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Solution Synthesis Approach to Colloidal Cesium Lead Halide Perovskite Nanoplatelets with Monolayer-Level Thickness Control

[Image: see text] We report a colloidal synthesis approach to CsPbBr(3) nanoplatelets (NPLs). The nucleation and growth of the platelets, which takes place at room temperature, is triggered by the injection of acetone in a mixture of precursors that would remain unreactive otherwise. The low growth...

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Autores principales: Akkerman, Quinten A., Motti, Silvia Genaro, Srimath Kandada, Ajay Ram, Mosconi, Edoardo, D’Innocenzo, Valerio, Bertoni, Giovanni, Marras, Sergio, Kamino, Brett A., Miranda, Laura, De Angelis, Filippo, Petrozza, Annamaria, Prato, Mirko, Manna, Liberato
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2016
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4731826/
https://www.ncbi.nlm.nih.gov/pubmed/26726764
http://dx.doi.org/10.1021/jacs.5b12124
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author Akkerman, Quinten A.
Motti, Silvia Genaro
Srimath Kandada, Ajay Ram
Mosconi, Edoardo
D’Innocenzo, Valerio
Bertoni, Giovanni
Marras, Sergio
Kamino, Brett A.
Miranda, Laura
De Angelis, Filippo
Petrozza, Annamaria
Prato, Mirko
Manna, Liberato
author_facet Akkerman, Quinten A.
Motti, Silvia Genaro
Srimath Kandada, Ajay Ram
Mosconi, Edoardo
D’Innocenzo, Valerio
Bertoni, Giovanni
Marras, Sergio
Kamino, Brett A.
Miranda, Laura
De Angelis, Filippo
Petrozza, Annamaria
Prato, Mirko
Manna, Liberato
author_sort Akkerman, Quinten A.
collection PubMed
description [Image: see text] We report a colloidal synthesis approach to CsPbBr(3) nanoplatelets (NPLs). The nucleation and growth of the platelets, which takes place at room temperature, is triggered by the injection of acetone in a mixture of precursors that would remain unreactive otherwise. The low growth temperature enables the control of the plate thickness, which can be precisely tuned from 3 to 5 monolayers. The strong two-dimensional confinement of the carriers at such small vertical sizes is responsible for a narrow PL, strong excitonic absorption, and a blue shift of the optical band gap by more than 0.47 eV compared to that of bulk CsPbBr(3). We also show that the composition of the NPLs can be varied all the way to CsPbBr(3) or CsPbI(3) by anion exchange, with preservation of the size and shape of the starting particles. The blue fluorescent CsPbCl(3) NPLs represent a new member of the scarcely populated group of blue-emitting colloidal nanocrystals. The exciton dynamics were found to be independent of the extent of 2D confinement in these platelets, and this was supported by band structure calculations.
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spelling pubmed-47318262016-02-10 Solution Synthesis Approach to Colloidal Cesium Lead Halide Perovskite Nanoplatelets with Monolayer-Level Thickness Control Akkerman, Quinten A. Motti, Silvia Genaro Srimath Kandada, Ajay Ram Mosconi, Edoardo D’Innocenzo, Valerio Bertoni, Giovanni Marras, Sergio Kamino, Brett A. Miranda, Laura De Angelis, Filippo Petrozza, Annamaria Prato, Mirko Manna, Liberato J Am Chem Soc [Image: see text] We report a colloidal synthesis approach to CsPbBr(3) nanoplatelets (NPLs). The nucleation and growth of the platelets, which takes place at room temperature, is triggered by the injection of acetone in a mixture of precursors that would remain unreactive otherwise. The low growth temperature enables the control of the plate thickness, which can be precisely tuned from 3 to 5 monolayers. The strong two-dimensional confinement of the carriers at such small vertical sizes is responsible for a narrow PL, strong excitonic absorption, and a blue shift of the optical band gap by more than 0.47 eV compared to that of bulk CsPbBr(3). We also show that the composition of the NPLs can be varied all the way to CsPbBr(3) or CsPbI(3) by anion exchange, with preservation of the size and shape of the starting particles. The blue fluorescent CsPbCl(3) NPLs represent a new member of the scarcely populated group of blue-emitting colloidal nanocrystals. The exciton dynamics were found to be independent of the extent of 2D confinement in these platelets, and this was supported by band structure calculations. American Chemical Society 2016-01-02 2016-01-27 /pmc/articles/PMC4731826/ /pubmed/26726764 http://dx.doi.org/10.1021/jacs.5b12124 Text en Copyright © 2016 American Chemical Society This is an open access article published under an ACS AuthorChoice License (http://pubs.acs.org/page/policy/authorchoice_termsofuse.html) , which permits copying and redistribution of the article or any adaptations for non-commercial purposes.
spellingShingle Akkerman, Quinten A.
Motti, Silvia Genaro
Srimath Kandada, Ajay Ram
Mosconi, Edoardo
D’Innocenzo, Valerio
Bertoni, Giovanni
Marras, Sergio
Kamino, Brett A.
Miranda, Laura
De Angelis, Filippo
Petrozza, Annamaria
Prato, Mirko
Manna, Liberato
Solution Synthesis Approach to Colloidal Cesium Lead Halide Perovskite Nanoplatelets with Monolayer-Level Thickness Control
title Solution Synthesis Approach to Colloidal Cesium Lead Halide Perovskite Nanoplatelets with Monolayer-Level Thickness Control
title_full Solution Synthesis Approach to Colloidal Cesium Lead Halide Perovskite Nanoplatelets with Monolayer-Level Thickness Control
title_fullStr Solution Synthesis Approach to Colloidal Cesium Lead Halide Perovskite Nanoplatelets with Monolayer-Level Thickness Control
title_full_unstemmed Solution Synthesis Approach to Colloidal Cesium Lead Halide Perovskite Nanoplatelets with Monolayer-Level Thickness Control
title_short Solution Synthesis Approach to Colloidal Cesium Lead Halide Perovskite Nanoplatelets with Monolayer-Level Thickness Control
title_sort solution synthesis approach to colloidal cesium lead halide perovskite nanoplatelets with monolayer-level thickness control
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4731826/
https://www.ncbi.nlm.nih.gov/pubmed/26726764
http://dx.doi.org/10.1021/jacs.5b12124
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