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Surface modification for improving the photoredox activity of CsPbBr(3) nanocrystals

In recent years inorganic lead halide perovskite nanocrystals (PNCs) have been used in photocatalytic reactions. The surface chemistry of the PNCs can play an important role in the excited state interactions and efficient charge transfer with redox molecules. In this work, we explore the impact of C...

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Autores principales: Akhil, Syed, Dutt, V. G. Vasavi, Mishra, Nimai
Formato: Online Artículo Texto
Lenguaje:English
Publicado: RSC 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9418449/
https://www.ncbi.nlm.nih.gov/pubmed/36134154
http://dx.doi.org/10.1039/d1na00091h
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author Akhil, Syed
Dutt, V. G. Vasavi
Mishra, Nimai
author_facet Akhil, Syed
Dutt, V. G. Vasavi
Mishra, Nimai
author_sort Akhil, Syed
collection PubMed
description In recent years inorganic lead halide perovskite nanocrystals (PNCs) have been used in photocatalytic reactions. The surface chemistry of the PNCs can play an important role in the excited state interactions and efficient charge transfer with redox molecules. In this work, we explore the impact of CsPbBr(3) nanocrystal surface modification on the excited state interactions with the electron acceptor benzoquinone (BQ) for three different ligand environments: as oleic acid/oleylamine (OA/OAm), oleic acid (OA)/trioctylphosphine (TOP), and oleic acid (OA)/oleylamine (OAm)/trioctylphosphine (TOP) ligands. Our finding concludes that amine-free PNCs (OA/TOP capped) exhibit the best excited state interactions with benzoquinone compared to the conventional oleylamine ligand environment. The photoinduced electron transfer (PET) rate constants were measured from PL-lifetime decay measurement. The amine-free PNCs show the highest PET which is 9 times higher than that of conventional ligand capped PNCs. These results highlight the impact of surface chemistry on the excited-state interactions of CsPbBr(3) NCs and in photocatalytic applications. More importantly, this work concludes that amine-free PNCs maintain a redox-active surface with a high photoinduced electron transfer rate which makes them an ideal candidate for photocatalytic applications.
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spelling pubmed-94184492022-09-20 Surface modification for improving the photoredox activity of CsPbBr(3) nanocrystals Akhil, Syed Dutt, V. G. Vasavi Mishra, Nimai Nanoscale Adv Chemistry In recent years inorganic lead halide perovskite nanocrystals (PNCs) have been used in photocatalytic reactions. The surface chemistry of the PNCs can play an important role in the excited state interactions and efficient charge transfer with redox molecules. In this work, we explore the impact of CsPbBr(3) nanocrystal surface modification on the excited state interactions with the electron acceptor benzoquinone (BQ) for three different ligand environments: as oleic acid/oleylamine (OA/OAm), oleic acid (OA)/trioctylphosphine (TOP), and oleic acid (OA)/oleylamine (OAm)/trioctylphosphine (TOP) ligands. Our finding concludes that amine-free PNCs (OA/TOP capped) exhibit the best excited state interactions with benzoquinone compared to the conventional oleylamine ligand environment. The photoinduced electron transfer (PET) rate constants were measured from PL-lifetime decay measurement. The amine-free PNCs show the highest PET which is 9 times higher than that of conventional ligand capped PNCs. These results highlight the impact of surface chemistry on the excited-state interactions of CsPbBr(3) NCs and in photocatalytic applications. More importantly, this work concludes that amine-free PNCs maintain a redox-active surface with a high photoinduced electron transfer rate which makes them an ideal candidate for photocatalytic applications. RSC 2021-02-26 /pmc/articles/PMC9418449/ /pubmed/36134154 http://dx.doi.org/10.1039/d1na00091h Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/
spellingShingle Chemistry
Akhil, Syed
Dutt, V. G. Vasavi
Mishra, Nimai
Surface modification for improving the photoredox activity of CsPbBr(3) nanocrystals
title Surface modification for improving the photoredox activity of CsPbBr(3) nanocrystals
title_full Surface modification for improving the photoredox activity of CsPbBr(3) nanocrystals
title_fullStr Surface modification for improving the photoredox activity of CsPbBr(3) nanocrystals
title_full_unstemmed Surface modification for improving the photoredox activity of CsPbBr(3) nanocrystals
title_short Surface modification for improving the photoredox activity of CsPbBr(3) nanocrystals
title_sort surface modification for improving the photoredox activity of cspbbr(3) nanocrystals
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9418449/
https://www.ncbi.nlm.nih.gov/pubmed/36134154
http://dx.doi.org/10.1039/d1na00091h
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