Shape-Pure, Nearly Monodispersed CsPbBr3 Nanocubes Prepared Using Secondary Aliphatic Amines
Imran, Muhammad ; Ijaz, Palvasha ; Baranov, Dmitry LU
; Goldoni, Luca
; Petralanda, Urko
; Akkerman, Quinten
; Abdelhady, Ahmed L.
; Prato, Mirko
; Bianchini, Paolo
and Infante, Ivan
, et al.
(2018)
In Nano Letters
18(12).
p.7822-7831
- Abstract
Fully inorganic cesium lead halide perovskite (CsPbX3) nanocrystals (NCs) have been extensively studied due to their excellent optical properties, especially their high photoluminescence quantum yield (PLQY) and the ease with which the PL can be tuned across the visible spectrum. So far, most strategies for synthesizing CsPbX3 NCs are highly sensitive to the processing conditions and ligand combinations. For example, in the synthesis of nanocubes of different sizes, it is not uncommon to have samples that contain various other shapes, such as nanoplatelets and nanosheets. Here, we report a new colloidal synthesis method for preparing shape-pure and nearly... (More)
Fully inorganic cesium lead halide perovskite (CsPbX3) nanocrystals (NCs) have been extensively studied due to their excellent optical properties, especially their high photoluminescence quantum yield (PLQY) and the ease with which the PL can be tuned across the visible spectrum. So far, most strategies for synthesizing CsPbX3 NCs are highly sensitive to the processing conditions and ligand combinations. For example, in the synthesis of nanocubes of different sizes, it is not uncommon to have samples that contain various other shapes, such as nanoplatelets and nanosheets. Here, we report a new colloidal synthesis method for preparing shape-pure and nearly monodispersed CsPbBr3 nanocubes using secondary amines. Regardless of the length of the alkyl chains, the oleic acid concentration, and the reaction temperature, only cube-shaped NCs were obtained. The shape purity and narrow size distribution of the nanocubes are evident from their sharp excitonic features and their ease of self-assembly in superlattices, reaching lateral dimensions of up to 50 μm. We attribute this excellent shape and phase purity to the inability of secondary amines to find the right steric conditions at the surface of the NCs, which consequently limits the formation of low-dimensional structures. Furthermore, no contamination from other phases was observed, not even from Cs4PbBr6, presumably due to the poor ability of secondary aliphatic amines to coordinate to PbBr2 and, hence, to provide a reaction environment that is depleted in Pb.
(Less)
- author
- Imran, Muhammad
; Ijaz, Palvasha
; Baranov, Dmitry
LU
; Goldoni, Luca
; Petralanda, Urko
; Akkerman, Quinten
; Abdelhady, Ahmed L.
; Prato, Mirko
; Bianchini, Paolo
and Infante, Ivan
, et al. (More)
- Imran, Muhammad
; Ijaz, Palvasha
; Baranov, Dmitry
LU
; Goldoni, Luca
; Petralanda, Urko
; Akkerman, Quinten
; Abdelhady, Ahmed L.
; Prato, Mirko
; Bianchini, Paolo
; Infante, Ivan
and Manna, Liberato
(Less)
- publishing date
- 2018-12-12
- type
- Contribution to journal
- publication status
- published
- keywords
- colloidal synthesis, inorganic metal halides, nanocubes, perovskites, Secondary amines, superlattices
- in
- Nano Letters
- volume
- 18
- issue
- 12
- pages
- 10 pages
- publisher
- The American Chemical Society (ACS)
- external identifiers
-
- pmid:30383965
- scopus:85056716780
- ISSN
- 1530-6984
- DOI
- 10.1021/acs.nanolett.8b03598
- language
- English
- LU publication?
- no
- additional info
- Publisher Copyright: © 2018 American Chemical Society.
- id
- 8c1d854a-8916-4feb-9021-5f9cba7dde24
- date added to LUP
- 2023-01-17 13:52:04
- date last changed
- 2024-04-18 09:14:46
@article{8c1d854a-8916-4feb-9021-5f9cba7dde24,
abstract = {{<p> Fully inorganic cesium lead halide perovskite (CsPbX<sub>3</sub>) nanocrystals (NCs) have been extensively studied due to their excellent optical properties, especially their high photoluminescence quantum yield (PLQY) and the ease with which the PL can be tuned across the visible spectrum. So far, most strategies for synthesizing CsPbX<sub>3</sub> NCs are highly sensitive to the processing conditions and ligand combinations. For example, in the synthesis of nanocubes of different sizes, it is not uncommon to have samples that contain various other shapes, such as nanoplatelets and nanosheets. Here, we report a new colloidal synthesis method for preparing shape-pure and nearly monodispersed CsPbBr<sub>3</sub> nanocubes using secondary amines. Regardless of the length of the alkyl chains, the oleic acid concentration, and the reaction temperature, only cube-shaped NCs were obtained. The shape purity and narrow size distribution of the nanocubes are evident from their sharp excitonic features and their ease of self-assembly in superlattices, reaching lateral dimensions of up to 50 μm. We attribute this excellent shape and phase purity to the inability of secondary amines to find the right steric conditions at the surface of the NCs, which consequently limits the formation of low-dimensional structures. Furthermore, no contamination from other phases was observed, not even from Cs<sub>4</sub>PbBr<sub>6</sub>, presumably due to the poor ability of secondary aliphatic amines to coordinate to PbBr<sub>2</sub> and, hence, to provide a reaction environment that is depleted in Pb.</p>}},
author = {{Imran, Muhammad and Ijaz, Palvasha and Baranov, Dmitry and Goldoni, Luca and Petralanda, Urko and Akkerman, Quinten and Abdelhady, Ahmed L. and Prato, Mirko and Bianchini, Paolo and Infante, Ivan and Manna, Liberato}},
issn = {{1530-6984}},
keywords = {{colloidal synthesis; inorganic metal halides; nanocubes; perovskites; Secondary amines; superlattices}},
language = {{eng}},
month = {{12}},
number = {{12}},
pages = {{7822--7831}},
publisher = {{The American Chemical Society (ACS)}},
series = {{Nano Letters}},
title = {{Shape-Pure, Nearly Monodispersed CsPbBr<sub>3</sub> Nanocubes Prepared Using Secondary Aliphatic Amines}},
url = {{http://dx.doi.org/10.1021/acs.nanolett.8b03598}},
doi = {{10.1021/acs.nanolett.8b03598}},
volume = {{18}},
year = {{2018}},
}