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Open AccessArticle

Ligand-Assisted Formation of Graphene/Quantum Dot Monolayers with Improved Morphological and Electrical Properties

1
Center of Information Optical Technology, ITMO University, St. Petersburg 197101, Russia
2
College of Materials Science and Engineering, Jilin University, Changchun 130012, China
3
School of Chemistry and CRANN Trinity College Dublin, Dublin 2, Dublin D02 PN40, Ireland
*
Author to whom correspondence should be addressed.
Nanomaterials 2020, 10(4), 723; https://doi.org/10.3390/nano10040723
Received: 13 March 2020 / Revised: 6 April 2020 / Accepted: 8 April 2020 / Published: 11 April 2020
(This article belongs to the Special Issue Electronic and Optical Properties of Nanostructures)
Hybrid nanomaterials based on graphene and PbS quantum dots (QDs) have demonstrated promising applications in optoelectronics. However, the formation of high-quality large-area hybrid films remains technologically challenging. Here, we demonstrate that ligand-assisted self-organization of covalently bonded PbS QDs and reduced graphene oxide (rGO) can be utilized for the formation of highly uniform monolayers. After the post-deposition ligand exchange, these films demonstrated high conductivity and photoresponse. The obtained films demonstrate a remarkable improvement in morphology and charge transport compared to those obtained by the spin-coating method. It is expected that these materials might find a range of applications in photovoltaics and optoelectronics. View Full-Text
Keywords: quantum dots; graphene; self-assembly; spectroscopy; monolayers; charge transport quantum dots; graphene; self-assembly; spectroscopy; monolayers; charge transport
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MDPI and ACS Style

Litvin, A.P.; Babaev, A.A.; Parfenov, P.S.; Dubavik, A.; Cherevkov, S.A.; Baranov, M.A.; Bogdanov, K.V.; Reznik, I.A.; Ilin, P.O.; Zhang, X.; Purcell-Milton, F.; Gun’ko, Y.K.; Fedorov, A.V.; Baranov, A.V. Ligand-Assisted Formation of Graphene/Quantum Dot Monolayers with Improved Morphological and Electrical Properties. Nanomaterials 2020, 10, 723.

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