Cargando…

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...

Descripción completa

Detalles Bibliográficos
Autores principales: Aynehband, Samaneh, Mohammadi, Maryam, Thorwarth, Kerstin, Hany, Roland, Nüesch, Frank Alain, Rossell, Marta D., Pauer, Robin, Nunzi, Jean-Michel, Simchi, Abdolreza
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2020
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
_version_ 1783553274799980544
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
work_keys_str_mv AT aynehbandsamaneh solutionprocessingandselforganizationofpbsquantumdotspassivatedwithformamidiniumleadiodidefapbi3
AT mohammadimaryam solutionprocessingandselforganizationofpbsquantumdotspassivatedwithformamidiniumleadiodidefapbi3
AT thorwarthkerstin solutionprocessingandselforganizationofpbsquantumdotspassivatedwithformamidiniumleadiodidefapbi3
AT hanyroland solutionprocessingandselforganizationofpbsquantumdotspassivatedwithformamidiniumleadiodidefapbi3
AT nueschfrankalain solutionprocessingandselforganizationofpbsquantumdotspassivatedwithformamidiniumleadiodidefapbi3
AT rossellmartad solutionprocessingandselforganizationofpbsquantumdotspassivatedwithformamidiniumleadiodidefapbi3
AT pauerrobin solutionprocessingandselforganizationofpbsquantumdotspassivatedwithformamidiniumleadiodidefapbi3
AT nunzijeanmichel solutionprocessingandselforganizationofpbsquantumdotspassivatedwithformamidiniumleadiodidefapbi3
AT simchiabdolreza solutionprocessingandselforganizationofpbsquantumdotspassivatedwithformamidiniumleadiodidefapbi3