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Solution Processing and Self-Organization of PbS Quantum Dots Passivated with Formamidinium Lead Iodide (FAPbI(3))
[Image: see text] Solution-processed lead sulfide quantum dots (PbS QDs) are very attractive as NIR-active semiconductors for the fabrication of cost-efficient optoelectronic devices. To control the thin film carrier transport, as well as stability, surface passivation is of crucial importance. Here...
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/PMC7331203/ https://www.ncbi.nlm.nih.gov/pubmed/32637850 http://dx.doi.org/10.1021/acsomega.0c02319 |
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author | Aynehband, Samaneh Mohammadi, Maryam Thorwarth, Kerstin Hany, Roland Nüesch, Frank Alain Rossell, Marta D. Pauer, Robin Nunzi, Jean-Michel Simchi, Abdolreza |
author_facet | Aynehband, Samaneh Mohammadi, Maryam Thorwarth, Kerstin Hany, Roland Nüesch, Frank Alain Rossell, Marta D. Pauer, Robin Nunzi, Jean-Michel Simchi, Abdolreza |
author_sort | Aynehband, Samaneh |
collection | PubMed |
description | [Image: see text] Solution-processed lead sulfide quantum dots (PbS QDs) are very attractive as NIR-active semiconductors for the fabrication of cost-efficient optoelectronic devices. To control the thin film carrier transport, as well as stability, surface passivation is of crucial importance. Here, we present the successful surface passivation of PbS QDs by the formamidinium lead iodide (FAPbI(3)) ligand. An effective procedure for the fabrication of FAPbI(3)-passivated PbS QDs through a binary-phase ligand exchange protocol in hexane and n-methylformamide is demonstrated. It is shown that this solution-processed ligand exchange drastically changes the photoluminescence intensity, exciton recombination dynamics, and carrier lifetime of the nanocrystals. The solution casting of the ligand-exchanged nanocrystals into thin films results in the periodic ordering of QDs in a square superlattice with close contacts. Planar graphene/QD photodetectors fabricated with PbS QDs passivated with FAPbI(3) show substantially increased thermal stability as compared to similar devices using PbS QDs passivated with commonly used methylammonium lead iodide. |
format | Online Article Text |
id | pubmed-7331203 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | American Chemical Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-73312032020-07-06 Solution Processing and Self-Organization of PbS Quantum Dots Passivated with Formamidinium Lead Iodide (FAPbI(3)) Aynehband, Samaneh Mohammadi, Maryam Thorwarth, Kerstin Hany, Roland Nüesch, Frank Alain Rossell, Marta D. Pauer, Robin Nunzi, Jean-Michel Simchi, Abdolreza ACS Omega [Image: see text] Solution-processed lead sulfide quantum dots (PbS QDs) are very attractive as NIR-active semiconductors for the fabrication of cost-efficient optoelectronic devices. To control the thin film carrier transport, as well as stability, surface passivation is of crucial importance. Here, we present the successful surface passivation of PbS QDs by the formamidinium lead iodide (FAPbI(3)) ligand. An effective procedure for the fabrication of FAPbI(3)-passivated PbS QDs through a binary-phase ligand exchange protocol in hexane and n-methylformamide is demonstrated. It is shown that this solution-processed ligand exchange drastically changes the photoluminescence intensity, exciton recombination dynamics, and carrier lifetime of the nanocrystals. The solution casting of the ligand-exchanged nanocrystals into thin films results in the periodic ordering of QDs in a square superlattice with close contacts. Planar graphene/QD photodetectors fabricated with PbS QDs passivated with FAPbI(3) show substantially increased thermal stability as compared to similar devices using PbS QDs passivated with commonly used methylammonium lead iodide. American Chemical Society 2020-06-19 /pmc/articles/PMC7331203/ /pubmed/32637850 http://dx.doi.org/10.1021/acsomega.0c02319 Text en Copyright © 2020 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 | Aynehband, Samaneh Mohammadi, Maryam Thorwarth, Kerstin Hany, Roland Nüesch, Frank Alain Rossell, Marta D. Pauer, Robin Nunzi, Jean-Michel Simchi, Abdolreza Solution Processing and Self-Organization of PbS Quantum Dots Passivated with Formamidinium Lead Iodide (FAPbI(3)) |
title | Solution Processing and Self-Organization of PbS Quantum
Dots Passivated with Formamidinium Lead Iodide (FAPbI(3)) |
title_full | Solution Processing and Self-Organization of PbS Quantum
Dots Passivated with Formamidinium Lead Iodide (FAPbI(3)) |
title_fullStr | Solution Processing and Self-Organization of PbS Quantum
Dots Passivated with Formamidinium Lead Iodide (FAPbI(3)) |
title_full_unstemmed | Solution Processing and Self-Organization of PbS Quantum
Dots Passivated with Formamidinium Lead Iodide (FAPbI(3)) |
title_short | Solution Processing and Self-Organization of PbS Quantum
Dots Passivated with Formamidinium Lead Iodide (FAPbI(3)) |
title_sort | solution processing and self-organization of pbs quantum
dots passivated with formamidinium lead iodide (fapbi(3)) |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7331203/ https://www.ncbi.nlm.nih.gov/pubmed/32637850 http://dx.doi.org/10.1021/acsomega.0c02319 |
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