Deterministic Nucleation of Nanocrystal Superlattices on 2D Perovskites for Light-Funneling Heterostructures
Filippi, Umberto LU ; Schleusener, Alexander ; Lauciello, Simone ; Krahne, Roman ; Baranov, Dmitry LU
; Manna, Liberato
and Kuno, Masaru
(2026)
In Advanced Materials
- Abstract
- Semiconductor heterostructures that combine components with different
dimensionalities provide an interesting avenue to manipulate the
physical properties of the resulting material. Two-dimensional lead
halide perovskites crystallize as flat microcrystals and have efficient
in-plane exciton mobility, while perovskite nanocrystals are efficient
emitters with a tunable bandgap that can self-assemble into microscopic
superlattices. However, combining such intricate architectures into
heterostructures has been challenging due to the mismatch in solubility
and difficult transfer procedures. Here, we realize heterostructures
where CsPbBr3 nanocrystal superlattices are deterministically... (More) - Semiconductor heterostructures that combine components with different
dimensionalities provide an interesting avenue to manipulate the
physical properties of the resulting material. Two-dimensional lead
halide perovskites crystallize as flat microcrystals and have efficient
in-plane exciton mobility, while perovskite nanocrystals are efficient
emitters with a tunable bandgap that can self-assemble into microscopic
superlattices. However, combining such intricate architectures into
heterostructures has been challenging due to the mismatch in solubility
and difficult transfer procedures. Here, we realize heterostructures
where CsPbBr3 nanocrystal superlattices are deterministically grown along the faces of PEA2PbBr4
2D layered perovskite microcrystals. The growth can either be limited
to the lateral faces of the microcrystals and result in core–crown
epitaxial heterostructures, or extended to the vertical direction
leading to core–shell-like structures. We demonstrate that these
heterostructures can be employed as efficient light-harvesting systems.
In fact, energy can be transferred from the 2D microcrystal domain to
the superlattices, enabling switching between linear and nonlinear
carrier recombination regimes by tuning the excitation fluence.
Moreover, by exploiting the lifetime shortening of CsPbBr3
nanocrystal emission upon sample cooling, we ensure that energy transfer
occurs after the biexcitonic and single-excitonic decays of the
nanocrystals, effectively extending the radiative life time of the
superlattices. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/857ca74e-6879-44cd-bdd3-d47dfb9ba968
- author
- Filippi, Umberto
LU
; Schleusener, Alexander
; Lauciello, Simone
; Krahne, Roman
; Baranov, Dmitry
LU
; Manna, Liberato
and Kuno, Masaru
- organization
- publishing date
- 2026-08-06
- type
- Contribution to journal
- publication status
- epub
- subject
- in
- Advanced Materials
- article number
- e74290
- pages
- 12 pages
- publisher
- John Wiley & Sons Inc.
- external identifiers
-
- scopus:105046770351
- pmid:42560014
- ISSN
- 1521-4095
- DOI
- 10.1002/adma.74290
- project
- Engineering of Superfluorescent Nanocrystal Solids
- language
- English
- LU publication?
- yes
- additional info
- © 2026 The Author(s). Advanced Materials published by Wiley‐VCH GmbH.
- id
- 857ca74e-6879-44cd-bdd3-d47dfb9ba968
- date added to LUP
- 2026-08-15 18:17:32
- date last changed
- 2026-08-30 04:54:20
@article{857ca74e-6879-44cd-bdd3-d47dfb9ba968,
abstract = {{Semiconductor heterostructures that combine components with different <br>
dimensionalities provide an interesting avenue to manipulate the <br>
physical properties of the resulting material. Two-dimensional lead <br>
halide perovskites crystallize as flat microcrystals and have efficient <br>
in-plane exciton mobility, while perovskite nanocrystals are efficient <br>
emitters with a tunable bandgap that can self-assemble into microscopic <br>
superlattices. However, combining such intricate architectures into <br>
heterostructures has been challenging due to the mismatch in solubility <br>
and difficult transfer procedures. Here, we realize heterostructures <br>
where CsPbBr<sub>3</sub> nanocrystal superlattices are deterministically grown along the faces of PEA<sub>2</sub>PbBr<sub>4</sub><br>
2D layered perovskite microcrystals. The growth can either be limited <br>
to the lateral faces of the microcrystals and result in core–crown <br>
epitaxial heterostructures, or extended to the vertical direction <br>
leading to core–shell-like structures. We demonstrate that these <br>
heterostructures can be employed as efficient light-harvesting systems. <br>
In fact, energy can be transferred from the 2D microcrystal domain to <br>
the superlattices, enabling switching between linear and nonlinear <br>
carrier recombination regimes by tuning the excitation fluence. <br>
Moreover, by exploiting the lifetime shortening of CsPbBr<sub>3</sub> <br>
nanocrystal emission upon sample cooling, we ensure that energy transfer<br>
occurs after the biexcitonic and single-excitonic decays of the <br>
nanocrystals, effectively extending the radiative life time of the <br>
superlattices.}},
author = {{Filippi, Umberto and Schleusener, Alexander and Lauciello, Simone and Krahne, Roman and Baranov, Dmitry and Manna, Liberato and Kuno, Masaru}},
issn = {{1521-4095}},
language = {{eng}},
month = {{08}},
publisher = {{John Wiley & Sons Inc.}},
series = {{Advanced Materials}},
title = {{Deterministic Nucleation of Nanocrystal Superlattices on 2D Perovskites for Light-Funneling Heterostructures}},
url = {{http://dx.doi.org/10.1002/adma.74290}},
doi = {{10.1002/adma.74290}},
year = {{2026}},
}