Bright Excitonic Fine Structure in Metal-Halide Perovskites: From Two-Dimensional to Bulk
Name
bright-excitonic-fine-structure-in-metal-halide-perovskites-from-two-dimensional-to-bulk.pdf
Description
Published version
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2.77 MB
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8a08895cfd7cca48b4fe405340521257
Author(s)
Posmyk, Katarzyna
Zawadzka, Natalia
Łucja Kipczak
Dyksik, Mateusz
Surrente, Alessandro
Maude, Duncan K
Kazimierczuk, Tomasz
Babiński, Adam
Molas, Maciej R
Bumrungsan, Wakul
Date Issued
February 7, 2024
Journal
Journal of the American Chemical Society
Publisher
American Chemical Society
Citation
Bright Excitonic Fine Structure in Metal-Halide Perovskites: From Two-Dimensional to Bulk. Katarzyna Posmyk, Natalia Zawadzka,, Mateusz Dyksik, Alessandro Surrente, Duncan K. Maude, Tomasz Kazimierczuk, Adam Babiński, Maciej R. Molas, Wakul Bumrungsan, Chanisara Chooseng, Watcharaphol Paritmongkol, William A. Tisdale, Michał Baranowski, and Paulina Plochocka. Journal of the American Chemical Society 2024 146 (7), 4687-4694.
Version
Final published version
Abstract
The optical response of two-dimensional (2D) perovskites, often referred to as natural quantum wells, is primarily governed by excitons, whose properties can be readily tuned by adjusting the perovskite layer thickness. We have investigated the exciton fine structure splitting in the archetypal 2D perovskite (PEA)2(MA)n−1PbnI3n+1 with varying numbers of inorganic octahedral layers n = 1, 2, 3, and 4. We demonstrate that the in-plane excitonic states exhibit splitting and orthogonally oriented dipoles for all confinement regimes. The evolution of the exciton states in an external magnetic field provides further insights into the g-factors and diamagnetic coefficients. With increasing n, we observe a gradual evolution of the excitonic parameters characteristic of a 2D to three-dimensional transition. Our results provide valuable information concerning the evolution of the optoelectronic properties of 2D perovskites with the changing confinement strength.
MIT Department
Massachusetts Institute of Technology. Department of Chemistry
Massachusetts Institute of Technology. Department of Chemical Engineering
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DOI of Published Version
10.1021/jacs.3c11957
