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Investigation into the Photoluminescence Red Shift in Cesium Lead Bromide Nanocrystal Superlattices

[Image: see text] The formation of cesium lead bromide (CsPbBr(3)) nanocrystal superlattices (NC SLs) is accompanied by a red shift in the NC photoluminescence (PL). The values of the PL red shift reported in the literature range from none to ∼100 meV without unifying explanation of the differences....

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Autores principales: Baranov, Dmitry, Toso, Stefano, Imran, Muhammad, Manna, Liberato
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2019
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6477804/
https://www.ncbi.nlm.nih.gov/pubmed/30676762
http://dx.doi.org/10.1021/acs.jpclett.9b00178
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author Baranov, Dmitry
Toso, Stefano
Imran, Muhammad
Manna, Liberato
author_facet Baranov, Dmitry
Toso, Stefano
Imran, Muhammad
Manna, Liberato
author_sort Baranov, Dmitry
collection PubMed
description [Image: see text] The formation of cesium lead bromide (CsPbBr(3)) nanocrystal superlattices (NC SLs) is accompanied by a red shift in the NC photoluminescence (PL). The values of the PL red shift reported in the literature range from none to ∼100 meV without unifying explanation of the differences. Using a combination of confocal PL microcopy and steady-state optical spectroscopies we found that an overall PL red shift of ∼96 meV measured from a macroscopic sample of CsPbBr(3) NC SLs has several contributions: ∼ 10–15 meV from a red shift in isolated and clean SLs, ∼ 30 meV from SLs with impurities of bulklike CsPbBr(3) crystals on their surface, and up to 50 meV or more of the red shift coming from a photon propagation effect, specifically self-absorption. In addition, a self-assembly technique for growing micron-sized NC SLs on the surface of perfluorodecalin, an inert perfluorinated liquid and an antisolvent for NCs, is described.
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spelling pubmed-64778042019-04-24 Investigation into the Photoluminescence Red Shift in Cesium Lead Bromide Nanocrystal Superlattices Baranov, Dmitry Toso, Stefano Imran, Muhammad Manna, Liberato J Phys Chem Lett [Image: see text] The formation of cesium lead bromide (CsPbBr(3)) nanocrystal superlattices (NC SLs) is accompanied by a red shift in the NC photoluminescence (PL). The values of the PL red shift reported in the literature range from none to ∼100 meV without unifying explanation of the differences. Using a combination of confocal PL microcopy and steady-state optical spectroscopies we found that an overall PL red shift of ∼96 meV measured from a macroscopic sample of CsPbBr(3) NC SLs has several contributions: ∼ 10–15 meV from a red shift in isolated and clean SLs, ∼ 30 meV from SLs with impurities of bulklike CsPbBr(3) crystals on their surface, and up to 50 meV or more of the red shift coming from a photon propagation effect, specifically self-absorption. In addition, a self-assembly technique for growing micron-sized NC SLs on the surface of perfluorodecalin, an inert perfluorinated liquid and an antisolvent for NCs, is described. American Chemical Society 2019-01-24 2019-02-07 /pmc/articles/PMC6477804/ /pubmed/30676762 http://dx.doi.org/10.1021/acs.jpclett.9b00178 Text en Copyright © 2019 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 Baranov, Dmitry
Toso, Stefano
Imran, Muhammad
Manna, Liberato
Investigation into the Photoluminescence Red Shift in Cesium Lead Bromide Nanocrystal Superlattices
title Investigation into the Photoluminescence Red Shift in Cesium Lead Bromide Nanocrystal Superlattices
title_full Investigation into the Photoluminescence Red Shift in Cesium Lead Bromide Nanocrystal Superlattices
title_fullStr Investigation into the Photoluminescence Red Shift in Cesium Lead Bromide Nanocrystal Superlattices
title_full_unstemmed Investigation into the Photoluminescence Red Shift in Cesium Lead Bromide Nanocrystal Superlattices
title_short Investigation into the Photoluminescence Red Shift in Cesium Lead Bromide Nanocrystal Superlattices
title_sort investigation into the photoluminescence red shift in cesium lead bromide nanocrystal superlattices
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6477804/
https://www.ncbi.nlm.nih.gov/pubmed/30676762
http://dx.doi.org/10.1021/acs.jpclett.9b00178
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