Microscopic Picture of Electron-Phonon Interaction in Two-Dimensional Halide Perovskites
Artikel i vetenskaplig tidskrift, 2020

Perovskites have attracted much attention due to their remarkable optical properties. While it is well established that excitons dominate their optical response, the impact of higher excitonic states and formation of phonon sidebands in optical spectra still need to be better understood. Here, we perform a theoretical study of excitonic properties of monolayered hybrid organic perovskites - supported by temperature-dependent photoluminescence measurements. Solving the Wannier equation, we obtain microscopic access to the Rydberg-like series of excitonic states including their wave functions and binding energies. Exploiting the generalized Elliot formula, we calculate the photoluminescence spectra demonstrating a pronounced contribution of a phonon sideband for temperatures up to 50 K, in agreement with experimental measurements. Finally, we predict temperature-dependent line widths of the three energetically lowest excitonic transitions and identify the underlying phonon-driven scattering processes.

Författare

David Feldstein

Universitat Politecnica de Catalunya

Chalmers, Fysik, Kondenserad materie- och materialteori

Raul Perea Causin

Chalmers, Fysik, Kondenserad materie- och materialteori

Shuli Wang

Universite Paul Sabatier Toulouse III

Mateusz Dyksik

Universite Paul Sabatier Toulouse III

Politechnika Wrocławska

Kenji Watanabe

National Institute for Materials Science (NIMS)

Takashi Taniguchi

National Institute for Materials Science (NIMS)

Paulina Plochocka

Politechnika Wrocławska

Universite Paul Sabatier Toulouse III

Ermin Malic

Chalmers, Fysik, Kondenserade materiens teori

Journal of Physical Chemistry Letters

1948-7185 (eISSN)

9975-9982

Ämneskategorier

Atom- och molekylfysik och optik

Den kondenserade materiens fysik

DOI

10.1021/acs.jpclett.0c02661

PubMed

33180499

Mer information

Senast uppdaterat

2020-12-21