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)
Vol. 11 23 9975-9982Ämneskategorier
Atom- och molekylfysik och optik
Den kondenserade materiens fysik
DOI
10.1021/acs.jpclett.0c02661
PubMed
33180499