Cargando…
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....
Autores principales: | , , , |
---|---|
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 |
_version_ | 1783413082011205632 |
---|---|
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. |
format | Online Article Text |
id | pubmed-6477804 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | American Chemical
Society |
record_format | MEDLINE/PubMed |
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 |
work_keys_str_mv | AT baranovdmitry investigationintothephotoluminescenceredshiftincesiumleadbromidenanocrystalsuperlattices AT tosostefano investigationintothephotoluminescenceredshiftincesiumleadbromidenanocrystalsuperlattices AT imranmuhammad investigationintothephotoluminescenceredshiftincesiumleadbromidenanocrystalsuperlattices AT mannaliberato investigationintothephotoluminescenceredshiftincesiumleadbromidenanocrystalsuperlattices |