Stable Hexylphosphonate-Capped Blue-Emitting Quantum-Confined CsPbBr(3) Nanoplatelets
[Image: see text] Quantum-confined CsPbBr(3) nanoplatelets (NPLs) are extremely promising for use in low-cost blue light-emitting diodes, but their tendency to coalesce in both solution and film form, particularly under operating device conditions with injected charge-carriers, is hindering their ad...
Autores principales: | , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Chemical Society
2020
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7296617/ https://www.ncbi.nlm.nih.gov/pubmed/32566752 http://dx.doi.org/10.1021/acsenergylett.0c00935 |
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author | Shamsi, Javad Kubicki, Dominik Anaya, Miguel Liu, Yun Ji, Kangyu Frohna, Kyle Grey, Clare P. Friend, Richard H. Stranks, Samuel D. |
author_facet | Shamsi, Javad Kubicki, Dominik Anaya, Miguel Liu, Yun Ji, Kangyu Frohna, Kyle Grey, Clare P. Friend, Richard H. Stranks, Samuel D. |
author_sort | Shamsi, Javad |
collection | PubMed |
description | [Image: see text] Quantum-confined CsPbBr(3) nanoplatelets (NPLs) are extremely promising for use in low-cost blue light-emitting diodes, but their tendency to coalesce in both solution and film form, particularly under operating device conditions with injected charge-carriers, is hindering their adoption. We show that employing a short hexyl-phosphonate ligand (C(6)H(15)O(3)P) in a heat-up colloidal approach for pure, blue-emitting quantum-confined CsPbBr(3) NPLs significantly suppresses these coalescence phenomena compared to particles capped with the typical oleyammonium ligands. The phosphonate-passivated NPL thin films exhibit photoluminescence quantum yields of ∼40% at 450 nm with exceptional ambient and thermal stability. The color purity is preserved even under continuous photoexcitation of carriers equivalent to LED current densities of ∼3.5 A/cm(2). (13)C, (133)Cs, and (31)P solid-state MAS NMR reveal the presence of phosphonate on the surface. Density functional theory calculations suggest that the enhanced stability is due to the stronger binding affinity of the phosphonate ligand compared to the ammonium ligand. |
format | Online Article Text |
id | pubmed-7296617 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | American Chemical Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-72966172020-06-17 Stable Hexylphosphonate-Capped Blue-Emitting Quantum-Confined CsPbBr(3) Nanoplatelets Shamsi, Javad Kubicki, Dominik Anaya, Miguel Liu, Yun Ji, Kangyu Frohna, Kyle Grey, Clare P. Friend, Richard H. Stranks, Samuel D. ACS Energy Lett [Image: see text] Quantum-confined CsPbBr(3) nanoplatelets (NPLs) are extremely promising for use in low-cost blue light-emitting diodes, but their tendency to coalesce in both solution and film form, particularly under operating device conditions with injected charge-carriers, is hindering their adoption. We show that employing a short hexyl-phosphonate ligand (C(6)H(15)O(3)P) in a heat-up colloidal approach for pure, blue-emitting quantum-confined CsPbBr(3) NPLs significantly suppresses these coalescence phenomena compared to particles capped with the typical oleyammonium ligands. The phosphonate-passivated NPL thin films exhibit photoluminescence quantum yields of ∼40% at 450 nm with exceptional ambient and thermal stability. The color purity is preserved even under continuous photoexcitation of carriers equivalent to LED current densities of ∼3.5 A/cm(2). (13)C, (133)Cs, and (31)P solid-state MAS NMR reveal the presence of phosphonate on the surface. Density functional theory calculations suggest that the enhanced stability is due to the stronger binding affinity of the phosphonate ligand compared to the ammonium ligand. American Chemical Society 2020-05-15 2020-06-12 /pmc/articles/PMC7296617/ /pubmed/32566752 http://dx.doi.org/10.1021/acsenergylett.0c00935 Text en Copyright © 2020 American Chemical Society This is an open access article published under a Creative Commons Attribution (CC-BY) License (http://pubs.acs.org/page/policy/authorchoice_ccby_termsofuse.html) , which permits unrestricted use, distribution and reproduction in any medium, provided the author and source are cited. |
spellingShingle | Shamsi, Javad Kubicki, Dominik Anaya, Miguel Liu, Yun Ji, Kangyu Frohna, Kyle Grey, Clare P. Friend, Richard H. Stranks, Samuel D. Stable Hexylphosphonate-Capped Blue-Emitting Quantum-Confined CsPbBr(3) Nanoplatelets |
title | Stable Hexylphosphonate-Capped Blue-Emitting Quantum-Confined
CsPbBr(3) Nanoplatelets |
title_full | Stable Hexylphosphonate-Capped Blue-Emitting Quantum-Confined
CsPbBr(3) Nanoplatelets |
title_fullStr | Stable Hexylphosphonate-Capped Blue-Emitting Quantum-Confined
CsPbBr(3) Nanoplatelets |
title_full_unstemmed | Stable Hexylphosphonate-Capped Blue-Emitting Quantum-Confined
CsPbBr(3) Nanoplatelets |
title_short | Stable Hexylphosphonate-Capped Blue-Emitting Quantum-Confined
CsPbBr(3) Nanoplatelets |
title_sort | stable hexylphosphonate-capped blue-emitting quantum-confined
cspbbr(3) nanoplatelets |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7296617/ https://www.ncbi.nlm.nih.gov/pubmed/32566752 http://dx.doi.org/10.1021/acsenergylett.0c00935 |
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