| Literature DB >> 31075027 |
Eugenio Cinquanta1,2, Daniele Meggiolaro3,4, Silvia G Motti5, Marina Gandini5, Marcelo J P Alcocer1,6, Quinten A Akkerman7,8, Caterina Vozzi2, Liberato Manna7, Filippo De Angelis3,4,9, Annamaria Petrozza5, Salvatore Stagira1,2.
Abstract
We study the nature of photoexcited charge carriers in CsPbBr_{3} 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.Entities:
Year: 2019 PMID： 31075027 DOI： 10.1103/PhysRevLett.122.166601
Source DB: PubMed Journal: Phys Rev Lett ISSN： 0031-9007 Impact factor: 9.161