Ultrafast THz Probe of Photoinduced Polarons in Lead-Halide Perovskites
(2019) In Physical Review Letters 122(16).- Abstract
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.
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- author
- organization
- publishing date
- 2019
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physical Review Letters
- volume
- 122
- issue
- 16
- article number
- 166601
- publisher
- American Physical Society
- external identifiers
-
- scopus:85065149531
- pmid:31075027
- ISSN
- 0031-9007
- DOI
- 10.1103/PhysRevLett.122.166601
- language
- English
- LU publication?
- yes
- id
- 48b11626-6eaf-4087-9f23-fe3f6f4bb696
- date added to LUP
- 2019-05-15 14:53:48
- date last changed
- 2024-04-16 04:51:43
@article{48b11626-6eaf-4087-9f23-fe3f6f4bb696, abstract = {{<p>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.</p>}}, author = {{Cinquanta, Eugenio and Meggiolaro, Daniele and Motti, Silvia G. and Gandini, Marina and Alcocer, Marcelo J.P. and Akkerman, Quinten A. and Vozzi, Caterina and Manna, Liberato and De Angelis, Filippo and Petrozza, Annamaria and Stagira, Salvatore}}, issn = {{0031-9007}}, language = {{eng}}, number = {{16}}, publisher = {{American Physical Society}}, series = {{Physical Review Letters}}, title = {{Ultrafast THz Probe of Photoinduced Polarons in Lead-Halide Perovskites}}, url = {{http://dx.doi.org/10.1103/PhysRevLett.122.166601}}, doi = {{10.1103/PhysRevLett.122.166601}}, volume = {{122}}, year = {{2019}}, }