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...

Descripción completa

Detalles Bibliográficos
Autores principales: Shamsi, Javad, Kubicki, Dominik, Anaya, Miguel, Liu, Yun, Ji, Kangyu, Frohna, Kyle, Grey, Clare P., Friend, Richard H., Stranks, Samuel D.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2020
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
_version_ 1783546867242500096
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
work_keys_str_mv AT shamsijavad stablehexylphosphonatecappedblueemittingquantumconfinedcspbbr3nanoplatelets
AT kubickidominik stablehexylphosphonatecappedblueemittingquantumconfinedcspbbr3nanoplatelets
AT anayamiguel stablehexylphosphonatecappedblueemittingquantumconfinedcspbbr3nanoplatelets
AT liuyun stablehexylphosphonatecappedblueemittingquantumconfinedcspbbr3nanoplatelets
AT jikangyu stablehexylphosphonatecappedblueemittingquantumconfinedcspbbr3nanoplatelets
AT frohnakyle stablehexylphosphonatecappedblueemittingquantumconfinedcspbbr3nanoplatelets
AT greyclarep stablehexylphosphonatecappedblueemittingquantumconfinedcspbbr3nanoplatelets
AT friendrichardh stablehexylphosphonatecappedblueemittingquantumconfinedcspbbr3nanoplatelets
AT strankssamueld stablehexylphosphonatecappedblueemittingquantumconfinedcspbbr3nanoplatelets