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  • Thompson, J. J.P.Philipps-Universität Marburg,Philipps University Marburg,University Of Cambridge (author)

Phonon-Bottleneck Enhanced Exciton Emission in 2D Perovskites

  • Article/chapterEnglish2024

Publisher, publication year, extent ...

  • 2024
  • electronicrdacarrier

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  • LIBRIS-ID:oai:research.chalmers.se:b19f109d-1842-4892-94a6-5137358f535a
  • https://doi.org/10.1002/aenm.202304343DOI
  • https://research.chalmers.se/publication/540490URI

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  • Language:English
  • Summary in:English

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  • Subject category:art swepub-publicationtype
  • Subject category:ref swepub-contenttype

Notes

  • Layered halide perovskites exhibit remarkable optoelectronic properties and technological promise, driven by strongly bound excitons. The interplay of spin-orbit and exchange coupling creates a rich excitonic landscape, determining their optical signatures and exciton dynamics. Despite the dark excitonic ground state, surprisingly efficient emission from higher-energy bright states has puzzled the scientific community, sparking debates on relaxation mechanisms. Combining low-temperature magneto-optical measurements with sophisticated many-particle theory, the origin of the bright exciton emission in perovskites is elucidated by tracking the thermalization of dark and bright excitons under a magnetic field. The unexpectedly high emission is clearly attributed to a pronounced phonon-bottleneck effect, considerably slowing down the relaxation toward the energetically lowest dark states. It is demonstrated that this bottleneck can be tuned by manipulating the bright-dark energy splitting and optical phonon energies, offering valuable insights and strategies for controlling exciton emission in layered perovskite materials that is crucial for optoelectronics applications.

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  • Dyksik, MateuszPolitechnika Wrocławska,Wrocław University of Science and Technology (author)
  • Peksa, PaulinaPolitechnika Wrocławska,Wrocław University of Science and Technology (author)
  • Posmyk, KatarzynaPolitechnika Wrocławska,Wrocław University of Science and Technology (author)
  • Joki, Ambjörn,1997Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)amborn (author)
  • Perea Causin, Raul,1995Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)causin (author)
  • Erhart, Paul,1978Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)erhart (author)
  • Baranowski, MPolitechnika Wrocławska,Wrocław University of Science and Technology (author)
  • Loi, M. A.Rijksuniversiteit Groningen,University of Groningen (author)
  • Plochocka, PaulinaPolitechnika Wrocławska,Wrocław University of Science and Technology (author)
  • Malic, Ermin,1980Philipps-Universität Marburg,Philipps University Marburg(Swepub:cth)ermin (author)
  • Philipps-Universität MarburgUniversity Of Cambridge (creator_code:org_t)

Related titles

  • In:Advanced Energy Materials14:201614-68401614-6832

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