Ultrafast THz Probe of Photoinduced Polarons in Lead-Halide Perovskites

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We study the nature of photoexcited charge carriers in CsPbBr3 nanocrystal thin films by ultrafast optical pump-THz probe spectroscopy. We observe a deviation from a pure Drude dispersion of the THz dielectric response that is ascribed to the polaronic nature of carriers; a transient blueshift of observed phonon frequencies is indicative of the coupling between photogenerated charges and stretching-bending modes of the deformed inorganic sublattice, as confirmed by DFT calculations.


  • Eugenio Cinquanta
  • Daniele Meggiolaro
  • Silvia G. Motti
  • Marina Gandini
  • Marcelo J.P. Alcocer
  • Quinten A. Akkerman
  • Caterina Vozzi
  • Liberato Manna
  • Filippo De Angelis
  • Annamaria Petrozza
  • Salvatore Stagira
Enheter & grupper
Externa organisationer
  • Polytechnic University of Milan
  • CNR Institute for Photonics and Nanotechnologies, Rome (IFN)
  • Italian Institute of Technology
  • University of Genoa
  • University of Perugia
  • Institute of Molecular Science and Technologies (ISTM-CNR)

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Den kondenserade materiens fysik
TidskriftPhysical Review Letters
Utgåva nummer16
StatusPublished - 2019
Peer review utfördJa