Microscopic Picture of Electron-Phonon Interaction in Two-Dimensional Halide Perovskites
Journal article, 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.


David Feldstein

Polytechnic University of Catalonia

Chalmers, Physics, Condensed Matter and Materials Theory

Raul Perea Causin

Chalmers, Physics, Condensed Matter and Materials Theory

Shuli Wang

Paul Sabatier University

Mateusz Dyksik

Paul Sabatier University

Wrocław University of Science and Technology

Kenji Watanabe

National Institute for Materials Science (NIMS)

Takashi Taniguchi

National Institute for Materials Science (NIMS)

Paulina Plochocka

Wrocław University of Science and Technology

Paul Sabatier University

Ermin Malic

Chalmers, Physics, Condensed Matter Theory

Journal of Physical Chemistry Letters

1948-7185 (eISSN)

Vol. 11 23 9975-9982

Subject Categories

Atom and Molecular Physics and Optics

Condensed Matter Physics





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