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Transforming colloidal Cs4PbBr6 nanocrystals with poly(maleic anhydride-alt-1-octadecene) into stable CsPbBr3 perovskite emitters through intermediate heterostructures

Baranov, Dmitry LU orcid ; Caputo, Gianvito ; Goldoni, Luca ; Dang, Zhiya ; Scarfiello, Riccardo ; De Trizio, Luca ; Portone, Alberto ; Fabbri, Filippo ; Camposeo, Andrea and Pisignano, Dario , et al. (2020) In Chemical Science 11(15). p.3986-3995
Abstract

The preparation of strongly emissive CsPbBr3 perovskite nanocrystals with robust surface passivation is a challenge in the field of lead halide perovskite nanomaterials. We report an approach to prepare polymer-capped CsPbBr3 perovskite nanocrystals by reacting oleylammonium/oleate-capped Cs4PbBr6 nanocrystals with poly(maleic anhydride-alt-1-octadecene) (PMAO). PMAO contains succinic anhydride units that are reactive towards the oleylamine species present on the Cs4PbBr6 nanocrystals' surface and produces polysuccinamic acid, which, in turn, triggers the Cs4PbBr6 to CsPbBr3 conversion. The transformation occurs through the formation of... (More)

The preparation of strongly emissive CsPbBr3 perovskite nanocrystals with robust surface passivation is a challenge in the field of lead halide perovskite nanomaterials. We report an approach to prepare polymer-capped CsPbBr3 perovskite nanocrystals by reacting oleylammonium/oleate-capped Cs4PbBr6 nanocrystals with poly(maleic anhydride-alt-1-octadecene) (PMAO). PMAO contains succinic anhydride units that are reactive towards the oleylamine species present on the Cs4PbBr6 nanocrystals' surface and produces polysuccinamic acid, which, in turn, triggers the Cs4PbBr6 to CsPbBr3 conversion. The transformation occurs through the formation of Cs4PbBr6-CsPbBr3 heterostructures as intermediates, which are captured because of the mild reactivity of PMAO and are investigated by high-resolution electron microscopy. The Cs4PbBr6-CsPbBr3 heterostructures demonstrate a dual emission at cryogenic temperature with an indication of the energy transfer from Cs4PbBr6 to CsPbBr3. The fully-transformed CsPbBr3 NCs have high photoluminescence quantum yield and enhanced colloidal stability, which we attribute to the adhesion of polysuccinamic acid to the NC surface through its multiple functional groups in place of oleate and alkylammonium ligands. The PMAO-induced transformation of Cs4PbBr6 NCs opens up a strategy for the chemical modification of metal halide NCs initially passivated with nucleophilic amines.

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publishing date
type
Contribution to journal
publication status
published
in
Chemical Science
volume
11
issue
15
pages
10 pages
publisher
Royal Society of Chemistry
external identifiers
  • scopus:85083572949
ISSN
2041-6520
DOI
10.1039/d0sc00738b
language
English
LU publication?
no
additional info
Publisher Copyright: © 2020 The Royal Society of Chemistry.
id
760921f8-261a-44dd-af1f-162d452d8eab
date added to LUP
2023-01-17 11:58:16
date last changed
2023-01-27 02:50:02
@article{760921f8-261a-44dd-af1f-162d452d8eab,
  abstract     = {{<p>The preparation of strongly emissive CsPbBr<sub>3</sub> perovskite nanocrystals with robust surface passivation is a challenge in the field of lead halide perovskite nanomaterials. We report an approach to prepare polymer-capped CsPbBr<sub>3</sub> perovskite nanocrystals by reacting oleylammonium/oleate-capped Cs<sub>4</sub>PbBr<sub>6</sub> nanocrystals with poly(maleic anhydride-alt-1-octadecene) (PMAO). PMAO contains succinic anhydride units that are reactive towards the oleylamine species present on the Cs<sub>4</sub>PbBr<sub>6</sub> nanocrystals' surface and produces polysuccinamic acid, which, in turn, triggers the Cs<sub>4</sub>PbBr<sub>6</sub> to CsPbBr<sub>3</sub> conversion. The transformation occurs through the formation of Cs<sub>4</sub>PbBr<sub>6</sub>-CsPbBr<sub>3</sub> heterostructures as intermediates, which are captured because of the mild reactivity of PMAO and are investigated by high-resolution electron microscopy. The Cs<sub>4</sub>PbBr<sub>6</sub>-CsPbBr<sub>3</sub> heterostructures demonstrate a dual emission at cryogenic temperature with an indication of the energy transfer from Cs<sub>4</sub>PbBr<sub>6</sub> to CsPbBr<sub>3</sub>. The fully-transformed CsPbBr<sub>3</sub> NCs have high photoluminescence quantum yield and enhanced colloidal stability, which we attribute to the adhesion of polysuccinamic acid to the NC surface through its multiple functional groups in place of oleate and alkylammonium ligands. The PMAO-induced transformation of Cs<sub>4</sub>PbBr<sub>6</sub> NCs opens up a strategy for the chemical modification of metal halide NCs initially passivated with nucleophilic amines.</p>}},
  author       = {{Baranov, Dmitry and Caputo, Gianvito and Goldoni, Luca and Dang, Zhiya and Scarfiello, Riccardo and De Trizio, Luca and Portone, Alberto and Fabbri, Filippo and Camposeo, Andrea and Pisignano, Dario and Manna, Liberato}},
  issn         = {{2041-6520}},
  language     = {{eng}},
  month        = {{04}},
  number       = {{15}},
  pages        = {{3986--3995}},
  publisher    = {{Royal Society of Chemistry}},
  series       = {{Chemical Science}},
  title        = {{Transforming colloidal Cs<sub>4</sub>PbBr<sub>6</sub> nanocrystals with poly(maleic anhydride-<i>alt</i>-1-octadecene) into stable CsPbBr<sub>3</sub> perovskite emitters through intermediate heterostructures}},
  url          = {{http://dx.doi.org/10.1039/d0sc00738b}},
  doi          = {{10.1039/d0sc00738b}},
  volume       = {{11}},
  year         = {{2020}},
}