Control of PbSe quantum dot surface chemistry and photophysics using an alkylselenide ligand

ACS Nano
Barbara K HughesMatthew C Beard

Abstract

We have synthesized alkylselenide reagents to replace the native oleate ligand on PbSe quantum dots (QDs) in order to investigate the effect of surface modification on their stoichiometry, photophysics, and air stability. The alkylselenide reagent removes all of the oleate on the QD surface and results in Se addition; however, complete Se enrichment does not occur, achieving a 53% decrease in the amount of excess Pb for 2 nm diameter QDs and a 23% decrease for 10 nm QDs. Our analysis suggests that the Se ligand preferentially binds to the {111} faces, which are more prevalent in smaller QDs. We find that attachment of the alkylselenide ligand to the QD surface enhances oxidative resistance, likely resulting from a more stable bond between surface Pb atoms and the alkylselenide ligand compared to Pb-oleate. However, binding of the alkylselenide ligand produces a separate nonradiative relaxation route that partially quenches PL, suggesting the formation of a dark hole-trap.

References

Oct 5, 2006·Journal of the American Chemical Society·Jonathan S SteckelMoungi G Bawendi
Feb 21, 2007·Journal of the American Chemical Society·Jacek Jasieniak, Paul Mulvaney
Apr 10, 2008·Journal of the American Chemical Society·Matt LawArthur J Nozik
Oct 22, 2008·Journal of the American Chemical Society·Iwan MoreelsZeger Hens
Nov 13, 2009·The Journal of Physical Chemistry. a·Abdessamad BenidarManuel Yáñez
Feb 19, 2010·Journal of the American Chemical Society·Derek D LovingoodGeoffrey F Strouse
Jul 31, 2010·Science·Constanze SchlieheHorst Weller
Feb 11, 2011·Journal of the American Chemical Society·Joshua J ChoiTobias Hanrath
Aug 25, 2011·The Journal of Physical Chemistry. B·Sergei V Krivov
Oct 5, 2011·ACS Nano·Illan J Kramer, Edward H Sargent
Feb 15, 2012·ACS Nano·Clive R BealingRichard G Hennig
Apr 21, 2011·The Journal of Physical Chemistry Letters·Helen E ChappellJustin C Johnson

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Citations

Sep 24, 2013·Chemical Reviews·Illan J Kramer, Edward H Sargent
Jun 19, 2012·ACS Nano·Barbara K HughesMatthew C Beard
Dec 25, 2013·Annual Review of Physical Chemistry·Mark D PetersonEmily A Weiss
Nov 7, 2015·Accounts of Chemical Research·Richard L Brutchey
Nov 6, 2015·The Journal of Physical Chemistry Letters·Efrat Lifshitz
Aug 19, 2015·The Journal of Physical Chemistry Letters·Dmitry A KislitsynGeorge V Nazin
Apr 3, 2016·Angewandte Chemie·Roberto GrisorioCarlo Giansante
Jul 15, 2015·Inorganic Chemistry·Isabelle ChambrierManfred Bochmann
Aug 9, 2016·Chemical Reviews·Rachel D HarrisEmily A Weiss
Aug 27, 2013·Journal of the American Chemical Society·Peter K B PalomakiNathan R Neale
Feb 6, 2014·ACS Nano·Mark D PetersonEmily A Weiss
Mar 19, 2013·Journal of the American Chemical Society·Hyekyoung ChoiSohee Jeong
Feb 26, 2014·Journal of the American Chemical Society·Barbara K HughesMatthew C Beard
Jun 12, 2014·Journal of the American Chemical Society·Ju Young WooSohee Jeong
Jan 27, 2017·Journal of the American Chemical Society·Peter E ChenJonathan S Owen
Jun 27, 2017·Journal of the American Chemical Society·Daniel M KroupaMatthew C Beard
Sep 8, 2017·Chemistry : a European Journal·Hyekyoung ChoiSohee Jeong
Mar 29, 2020·Dalton Transactions : an International Journal of Inorganic Chemistry·David UngBrandi M Cossairt
Mar 28, 2017·Coordination Chemistry Reviews·Sung Jun LimAndrew M Smith
May 28, 2013·Physical Review Letters·Donghun KimJeffrey C Grossman
Jun 12, 2021·Nano Letters·Yan ZhangXiaogang Peng
Oct 11, 2017·The Journal of Physical Chemistry Letters·Jung Hoon SongYong-Hyun Kim
May 31, 2018·Journal of the American Chemical Society·Jon A BenderSean T Roberts
Sep 16, 2020·The Journal of Physical Chemistry Letters·Sebastian VolkVanessa Wood
Aug 28, 2021·Chemical Reviews·Matthew M D RoyEric Rivard

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