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About Carrier's Self-Trapping and Dynamical Rashba Splitting in the 2D Hybrid Perovskite (BA)2(MA)2Pb3l10

Qi, Weiyan ; Ponzoni, Stefano ; Huitric, Guénolé ; Gorelov, Vitaly ; Pramanik, Ashim ; Laplace, Yannis ; Marsi, Marino ; Papalazarou, Evangelos ; Maehrlein, Sebastian F. and Deleporte, Emmanuelle , et al. (2026) In Small 22(17).
Abstract

Time- and Angle-Resolved Photoelectron Spectroscopy (tr-ARPES) is employed to monitor photoexcited electrons in the 2D hybrid perovskite (BA) (Formula presented.) (MA) (Formula presented.) (Formula presented.) (Formula presented.). Photoelectron intensity maps are in good agreement with ab-initio calculations of the band structure. The effective mass is (Formula presented.) and (Formula presented.) for holes and electrons, respectively. In the photoexcited state, spin-orbit splitting of the conduction band cannot be resolved. This sets the upper bound of photoinduced Rashba coupling to (Formula presented.) eVÅ. The correlated electron-hole plasma evolves in Wannier excitons with Bohr radius of 2.8 nm, while no sign of self-trapping in... (More)

Time- and Angle-Resolved Photoelectron Spectroscopy (tr-ARPES) is employed to monitor photoexcited electrons in the 2D hybrid perovskite (BA) (Formula presented.) (MA) (Formula presented.) (Formula presented.) (Formula presented.). Photoelectron intensity maps are in good agreement with ab-initio calculations of the band structure. The effective mass is (Formula presented.) and (Formula presented.) for holes and electrons, respectively. In the photoexcited state, spin-orbit splitting of the conduction band cannot be resolved. This sets the upper bound of photoinduced Rashba coupling to (Formula presented.) eVÅ. The correlated electron-hole plasma evolves in Wannier excitons with Bohr radius of 2.8 nm, while no sign of self-trapping in small polarons is found within the investigated time window of up to 120 ps following photoexcitation.

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organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
2D perovskite, band structure, exciton, Rashba, self trapping
in
Small
volume
22
issue
17
article number
e11410
publisher
John Wiley & Sons Inc.
external identifiers
  • pmid:41739001
  • scopus:105031050188
ISSN
1613-6810
DOI
10.1002/smll.202511410
language
English
LU publication?
yes
additional info
Publisher Copyright: © 2026 Wiley-VCH GmbH.
id
78d4ebd0-848c-4bc6-8d63-0e07f6e1159f
date added to LUP
2026-04-13 15:39:04
date last changed
2026-06-08 21:01:44
@article{78d4ebd0-848c-4bc6-8d63-0e07f6e1159f,
  abstract     = {{<p>Time- and Angle-Resolved Photoelectron Spectroscopy (tr-ARPES) is employed to monitor photoexcited electrons in the 2D hybrid perovskite (BA) (Formula presented.) (MA) (Formula presented.) (Formula presented.) (Formula presented.). Photoelectron intensity maps are in good agreement with ab-initio calculations of the band structure. The effective mass is (Formula presented.) and (Formula presented.) for holes and electrons, respectively. In the photoexcited state, spin-orbit splitting of the conduction band cannot be resolved. This sets the upper bound of photoinduced Rashba coupling to (Formula presented.) eVÅ. The correlated electron-hole plasma evolves in Wannier excitons with Bohr radius of 2.8 nm, while no sign of self-trapping in small polarons is found within the investigated time window of up to 120 ps following photoexcitation.</p>}},
  author       = {{Qi, Weiyan and Ponzoni, Stefano and Huitric, Guénolé and Gorelov, Vitaly and Pramanik, Ashim and Laplace, Yannis and Marsi, Marino and Papalazarou, Evangelos and Maehrlein, Sebastian F. and Deleporte, Emmanuelle and Mallik, Nitin and Taleb-Ibrahimi, Amina and Bendounan, Azzedine and Zheng, Kaibo and Pullerits, Tönu and Perfetti, Luca}},
  issn         = {{1613-6810}},
  keywords     = {{2D perovskite; band structure; exciton; Rashba; self trapping}},
  language     = {{eng}},
  month        = {{03}},
  number       = {{17}},
  publisher    = {{John Wiley & Sons Inc.}},
  series       = {{Small}},
  title        = {{About Carrier's Self-Trapping and Dynamical Rashba Splitting in the 2D Hybrid Perovskite (BA)<sub>2</sub>(MA)<sub>2</sub>Pb<sub>3</sub>l<sub>10</sub>}},
  url          = {{http://dx.doi.org/10.1002/smll.202511410}},
  doi          = {{10.1002/smll.202511410}},
  volume       = {{22}},
  year         = {{2026}},
}