of a small chiral organic dopant. Second, nanocomposite films were fabricated by incorporating InP/ZnS semiconductor quantum dots (QDs) into the LC matrix, which induced the chiral assembly of QDs and endowed them with chiroptical properties. Due to the spectral matching of the components, energy transfer (ET) from LC to QDs was possible enabling a convenient way of tuning CPL wavelengths by varying the LC/QD ratio. As obtained, composite films exhibited absolute glumvalues up to ∼10-2and thermally on/off switchable luminescence. Overall, we demonstrate the induction of chiroptical properties by the assembly of nonchiral building QDs on the chiral organic template and energy transfer from organic films to QDs, representing a simple and versatile approach to tune the CPL activity of organic materials.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorLewandowski, Wiktor
dc.contributor.authorClever, Guido H.
dc.contributor.authorBals, Sara
dc.contributor.authorBagiński, Maciej
dc.contributor.authorOrtuño, Ana M.
dc.contributor.authorPedrazo-Tardajos, Adrián
dc.contributor.authorTessarolo, Jacopo
dc.contributor.authorParzyszek, Sylwia
dc.date.accessioned2024-01-26T11:07:36Z
dc.date.available2024-01-26T11:07:36Z
dc.date.copyright2022-11-07
dc.date.issued2022
dc.description.accesstimeAT_PUBLICATION
dc.description.financePublikacja bezkosztowa
dc.description.number11
dc.description.sdgZeroHunger
dc.description.versionFINAL_PUBLISHED
dc.description.volume16
dc.identifier.doi10.1021/ACSNANO.2C06623
dc.identifier.issn1936-0851
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/123876
dc.identifier.weblinkhttps://pubs.acs.org/doi/pdf/10.1021/acsnano.2c06623
dc.languageeng
dc.pbn.affiliationchemical sciences
dc.relation.ispartofACS Nano
dc.relation.pages18472-18482
dc.rightsCC-BY
dc.sciencecloudnosend
dc.subject.enaggregation-induced emission
dc.subject.enchirality amplification
dc.subject.enliquid crystals
dc.subject.ensemiconductor nanocrystals
dc.subject.ensupramolecular chirality
dc.titleTunable Circularly Polarized Luminescence via Chirality Induction and Energy Transfer from Organic Films to Semiconductor Nanocrystals
dc.typeJournalArticle
dspace.entity.typePublication