The Physics of Interlayer Exciton Delocalization in Ruddlesden-Popper Lead Halide Perovskites
(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
- Giovanni, David ; Ramesh, Sankaran LU ; Righetto, Marcello ; Melvin Lim, Jia Wei ; Zhang, Qiannan ; Wang, Yue ; Ye, Senyun ; Xu, Qiang ; Mathews, Nripan and Sum, Tze Chien
- publishing date
- 2021-01-13
- 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
-
- scopus:85098775284
- pmid:33337888
- 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
- 2024-09-20 09:17:55
@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}}, }