Exciton Fine Structure in 2D Perovskites: The Out‐of‐Plane Excitonic State
Name
Advanced Optical Materials - 2023 - Posmyk - Exciton Fine Structure in 2D Perovskites The Out‐of‐Plane Excitonic State.pdf
Description
Published version
Size
1.28 MB
Format
Adobe PDF
Checksum (MD5)
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Author(s)
Posmyk, Katarzyna
Dyksik, Mateusz
Surrente, Alessandro
Maude, Duncan K
Zawadzka, Natalia
Babiński, Adam
Molas, Maciej R
Paritmongkol, Watcharaphol
Mączka, Mirosław
Tisdale, William A
Date Issued
July 23, 2024
Journal
Advanced Optical Materials
Publisher
Wiley
Citation
Posmyk, Katarzyna, Dyksik, Mateusz, Surrente, Alessandro, Maude, Duncan K, Zawadzka, Natalia et al. 2024. "Exciton Fine Structure in 2D Perovskites: The Out‐of‐Plane Excitonic State." Advanced Optical Materials, 12 (8).
Version
Final published version
Abstract
2D Ruddlesden-Popper metal-halide perovskites feature particularly strong excitonic effects, making them a fascinating playground for studying exciton physics. A complete understanding of the properties of this quasi-particle is crucial to fully exploit the tremendous potential of 2D perovskites (2DP) in light emission applications. Despite intense investigations, some of the exciton properties remain elusive to date, for example, the energy-ordering of the exciton states within the so-called fine structure manifold. Using optical spectroscopy, it demonstrates that in the archetypical 2DP (PEA)2PbI4, in contradiction to theoretical predictions, the energy of the bright out-of-plane exciton state is higher than that of two in-plane states. Having elucidated the order of exciton fine structure, it determines the g-factor of the dark exciton transition, together with the values of the electron and hole g-factors in the direction parallel to the c-axis of the crystal. In this way, it provides for the first time, a complete picture of the exciton fine structure in (PEA)2PbI4 2DP.
MIT Department
Massachusetts Institute of Technology. Department of Chemical Engineering
Massachusetts Institute of Technology. Department of Chemistry
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DOI of Published Version
10.1002/adom.202300877
