Magneto-optical study on the excitonic spectrum of (C6H13NH3)2PbI4

Kataoka, Takeshi; Kondo, Takashi; Ito, Ryoichi; Sasaki, Satoshi; Uchida, K.; Miura, N.

doi:10.1016/0921-4526(93)90336-5

Cited by 63 publications

(113 citation statements)

References 10 publications

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“…As is shown by the solid blue and red line, the shifts of bright in-plane state can be well described with the X-Y splitting of 2.1 meV and g B = 1.2 ± 0.1 taken after high field investigations. 21 , 26 The PL peak ascribed to the dark state exhibits a slight red-shift with increasing magnetic field, as expected for the lowest lying dark state, 53 , 54 corroborating our assignment. Unfortunately, even with the use of a high NA objective, we do not observe a clear feature related to the Z state, in either PL or reflectance spectra.…”

supporting

confidence: 89%

“…In the Faraday configuration the magnetic field induced shifts of two pairs of coupled states (| X ⟩, | Y ⟩ and | Z ⟩, | D ⟩) were described by the following formula: 53 , 54 where B is the magnetic field, μ B is the Bohr magneton, and g B ( D ) is the bright (dark) exciton g -factor. The energy shifts in magnetic field of two bright in-plane states and the dark state are summarized in panel (d) of Figure 5 .…”

mentioning

confidence: 99%

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Quantification of Exciton Fine Structure Splitting in a Two-Dimensional Perovskite Compound

Posmyk

Zawadzka

Dyksik

et al. 2022

J. Phys. Chem. Lett.

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Applications of two-dimensional (2D) perovskites have significantly outpaced the understanding of many fundamental aspects of their photophysics. The optical response of 2D lead halide perovskites is dominated by strongly bound excitonic states. However, a comprehensive experimental verification of the exciton fine structure splitting and associated transition symmetries remains elusive. Here we employ low temperature magneto-optical spectroscopy to reveal the exciton fine structure of (PEA) 2 PbI 4 (here PEA is phenylethylammonium) single crystals. We observe two orthogonally polarized bright in-plane free exciton (FX) states, both accompanied by a manifold of phonon-dressed states that preserve the polarization of the corresponding FX state. Introducing a magnetic field perpendicular to the 2D plane, we resolve the lowest energy dark exciton state, which although theoretically predicted, has systematically escaped experimental observation (in Faraday configuration) until now. These results corroborate standard multiband, effective-mass theories for the exciton fine structure in 2D perovskites and provide valuable quantification of the fine structure splitting in (PEA) 2 PbI 4 .

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confidence: 89%

mentioning

confidence: 99%

Quantification of Exciton Fine Structure Splitting in a Two-Dimensional Perovskite Compound

Posmyk

Zawadzka

Dyksik

et al. 2022

J. Phys. Chem. Lett.

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“…organic cations R 2 NH 3 + ), Consequently, excitons in 2DLPs are hybrid as well, and depending on the model used to treat the exciton in these materials, vastly different exciton Bohr radii have been derived, from 0.1 nm to 2 nm. 9,48,[84][85] Silva & Srimath and colleagues introduced both Frenkel and Wannier formalisms to their analysis of temperature dependent absorption, PL, and 2D TA spectra of (PEA) 2 PbI 4 . 76 The authors observed oscillations of off-diagonal features in the 2D TA spectra at the same frequency as the spacing between sidebands in the ground state excitonic absorption spectrum (~34 meV).…”

Section: Hybrid Exciton Interactions With Polaronsmentioning

confidence: 99%

Excitons in 2D Organic–Inorganic Halide Perovskites

Mauck

Tisdale

2019

Trends in Chemistry

176

172

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Layered perovskites are hybrid two-dimensional materials, formed through the self-assembly of inorganic lead halide networks separated by organic ammonium cation layers. In these natural quantum-well structures, quantum and dielectric confinement lead to strongly bound excitonic states that depend sensitively on the material composition. In this article, we review current understanding of exciton photophysics in layered perovskites and highlight the many ways in which their excitonic properties can be tuned. In particular, we focus on the coupling of exciton dynamics to lattice motion and local distortions of the soft and deformable hybrid lattice. These effects lead to complex excited-state dynamics, presenting new opportunities for design of optoelectronic materials and exploration of fundamental photophysics in quantum confined systems.

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“…In phase I, the slight structural distortion between {CuCl 4 } tetrahedra leads to the band gap broadening and STE enhancement under mild compression. In this pressure range, the smaller band dispersion contributes to a larger reduced mass of excitons, leading to a decreased Bohr radius of excitons. − Such changes result in the enhanced emission of CsCu 2 I 3 in phase I . With increasing pressure above ∼5 GPa, the phase I of CsCu 2 I 3 starts to transfer to the high pressure structure of phase II.…”

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confidence: 99%

Pressure-Induced Remarkable Enhancement of Self-Trapped Exciton Emission in One-Dimensional CsCu₂I₃ with Tetrahedral Units

et al. 2020

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Self-trapped exciton (STE) emissions derived from inorganic octahedral units make metal halide perovskites promising photoluminescence materials for light-emitting applications. However, there is still little understanding of the intrinsic STE emissions in metal halide perovskites or derivatives with nonoctahedral units. In this work, via high pressure compression, remarkable STE emission enhancement is, for the first time, realized in one-dimensional CsCu 2 I 3 crystals with {CuCl 4 } tetrahedral units. The intertetrahedral distortion is believed to induce the slight emission enhancement of the ambient phase under initial compression. Notably, the obvious structural distortions of both inter-and intratetrahedra are responsible for the significant emission enhancement of the high pressure phase. This work not only sheds light on the structure−optical property relationships of tetrahedron-based halide complexes, but also may provide guidance for the design and fabrication of highly luminescent metal halides.

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Magneto-optical study on the excitonic spectrum of (C6H13NH3)2PbI4

Cited by 63 publications

References 10 publications

Quantification of Exciton Fine Structure Splitting in a Two-Dimensional Perovskite Compound

Quantification of Exciton Fine Structure Splitting in a Two-Dimensional Perovskite Compound

Excitons in 2D Organic–Inorganic Halide Perovskites

Pressure-Induced Remarkable Enhancement of Self-Trapped Exciton Emission in One-Dimensional CsCu₂I₃ with Tetrahedral Units

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Magneto-optical study on the excitonic spectrum of (C6H13NH3)2PbI4

Cited by 63 publications

References 10 publications

Quantification of Exciton Fine Structure Splitting in a Two-Dimensional Perovskite Compound

Quantification of Exciton Fine Structure Splitting in a Two-Dimensional Perovskite Compound

Excitons in 2D Organic–Inorganic Halide Perovskites

Pressure-Induced Remarkable Enhancement of Self-Trapped Exciton Emission in One-Dimensional CsCu2I3 with Tetrahedral Units

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Pressure-Induced Remarkable Enhancement of Self-Trapped Exciton Emission in One-Dimensional CsCu₂I₃ with Tetrahedral Units