Beyond Quantum Confinement: Excitonic Nonlocality in Halide Perovskite Nanoparticles with Mie Resonances

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dc.contributor.authorBerestennikov, A. S.
dc.contributor.authorLi, Y.
dc.contributor.authorIorsh, I. V.
dc.contributor.authorZakhidov, Anvar A.
dc.contributor.authorRogach, A. L.
dc.contributor.authorMakarov, S. V.
dc.contributor.utdAuthorZakhidov, Anvar A.
dc.date.accessioned2019-10-31T15:22:46Z
dc.date.available2019-10-31T15:22:46Z
dc.date.created2019-05-11
dc.descriptionFull text access from Treasures at UT Dallas is restricted to current UTD affiliates (use the provided Link to Article).
dc.description.abstractHalide perovskite nanoparticles have demonstrated pronounced quantum confinement properties for nanometer-scale sizes and strong Mie resonances for 10 2 nm sizes. Here we studied the intermediate sizes where the nonlocal response of the exciton affects the spectral properties of Mie modes. The mechanism of this effect is associated with the fact that excitons in nanoparticles have an additional kinetic energy that is proportional to k 2 , where k is the wavenumber. Therefore, they possess higher energy than in the case of static excitons. The obtained experimental and theoretical results for MAPbBr 3 nanoparticles of various sizes (2-200 nm) show that for particle radii comparable with the Bohr radius of the exciton (a few nanometers in perovskites), the blue-shift of the photoluminescence, scattering, and absorption cross-section peaks related to quantum confinement should be dominating due to the weakness of Mie resonances for such small sizes. On the other hand, for larger sizes (more than 50-100 nm), the influence of Mie modes increases, and the blue shift remains despite the fact that the effect of quantum confinement becomes much weaker. ©2019 The Royal Society of Chemistry.
dc.description.departmentSchool of Natural Sciences and Mathematics
dc.description.sponsorshipThis work was supported by the Ministry of Education and Science of the Russian Federation (Projects 14.Y26.31.0010 for simulations), Russian Science Foundation (17-73-20336 for particles characterization), and by the Research Grant Council of Hong Kong S.A.R. (GRF project CityU 11337616).
dc.identifier.bibliographicCitationBerestennikov, A. S., Y. Li, I. V. Iorsh, A. A. Zakhidov, et al. 2019. "Beyond quantum confinement: Excitonic nonlocality in halide perovskite nanoparticles with Mie resonances." Nanoscale 11(14): 6747-6754, doi: 10.1039/c8nr09837a
dc.identifier.issn2040-3364
dc.identifier.issue14
dc.identifier.urihttps://hdl.handle.net/10735.1/7066
dc.identifier.volume11
dc.language.isoen
dc.publisherRoyal Society of Chemistry
dc.relation.urihttps://dx.doi.org/10.1039/c8nr09837a
dc.rights©2019 The Royal Society of Chemistry
dc.source.journalNanoscale
dc.subjectExciton theory
dc.subjectStopping power (Nuclear physics)
dc.subjectDynamics
dc.subjectNanoparticles
dc.subjectPerovskite
dc.subjectResonance
dc.subjectAbsorption cross sections
dc.subjectHalides
dc.subjectNanoelectromechanical systems
dc.subjectNuclear size (Physics)
dc.titleBeyond Quantum Confinement: Excitonic Nonlocality in Halide Perovskite Nanoparticles with Mie Resonances
dc.type.genrearticle

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