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The Physics of Interlayer Exciton Delocalization in Ruddlesden-Popper Lead Halide Perovskites

Giovanni, David ; Ramesh, Sankaran LU orcid ; Righetto, Marcello ; Melvin Lim, Jia Wei ; Zhang, Qiannan ; Wang, Yue ; Ye, Senyun ; Xu, Qiang ; Mathews, Nripan and Sum, Tze Chien (2021) In Nano Letters 21(1). p.405-413
Abstract

Two-dimensional (2D) lead halide Ruddlesden-Popper perovskites (RPP) have recently emerged as a prospective material system for optoelectronic applications. Their self-assembled multi quantum-well structure gives rise to the novel interwell energy funnelling phenomenon, which is of broad interests for photovoltaics, light-emission applications, and emerging technologies (e.g., spintronics). Herein, we develop a realistic finite quantum-well superlattice model that corroborates the hypothesis of exciton delocalization across different quantum-wells in RPP. Such delocalization leads to a sub-50 fs coherent energy transfer between adjacent wells, with the efficiency depending on the RPP phase matching and the organic large cation barrier... (More)

Two-dimensional (2D) lead halide Ruddlesden-Popper perovskites (RPP) have recently emerged as a prospective material system for optoelectronic applications. Their self-assembled multi quantum-well structure gives rise to the novel interwell energy funnelling phenomenon, which is of broad interests for photovoltaics, light-emission applications, and emerging technologies (e.g., spintronics). Herein, we develop a realistic finite quantum-well superlattice model that corroborates the hypothesis of exciton delocalization across different quantum-wells in RPP. Such delocalization leads to a sub-50 fs coherent energy transfer between adjacent wells, with the efficiency depending on the RPP phase matching and the organic large cation barrier lengths. Our approach provides a coherent and comprehensive account for both steady-state and transient dynamical experimental results in RPPs. Importantly, these findings pave the way for a deeper understanding of these systems, as a cornerstone crucial for establishing material design rules to realize efficient RPP-based devices.

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author
; ; ; ; ; ; ; ; and
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Delocalization, Exciton, Funnelling, Quantum Well, Ruddlesden-Popper perovskites
in
Nano Letters
volume
21
issue
1
pages
9 pages
publisher
The American Chemical Society (ACS)
external identifiers
  • pmid:33337888
  • scopus:85098775284
ISSN
1530-6984
DOI
10.1021/acs.nanolett.0c03800
language
English
LU publication?
no
additional info
Publisher Copyright: © 2020 American Chemical Society.
id
3c1782bc-2dce-4ada-a47d-251af264ce62
date added to LUP
2023-02-15 22:10:12
date last changed
2024-06-14 00:05:18
@article{3c1782bc-2dce-4ada-a47d-251af264ce62,
  abstract     = {{<p>Two-dimensional (2D) lead halide Ruddlesden-Popper perovskites (RPP) have recently emerged as a prospective material system for optoelectronic applications. Their self-assembled multi quantum-well structure gives rise to the novel interwell energy funnelling phenomenon, which is of broad interests for photovoltaics, light-emission applications, and emerging technologies (e.g., spintronics). Herein, we develop a realistic finite quantum-well superlattice model that corroborates the hypothesis of exciton delocalization across different quantum-wells in RPP. Such delocalization leads to a sub-50 fs coherent energy transfer between adjacent wells, with the efficiency depending on the RPP phase matching and the organic large cation barrier lengths. Our approach provides a coherent and comprehensive account for both steady-state and transient dynamical experimental results in RPPs. Importantly, these findings pave the way for a deeper understanding of these systems, as a cornerstone crucial for establishing material design rules to realize efficient RPP-based devices.</p>}},
  author       = {{Giovanni, David and Ramesh, Sankaran and Righetto, Marcello and Melvin Lim, Jia Wei and Zhang, Qiannan and Wang, Yue and Ye, Senyun and Xu, Qiang and Mathews, Nripan and Sum, Tze Chien}},
  issn         = {{1530-6984}},
  keywords     = {{Delocalization; Exciton; Funnelling; Quantum Well; Ruddlesden-Popper perovskites}},
  language     = {{eng}},
  month        = {{01}},
  number       = {{1}},
  pages        = {{405--413}},
  publisher    = {{The American Chemical Society (ACS)}},
  series       = {{Nano Letters}},
  title        = {{The Physics of Interlayer Exciton Delocalization in Ruddlesden-Popper Lead Halide Perovskites}},
  url          = {{http://dx.doi.org/10.1021/acs.nanolett.0c03800}},
  doi          = {{10.1021/acs.nanolett.0c03800}},
  volume       = {{21}},
  year         = {{2021}},
}